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Lu S, Zhang L, Lu Y, Chen M, Wang Z. Host Volatiles Potentially Drive Two Evolutionarily Related Weevils to Select Different Grains. INSECTS 2024; 15:300. [PMID: 38786856 DOI: 10.3390/insects15050300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 04/17/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024]
Abstract
The Sitophilus zeamais (maize weevil) and Sitophilus oryzae (rice weevil) are two insect pests that have caused huge economic losses to stored grains worldwide. It is urgent to develop an environmentally friendly strategy for the control of these destructive pests. Here, the olfactory-mediated selection preference of the two weevil species to three stored grains was analyzed, which should help establish a pull-push system in managing them. Bioassays showed that maize weevil adults prefer to select maize, followed by paddy and wheat, while rice weevil adults mainly migrate towards wheat. Volatile analyses revealed that 2-ethylhexanol, piperitone, and (+)-Δ-cadiene are the major components in volatiles from both maize and wheat, but the abundance of these chemicals is much lower in maize than that in wheat. The volatile limonene was only detected in paddy. Y-tube bioassays suggest that 2-ethylhexanol, piperitone, and (+)-Δ-cadiene were all attractive to both weevils, whereas limonene was attractive only to rice weevils. Overall, maize weevil appeared more sensitive to the tested volatiles based on having much lower effective concentrations of these volatiles needed to attract them. The differences in volatile profiles among the grains and the sensitivity of the two species towards these volatiles may explain the behavioral differences between maize and rice weevils in selecting host grains. The differences in sensitivity of maize and rice weevils towards host volatile components with abundance differences are likely determinants driving the two insect species to migrate towards different host grains.
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Affiliation(s)
- Shaohua Lu
- School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
| | - Lingfang Zhang
- School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
| | - Yujie Lu
- School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
| | - Mingshun Chen
- USDA-ARS-PSERU, Kansas State University, Manhattan, KS 66506, USA
| | - Zhengyan Wang
- School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China
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Baltzegar JF, Gould F. Development of the first high-density linkage map in the maize weevil, Sitophilus zeamais. PeerJ 2023; 11:e15414. [PMID: 37337584 PMCID: PMC10276983 DOI: 10.7717/peerj.15414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 04/24/2023] [Indexed: 06/21/2023] Open
Abstract
The maize weevil, Sitophilus zeamais, is a worldwide pest that disproportionately affects subsistence farmers in developing countries. Damage from this pest threatens food security in these communities as widely available and effective control methods are lacking. With advances over the last decade in the development of genetic pest management techniques, addressing pest issues at the ecosystem level as opposed to the farm level may be a possibility. However, pest species selected for genetic management techniques require a well-characterized genome and few genomic tools have been developed for S. zeamais. Here, we have measured the genome size and developed the first genetic linkage map for this species. The genome size was determined using flow cytometry as 682 Mb and 674 Mb for females and males, respectively. The linkage map contains 11 linkage groups, which correspond to the 10 autosomes and 1 X-chromosome found in the species and it contains 1,121 SNPs. This linkage map will be useful for assembling a complete genome for S. zeamais.
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Affiliation(s)
| | - Fred Gould
- Genetic Engineering and Society Center, North Carolina State University, Raleigh, NC, United States
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, North Carolina, United States
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Witecka J, Malejky-Kłusek N, Solarz K, Pawełczyk O, Kłyś M, Izdebska A, Maślanko W, Asman M. The Identification of Potential Immunogenic Antigens in Particular Active Developmental Stages of the Rice Weevil ( Sitophilus oryzae). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:3917. [PMID: 36900928 PMCID: PMC10002274 DOI: 10.3390/ijerph20053917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND The rice weevil (Sitophilus oryzae) originates from subtropical and tropical areas of Asia and Africa, but it also appears on other continents, mostly as a result of trade in rice. It may occur in grain fields as well as in storage facilities, and cause allergenic reactions. The aim of this study was to identify the potential antigens in all developmental stages of S. oryzae, which may cause an allergic response in humans. METHODS Sera of 30 patients were tested for the presence of IgE antibodies to antigens from three life stages of the rice weevil. To identify protein fractions containing potential allergens, proteins collected from larvae, pupae, and adults separated by sex of S. oryzae were fractionated by SDS-PAGE. Then, they were probed with anti-human, anti-IgE monoclonal antibodies, fractionated by SDS-PAGE and detected by Western blotting. RESULTS In total, 26 protein fractions of males and 22 fractions of other life stages of S. oryzae (larvae, pupae, and females) positively reacted with the examined sera. CONCLUSIONS The conducted study showed that S. oryzae may be a source of many antigens which may cause the potential allergic reactions in humans.
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Affiliation(s)
- Joanna Witecka
- Department of Parasitology, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland
| | - Natalia Malejky-Kłusek
- Chair of Ecology and Environmental Protection, Institute of Biology, Pedagogical University of Cracow, Podchorążych 2 St., 30-084 Cracow, Poland
| | - Krzysztof Solarz
- Department of Parasitology, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland
| | - Olga Pawełczyk
- Department of Parasitology, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland
| | - Małgorzata Kłyś
- Chair of Ecology and Environmental Protection, Institute of Biology, Pedagogical University of Cracow, Podchorążych 2 St., 30-084 Cracow, Poland
| | - Aleksandra Izdebska
- Chair of Ecology and Environmental Protection, Institute of Biology, Pedagogical University of Cracow, Podchorążych 2 St., 30-084 Cracow, Poland
| | - Weronika Maślanko
- Department of Animal Ethology and Wildlife Management, Faculty of Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13 St., 20-950 Lublin, Poland
| | - Marek Asman
- Department of Medical and Molecular Biology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland
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Singh SK, Jagadeesan R, Thangaraj SR, Selvapandian U, Nayak MK, Subbarayalu M. Phenotypic and molecular analyses in rice weevil, Sitophilus oryzae (Linneaus) (Coleoptera: Curculionidae): identification of a super kdr mutation, T929I, conferring resistance to deltamethrin. PEST MANAGEMENT SCIENCE 2021; 77:3289-3299. [PMID: 33763965 DOI: 10.1002/ps.6373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/13/2021] [Accepted: 03/24/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND The rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae) is a cosmopolitan pest of stored cereal grains and other commodities globally. Infestations caused by S. oryzae makes grains unsuitable for consumption, processing, and export. Deltamethrin, a synthetic pyrethroid insecticide, is widely used in major grain storages in India as a prophylactic treatment to control this pest. However, recurrent use of this insecticide had led to genetic resistance in S. oryzae, questioning its ongoing use at the current recommended concentration. RESULTS Dose response analysis of resistant (Delta-R) and susceptible (Lab-S) strains of S. oryzae collected from grain storages across southern India, revealed that Delta-R was 134-fold more resistant than the Lab-S at median lethal concentration (LC50 ). A concentration of 180 ppm over 48 h effectively discriminated 16 resistant field populations from Lab-S with per cent resistance ranging from 8.72% to 75.86%. Exposing all the resistant populations to 1000 ppm over 48 h identified 12 populations with strongly resistant individuals and confirmed the existence of two distinct resistance phenotypes, 'weak' and 'strong' in S. oryzae. Furthermore, sequence analysis of the voltage-gated sodium channel (vgsc) gene in Delta-R identified a single target site mutation, T929I conferring resistance in S. oryzae. CAPS (Cleaved Amplified Polymorphic Sequence) marker analysis of this allele confirmed that frequency of resistance is high (up to 0.96) supporting the results of phenotypic analysis. CONCLUSION Both phenotype and molecular marker analyses clearly demonstrated that deltamethrin at 180 and 1000 ppm can be used to discriminate weakly and strongly resistant populations in S. oryzae, respectively. Resistance diagnostics based on the mutation, T929I, supports our phenotypic data and indicates that resistance to deltamethrin in S. oryzae is prevalent in southern parts of India, stressing the need to identify a synergist or suitable alternatives. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Sonu K Singh
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Rajeswaran Jagadeesan
- Department of Agriculture and Fisheries, Queensland, Ecosciences Precinct, Brisbane, QLD, Australia
| | - Sonai Rajan Thangaraj
- Department of Agricultural Entomology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore, India
| | - Upasna Selvapandian
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, India
| | - Manoj K Nayak
- Department of Agriculture and Fisheries, Queensland, Ecosciences Precinct, Brisbane, QLD, Australia
| | - Mohankumar Subbarayalu
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, India
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Amorim IC, Melo ES, Moura RC, Wallau GL. Diverse mobilome of Dichotomius (Luederwaldtinia) schiffleri (Coleoptera: Scarabaeidae) reveals long-range horizontal transfer events of DNA transposons. Mol Genet Genomics 2020; 295:1339-1353. [PMID: 32601732 DOI: 10.1007/s00438-020-01703-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 06/17/2020] [Indexed: 10/24/2022]
Abstract
Transposable elements (TEs) are mobile DNA sequences that are able to move from one genomic location to another. These selfish elements are known as genomic parasites, since they hijack the host molecular machinery to generate new copies of themselves. The mobilization of TEs can be seen as a natural mutagen because new TE copies can insert into different loci and impact host genomic structure through different mechanisms. Although our knowledge about TEs is improving with new genomes available, there is still very limited data about the mobilome of species from the Coleoptera order, the most diverse order of insects, including species from the Scarabaeidae family. Therefore, the main goal of this study was to characterize the mobilome of D. (Luederwaldtinia) schiffleri, based on low-coverage genome sequencing, and reconstruct their evolutionary history. We used a combination of four different approaches for TE characterization and maximum likelihood phylogenetic analysis to study their evolution. We found a large and diverse mobilome composed of 38 TE superfamilies, 20 DNA transposon and 18 retrotransposons, accounting for 21% of the genome. Moreover, we found a number of incongruences between the TE and host phylogenetic trees in three DNA transposon TE superfamilies, which represents five TE families, suggesting possible horizontal transfer events between highly divergent taxa. In summary, we found an abundant and diverse mobilome and a number of horizontal transfer events that have shaped the evolutionary history of this species.
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Affiliation(s)
- I C Amorim
- Laboratório de Biodiversidade E Genética de Insetos, Instituto de Ciências Biológicas, Universidade de Pernambuco, Rua Arnóbio Marques, 310- Santo Amaro, Recife, PE, CEP: 50100-130, Brasil
| | - E S Melo
- Departamento de Entomologia, Instituto Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil
| | - R C Moura
- Laboratório de Biodiversidade E Genética de Insetos, Instituto de Ciências Biológicas, Universidade de Pernambuco, Rua Arnóbio Marques, 310- Santo Amaro, Recife, PE, CEP: 50100-130, Brasil.
| | - G L Wallau
- Departamento de Entomologia, Instituto Aggeu Magalhães, FIOCRUZ, Recife, PE, Brasil.
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Huang Y, Liao M, Yang Q, Shi S, Xiao J, Cao H. Knockdown of NADPH-cytochrome P450 reductase and CYP6MS1 increases the susceptibility of Sitophilus zeamais to terpinen-4-ol. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 162:15-22. [PMID: 31836049 DOI: 10.1016/j.pestbp.2019.07.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 06/20/2019] [Accepted: 07/13/2019] [Indexed: 06/10/2023]
Abstract
Terpinen-4-ol showed highly insecticidal activity to stored-grain pest Sitophilus zeamais, and cytochrome P450s were strongly induced in response to terpinen-4-ol fumigation. Understanding of the function of P450 enzyme system in the susceptibility to terpinen-4-ol in S. zeamais will benefit the potential application of terpinen-4-ol in controlling stored-grain pests. In the present study, the synergist piperonyl butoxide increased the toxicity of terpinen-4-ol to S. zeamais, with a synergism ratio of 3.5-fold. Two isoforms of NADPH-cytochrome P450 reductase (SzCPR) were identified, with the difference at the N-terminal. SzCPR contained an N-terminal membrane anchor, FMN, FAD, and NADP binding domains. Expression levels of SzCPR were upregulated by tea tree oil (TTO) and its main constituent terpinen-4-ol under different concentrations and time periods. RNAi was generated for S. zeamais by feeding adults dsRNA and the knockdown of SzCPR increased the susceptibility of S. zeamais to terpinen-4-ol, with higher mortality of adults than control under terpinen-4-ol fumigation. Further RNAi analysis showed that P450 gene CYP6MS1 mediated the susceptibility of S. zeamais to terpinen-4-ol. These results revealed that cytochrome P450 enzyme system, especially CYP6MS1 participated in the susceptibility of S. zeamais to terpinen-4-ol. The findings provided a foundation to clarify the metabolic mechanisms of terpinen-4-ol in stored-grain pests.
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Affiliation(s)
- Yong Huang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Min Liao
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Qianqian Yang
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Su Shi
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Jinjing Xiao
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Haiqun Cao
- Key Laboratory of Biology and Sustainable Management of Plant Diseases and Pests of Anhui Higher Education Institutes, School of Plant Protection, Anhui Agricultural University, Hefei, China.
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Nanini F, Maggio DH, Ferronato P, Rugno G, Yamamoto PT, Corrêa AS. Molecular Marker to Identify Diaphorina citri (Hemiptera: Liviidae) DNA in Gut Content of Predators. NEOTROPICAL ENTOMOLOGY 2019; 48:927-933. [PMID: 31707596 DOI: 10.1007/s13744-019-00721-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 09/22/2019] [Indexed: 06/10/2023]
Abstract
Diaphorina citri Kuwayama is the vector of the pathogenic bacteria Candidatus Liberibacter spp., the causative agent of Huanglongbing (HLB), the most serious disease of citrus worldwide. Because predatory insects have been historically neglected in biological control programs for D. citri, the impact of generalist predators on D. citri population densities is little understood. A useful tool to evaluate the dynamics of predator-prey interactions is molecular analysis of predators' gut content. We constructed a specific molecular marker to detect D. citri DNA in the gut content of predator insects, for use in estimating the predation rate of field-collected predators in citrus orchards on D. citri. Bioassays of the DNA half-life detection time were carried out with two predatory species, the ladybird beetle Hippodamia convergens Guérin-Méneville and the lacewing Chrysoperla externa (Hagen). The D. citri DNA half-life detection time (DT50) was 6.11 h for H. convergens and 5.46 h for C. externa. One hundred and seven field-collected predators were used for gut-content analysis (52 larvae/adults of ladybirds and 55 larvae of lacewings). The assays showed that 17.3% of ladybirds but no lacewings tested positive for D. citri DNA. These results show that generalist predators can contribute to biological control of D. citri and should be considered for use in pest management programs in citrus orchards.
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Affiliation(s)
- F Nanini
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil
| | - D H Maggio
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil
| | - P Ferronato
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil
| | - G Rugno
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil
| | - P T Yamamoto
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil
| | - A S Corrêa
- Depto de Entomologia e Acarologia, ESALQ - Univ de São Paulo, Piracicaba, SP 13418-900, Brasil.
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Pantoja-Gomez LM, Corrêa AS, de Oliveira LO, Guedes RNC. Common Origin of Brazilian and Colombian Populations of the Neotropical Coffee Leaf Miner, Leucoptera coffeella (Lepidoptera: Lyonetiidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:924-931. [PMID: 30649357 DOI: 10.1093/jee/toy416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Indexed: 06/09/2023]
Abstract
The coffee leaf miner, Leucoptera coffeella (Guérin-Mèneville & Perrottet, 1842), probably infested coffee plants in Neotropical America during the 19th century. The species subsequently became a key pest of coffee plants in Brazil, but not in Colombia, the two main coffee producers in the region. The contrasting importance of the coffee leaf miner in Brazil and Colombia may be the result of the evolutionary and demographic history of this species. Therefore, our goal was to test two alternative hypotheses regarding the possible genetic origins of this species: 1) leaf miners in both countries share the same origin and 2) the leaf miner arrived in both countries independently from distinct sources and subsequently diversified without genetic exchange between countries. Thus, DNA sequence data of 21 populations were collected (Brazil, 16; Colombia, 5), and partial sequences of their cytochrome oxidase subunit I (COI), cytochrome b (Cytb), and the nuclear internal transcribed spacer (ITS) region were obtained to test these hypotheses. Both nuclear and mitochondrial molecular markers showed low nucleotide diversity. Analyses of molecular variance indicated higher variability within population in both concatenated mitochondrial genes and ITS region (70.57 and 84.01%, respectively). Finally, geno/haplotype networks showed each central geno/haplotypes that displayed high frequency and were distributed widely in both countries. Low-frequency geno/haplotypes were at tip positions connected to the central geno/haplotypes through single mutation steps, suggesting that the Neotropical coffee leaf miner in both Brazil and Colombia consists of a single species and exhibits a common and recent genetic origin.
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Affiliation(s)
- Laura M Pantoja-Gomez
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- Departamento de Entomologia e Acarologia, Escola Superior de Agricultura 'Luiz de Quieroz'-Universidade de São Paulo (ESALQ-USP), Piracicaba, SP, Brazil
| | - Alberto S Corrêa
- Departamento de Entomologia e Acarologia, Escola Superior de Agricultura 'Luiz de Quieroz'-Universidade de São Paulo (ESALQ-USP), Piracicaba, SP, Brazil
| | - Luiz Orlando de Oliveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, MG, Brazil
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Huang Y, Liao M, Yang Q, Xiao J, Hu Z, Cao H. iTRAQ-based quantitative proteome revealed metabolic changes of Sitophilus zeamais in response to terpinen-4-ol fumigation. PEST MANAGEMENT SCIENCE 2019; 75:444-451. [PMID: 30039555 DOI: 10.1002/ps.5135] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/15/2018] [Accepted: 07/02/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Terpinen-4-ol has high insecticidal activity towards the stored-grain pest Sitophilus zeamais, a key pest of cereals worldwide. Comparative proteomic analysis can identify proteins related to the response to terpinen-4-ol fumigation in S. zeamais, improving our understanding of the mechanisms behind the insecticidal activity and the detoxification of terpinen-4-ol in insects. RESULTS Using an isobaric tags for relative and absolute quantification (iTRAQ)-based strategy, 2761 proteins were obtained from S. zeamais adults. Comparative proteomic analysis showed that 215 proteins were upregulated and 129 were downregulated after exposure to terpinen-4-ol. Based on functional classifications, differentially expressed proteins (DEPs) were enriched in the carbohydrate, energy and xenobiotics metabolism pathways. DEPs associated with lactose, sucrose and starch metabolism were identified, including alcohol dehydrogenase, aldose reductase, β-galactosidase, maltase, and myrosinase. Among detoxification-related proteins, the levels of 14 cytochrome P450s, seven glutathione S-transferases, and three UDP-glucuronosyltransferases were altered, most of which were upregulated after exposure to terpinen-4-ol. CONCLUSION Metabolic changes indicated that terpinen-4-ol could affect the energy supply and potentially be metabolized and detoxified by various enzymes in S. zeamais. The results provide a foundation for further functional studies of key proteins mediated by terpinen-4-ol. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Yong Huang
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Min Liao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Qianqian Yang
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Jinjing Xiao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Zhaoyin Hu
- College of Plant Protection, Anhui Agricultural University, Hefei, China
| | - Haiqun Cao
- College of Plant Protection, Anhui Agricultural University, Hefei, China
- Provincial Key Laboratory for Agri-Food Safety, Hefei, China
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10
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Haddi K, Valbon WR, Viteri Jumbo LO, de Oliveira LO, Guedes RNC, Oliveira EE. Diversity and convergence of mechanisms involved in pyrethroid resistance in the stored grain weevils, Sitophilus spp. Sci Rep 2018; 8:16361. [PMID: 30397209 PMCID: PMC6218525 DOI: 10.1038/s41598-018-34513-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 10/09/2018] [Indexed: 02/01/2023] Open
Abstract
Target-site mutations and changes in insect metabolism or behavior are common mechanisms in insecticide-resistant insects. The co-occurrence of such mechanisms in a pest strain is a prominent threat to their management, particularly when alternative compounds are scarce. Pyrethroid resistance among stored grain weevils (i.e., Sitophilus spp.) is an example of a long-standing concern, for which reports of resistance generally focus on a single mechanism in a single species. Here, we investigated pyrethroid resistance in maize and rice weevils (i.e., Sitophilus zeamais and S. oryzae), exploring potential knockdown resistance (kdr) mutations in their sodium channels (primary site for pyrethroid actions) and potential changes in their detoxification and walking processes. Resistance in pyrethroid-resistant rice weevils was associated with the combination of a kdr mutation (L1014F) and increases in walking and detoxification activities, while another kdr mutation (T929I) combined with increases in walking activity were the primary pyrethroid resistance mechanisms in maize weevils. Our results suggest that the selection of pyrethroid-resistant individuals in these weevil species may result from multiple and differential mechanisms because the L1014F mutation was only detected in Latin American rice weevils (e.g., Brazil, Argentina and Uruguay), not in Australian and Turkish rice weevils or Brazilian maize weevils.
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Affiliation(s)
- Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil.
- Science without Border Program, Associate Researcher, Programa de Pós-Graduação em Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-000, Brazil.
| | - Wilson R Valbon
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Luis O Viteri Jumbo
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Luiz O de Oliveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Raul N C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
- USDA Agricultural Research Service, San Joaquin Valley Agricultural Sciences Center, Parlier, CA, 93648, USA
| | - Eugenio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil.
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Silva GA, Santos IB, Campos SO, Silva Galdino TV, Fidelis Morais EG, Martins JC, Ferreira LR, Carvalho Guedes RN, Picanço MC. Spatial distribution and losses by grain destroying insects in transgenic corn expressing the toxin Cry1Ab. PLoS One 2018; 13:e0201201. [PMID: 30096146 PMCID: PMC6086412 DOI: 10.1371/journal.pone.0201201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/10/2018] [Indexed: 11/18/2022] Open
Abstract
Insect pests are one of the factors that most impact plant yield. The magnitude of the losses and the spatiotemporal pest distribution in crops is a result of their interactions with the environment. Therefore, the understanding of the causes of production losses and the pest spatial patterns is important for the development of suitable sampling plans and pest management programs. Thus, this study aimed to quantify grain losses caused by insects and to determine the spatial distribution pattern of arthropod pest species in Bt and non-Bt corn. The prevailing insect pests in the corn ears were the earworm and fall armyworm caterpillars (Helicoverpa spp. and Spodoptera frugiperda), the cornsilk fly (Euxesta spp.), the maize weevil (Sitophilus zeamais), and the square-necked grain beetle (Cathartus quadricollis). The non-Bt corn was more attacked by the caterpillars and the weevil, while Bt corn was more affected by the cornsilk fly Euxesta spp. Spatial dependence was significant for the damage caused by the caterpillars, the grain beetle and the maize weevil in both the Bt and non-Bt corn genotypes. The range of the damage caused by the insects was between 9.0-9.7 m for the caterpillars, 6.9-12.20 m for the cornsilk fly, 10.7-80.4 m for the square-necked grain beetle, and 51.9-170.7 m for the maize weevil. The pattern of the spatial distribution of pest damage in both corn genotypes (i.e., Bt and non-Bt corn) was similar with a prevalence of moderate to strong spatial dependence and aggregate damage distribution. The plants near to the sampling points exhibited injury and infestation levels similar to those of the sampled plants.
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Affiliation(s)
- Gerson Adriano Silva
- Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Izailda Barbosa Santos
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | | | | | - Júlio Claudio Martins
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Lino Roberto Ferreira
- Departamento de Fitotecnia, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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12
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Huang Y, Liao M, Yang Q, Xiao J, Hu Z, Zhou L, Cao H. Transcriptome profiling reveals differential gene expression of detoxification enzymes in Sitophilus zeamais responding to terpinen-4-ol fumigation. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 149:44-53. [PMID: 30033015 DOI: 10.1016/j.pestbp.2018.05.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 05/13/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
Plant essential oils with high bioactivity provide environmental friendly alternatives for synthetic pesticides. Melaleuca alternifolia essential oil and its main constituent terpinen-4-ol have high insecticidal activity to Sitophilus zeamais Motschulsky. Terpinen-4-ol may be metabolized by human and insect cytochrome P450s. However, little is known about how insects systemically respond to terpinen-4-ol. In this study, we used an RNA-seq approach to evaluate the global gene expression of S. zeamais after terpinen-4-ol fumigation. Duplicates of fumigated and control groups, for a total of four libraries, were collected for sequencing. A total of 36,117 unigenes with an average length of 1036 bp were generated in the de novo assembled transcriptome. Comparative analysis of S. zeamais libraries identified 592 differentially expressed genes (DEGs), of which 308 and 284 genes were up- and down-regulated in response to terpinen-4-ol fumigation, respectively. GO and KEGG functional analyses were performed for up and downregulated DEGs separately, showing these DEGs were enriched for terms related to catalytic activity, carbohydrate metabolism, and xenobiotics biodegradation and metabolism. DEGs encoding enzymes for detoxification were detected, including sixteen cytochrome P450s (P450s), eight glutathione S-transferase (GSTs), fourteen esterase (ESTs), ten UDP-glucuronosyltransferase (UGTs), and two ATP-binding cassette transporter (ABC transporter) genes. Real-time quantitative PCR confirmed that ten P450s, three GSTs and one EST were up-regulated dramatically after exposure to terpinen-4-ol at different concentrations and over a time course. The results provided a transcriptional overview of the changes in a stored-grain pest in response to terpinen-4-ol fumigation. The analysis revealed the expression levels of detoxification genes were altered, especially for P450s, and provided candidate genes for understanding systemic metabolic responses to terpinen-4-ol in insects.
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Affiliation(s)
- Yong Huang
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Min Liao
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Qianqian Yang
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Jinjing Xiao
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Zhaoyin Hu
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Lijun Zhou
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China
| | - Haiqun Cao
- School of Plant Protection, Anhui Agricultural University, Hefei 230036, China; Provincial Key Laboratory for Agri-Food Safety, Hefei 230036, China.
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13
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Wu F, Yan XP. Distribution of the Related Weevil Species Sitophilus oryzae and S. zeamais (Coleoptera: Curculionidae) in Farmer Stored Grains of China. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:1461-1468. [PMID: 29608742 DOI: 10.1093/jee/toy061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 06/08/2023]
Abstract
Sitophilus oryzae (Coleoptera: Curculionidae) and Sitophilus zeamais (Coleoptera: Curculionidae) are major insect pests of farm-stored grains in China. Moreover, their respective distribution and prevalence are not yet assessed for grain storage facilities in China. The two species are often difficult to identify by morphology because they are immature or their presence is only evident from fragments. Species-specific primers were, therefore, designed based on the cytochrome c oxidase subunit I (COI) of 34 populations found throughout China and three foreign populations. Following the validation of this molecular-based approach for species identification, the distribution of the two species in China was determined from 68 different grain storage facilities. The results indicate that S. zeamais is prevalent throughout the country whereas S. oryzae is mainly present in the south and the center of China. It is believed that this distribution pattern is in function of ecological adaptation, mostly determined by temperature and the grain species. This is the first report of its kind, demonstrating the distribution of S. zeamais and S. oryzae in grain storage facilities throughout China and analyzed by species-specific primers of COI.
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Affiliation(s)
- F Wu
- Sinograin Chengdu Grain Storage Research Institute, Chengdu, China
| | - X P Yan
- Sinograin Chengdu Grain Storage Research Institute, Chengdu, China
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14
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Hong KJ, Lee W, Park YJ, Yang JO. First confirmation of the distribution of rice weevil, Sitophilus oryzae, in South Korea. JOURNAL OF ASIA-PACIFIC BIODIVERSITY 2018. [DOI: 10.1016/j.japb.2017.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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15
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Solà M, Riudavets J, Agustí N. Detection and identification of five common internal grain insect pests by multiplex PCR. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.08.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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16
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Corrêa AS, Vinson CC, Braga LS, Guedes RNC, de Oliveira LO. Ancient origin and recent range expansion of the maize weevil Sitophilus zeamais, and its genealogical relationship to the rice weevil S. oryzae. BULLETIN OF ENTOMOLOGICAL RESEARCH 2017; 107:9-20. [PMID: 27806733 DOI: 10.1017/s0007485316000687] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Archeological records attest the early association of Sitophilus with stored cereals from the beginning of agriculture on Asia. The maize weevil (Sitophilus zeamais) became particularly damaging to maize, a cereal crop domesticated on Mesoamerica. We investigated the late evolutionary history of the maize weevil to gain insights on its origin, timing of association with maize, and genealogical relationship to the almost morphologically indistinguishable rice weevil (Sitophilus oryzae). Two mitochondrial genes (cytochrome oxidase subunit I and cytochrome oxidase subunit II) and the nuclear ribosomal gene region were partially sequenced. Analyses showed that the maize weevil shared no haplotypes with the rice weevil; instead, each species exhibited distinct mitogroups and ribogroups. The two weevil species likely split about 8.7 million years ago (95% highest posterior density: 4.0-15.0). Microsatellite data analyses sorted the 309 specimens from 15 populations of the maize weevil into three genotypic groups, which displayed low genetic differentiation and widespread occurrence worldwide. The maize weevil and the rice weevil are each a distinct species; both of which emerged prior to the onset of agriculture. The maize-maize weevil association took place after maize became widespread as a global crop. The maize weevil populations lack spatial genetic structure at the regional, continental, and intercontinental scales.
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Affiliation(s)
- A S Corrêa
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - C C Vinson
- Departamento de Bioquímica e Biologia Molecular,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - L S Braga
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - R N C Guedes
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - L O de Oliveira
- Departamento de Bioquímica e Biologia Molecular,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
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17
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Kavallieratos NG, Athanassiou CG, Guedes RNC, Drempela JD, Boukouvala MC. Invader Competition with Local Competitors: Displacement or Coexistence among the Invasive Khapra Beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), and Two Other Major Stored-Grain Beetles? FRONTIERS IN PLANT SCIENCE 2017; 8:1837. [PMID: 29163574 PMCID: PMC5681968 DOI: 10.3389/fpls.2017.01837] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 10/10/2017] [Indexed: 05/09/2023]
Abstract
Local potential competitor species are important determinants of the invasibility of an environment even when widely recognized invasive species are concerned since it may compromise its establishment. Thus, the outcome of the direct competition among the invasive khapra beetle, Trogoderma granarium, and the cosmopolitan species lesser grain borer, Rhyzopertha dominica and rice weevil, Sitophilus oryzae, and thus the likelihood of establishment of T. granarium under their co-occurrence, was here explored in paddy rice and wheat, at temperatures between 25 and 35°C and through 200 days of storage. Insect infestations were higher in wheat rather than in paddy rice. Trogoderma granarium was unable to displace any of the competing species under two and three-species competition experiments retaining lower adult population than both local competitors at the lowest temperature level. Rhyzopertha dominica prevailed in paddy rice, while S. oryzae prevailed in wheat. Paradoxically, T. granarium adults retained low population growth but contributed more for the total frass production and grain loss, much more than that recorded for R. dominica. Nonetheless, T. granarium larvae exhibited high population numbers 130 days after the introduction of the parental individuals. At higher temperature levels (30 and 35°C) the numbers of T. granarium larvae were extremely high even after 65 days, while the numbers of the other two species rapidly declined. Interestingly, the simultaneous presence of R. dominica and S. oryzae was beneficial for the population growth of T. granarium. Consequently, T. granarium has the ability to outperform other primary stored-product insects at high temperatures, while its presence at low temperatures remains for long periods apparently unaffected by other co-occurring species. Hence, T. granarium, in wheat, is able to outcompete other major species of stored-product insects at elevated temperatures, while at 25°C this species can maintain low numbers of individuals for long periods, which can rapidly produce population outbursts when the prevailing conditions are suitable for its development.
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Affiliation(s)
- Nickolas G. Kavallieratos
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
- *Correspondence: Nickolas G. Kavallieratos,
| | - Christos G. Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, Greece
| | - Raul N. C. Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - Johanna D. Drempela
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Maria C. Boukouvala
- Laboratory of Agricultural Zoology and Entomology, Department of Crop Science, Agricultural University of Athens, Athens, Greece
- Laboratory of Organic Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
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18
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Kisfali M, Sólymos P, Nagy A, Rácz IA, Horváth O, Sramkó G. A morphometric and molecular study of the genus Pseudopodisma (Orthoptera: Acrididae). ACTA ZOOL ACAD SCI H 2017. [DOI: 10.17109/azh.63.3.293.2017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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19
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Haddi K, Oliveira EE, Faroni LRA, Guedes DC, Miranda NNS. Sublethal Exposure to Clove and Cinnamon Essential Oils Induces Hormetic-Like Responses and Disturbs Behavioral and Respiratory Responses in Sitophilus zeamais (Coleoptera: Curculionidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2015; 108:2815-2822. [PMID: 26318008 DOI: 10.1093/jee/tov255] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 08/06/2015] [Indexed: 06/04/2023]
Abstract
Essential oils have been suggested as suitable alternatives for controlling insect pests. However, the potential adaptive responses elicited in insects for mitigating the actions of these compounds have not received adequate attention. Furthermore, as is widely reported with traditional insecticides, sublethal exposure to essential oils might induce stimulatory responses or contribute to the development of resistance strategies that can compromise the management of insect pests. The current study evaluated the locomotory and respiratory responses as well as the number of larvae per grain produced by the maize weevil, Sitophilus zeamais Motschulsky, after being sublethally exposed to the essential oils of clove, Syzygium aromaticum L., and cinnamon, Cinnamomum zeylanicum L. The essential oils showed similar insecticidal toxicity (exposure route: contact with dried residues; Clove LC95 = 3.96 [2.78-6.75] µl/cm(2); Cinnamon LC95 = 3.47 [2.75-4.73] µl/cm(2)). A stimulatory effect on the median survival time (TL50) was observed when insects were exposed to low concentrations of each oil. Moreover, a higher number of larvae per grain was produced under sublethal exposure to clove essential oil. S. zeamais avoided the treated areas (in free-choice experiments) and altered their mobility when sublethally exposed to both essential oils. The respiratory rates of S. zeamais (i.e., CO2 production) were significantly reduced under low concentrations of the essential oils. We recommend the consideration of the potential sublethal effects elicited by botanical pesticides during the development of integrated pest management programs aiming to control S. zeamais.
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Affiliation(s)
- Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil. Science Without Border Associate Researcher, Programa de Pós-Graduação em Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil.
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Lêda R A Faroni
- Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Daniela C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
| | - Natalie N S Miranda
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
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20
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Gonzales Correa YDC, Faroni LRA, Haddi K, Oliveira EE, Pereira EJG. Locomotory and physiological responses induced by clove and cinnamon essential oils in the maize weevil Sitophilus zeamais. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2015; 125:31-37. [PMID: 26615148 DOI: 10.1016/j.pestbp.2015.06.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/08/2015] [Accepted: 06/09/2015] [Indexed: 06/05/2023]
Abstract
Plant essential oils have been suggested as a suitable alternative for controlling stored pests worldwide. However, very little is known about the physiological or behavioral responses induced by these compounds in insect populations that are resistant to traditional insecticides. Thus, this investigation evaluated the toxicity (including the impacts on population growth) as well as the locomotory and respiratory responses induced by clove, Syzygium aromaticum L., and cinnamon, Cinnamomum zeylanicum L., essential oils in Brazilian populations of the maize weevil Sitophilus zeamais. We used populations that are resistant to phosphine and pyrethroids (PyPhR), only resistant to pyrethroids (PyR1 and PyR2) or susceptible to both insecticide types (SUS). The PyPhR population was more tolerant to cinnamon essential oil, and its population growth rate was less affected by both oil types. Insects from this population reduced their respiratory rates (i.e., CO2 production) after being exposed to both oil types and avoided (in free choice-experiments) or reduced their mobility on essential oil-treated surfaces. The PyR1 and PyR2 populations reduced their respiratory rates, avoided (without changing their locomotory behavior in no-choice experiments) essential oil-treated surfaces and their population growth rates were severely affected by both oil types. Individuals from SUS population increased their mobility on surfaces that were treated with both oil types and showed the highest levels of susceptibility to these oils. Our findings indicate that S. zeamais populations that are resistant to traditional insecticides might have distinct but possibly overlapping mechanisms to mitigate the actions of essential oils and traditional insecticides.
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Affiliation(s)
| | - Lêda R A Faroni
- Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil.
| | - Khalid Haddi
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil; Science without Border Associate Researcher, Programa de Pós-Graduação em Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brazil
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil.
| | - Eliseu José G Pereira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-900, Brazil
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21
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Haddi K, Mendonça LP, Dos Santos MF, Guedes RNC, Oliveira EE. Metabolic and Behavioral Mechanisms of Indoxacarb Resistance in Sitophilus zeamais (Coleoptera: Curculionidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2015; 108:362-369. [PMID: 26470140 DOI: 10.1093/jee/tou049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 11/15/2014] [Indexed: 06/05/2023]
Abstract
The control of the most important pest of stored maize, the weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), is mainly achieved with the use of pyrethroid insecticides. However, the intensive use of these compounds has led to the selection of resistant populations and has compromised the control efficacy of this insect pest. Here, the toxicity of indoxacarb for a potential use in the control of S. zeamais was assessed on 13 Brazilian populations. Concentration-mortality bioassays, in the presence of synergists (piperonyl butoxide, triphenyl phosphate, and diethyl maleate), were used to assess potential metabolic-based indoxacarb resistance mechanisms. We also assessed the behavioral (locomotory) responses of these populations to indoxacarb exposure. The results showed significant differences between the populations (LD50 values ranged from 0.06 to 13.99 mg a.i/kg of grains), resulting in resistance ratios of >200-fold between the least (Canarana-MT) and the most (Espirito Santo do Pinhal-SP) susceptible populations. The results obtained with synergized indoxacarb suggest the involvement of esterases and glutathione-S-transferases on indoxacarb action, and also suggest the involvement of cytochrome P450-dependent monooxygenases as a potential indoxacarb resistance mechanism in Brazilian populations of S. zeamais. Although indoxacarb-induced behavioral avoidance varied among populations, some resistant populations (e.g., Canarana-MT) were able to reduce exposure to indoxacarb by spending more time in the nontreated areas. Collectively, our findings indicate that the behavioral (locomotory) and physiological responses of these insects may compromise the control efficacy of oxadiazine insecticides (e.g., indoxacarb) in Brazilian populations of S. zeamais.
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Affiliation(s)
- Khalid Haddi
- Science without Border Associate Researcher, Programa de Pós-Graduação em Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil. Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Larine P Mendonça
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Milaine F Dos Santos
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Raul Narciso C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil
| | - Eugênio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brasil.
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