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Mata L, Knapp RA, McDougall R, Overton K, Hoffmann AA, Umina PA. Acute toxicity effects of pesticides on beneficial organisms - Dispelling myths for a more sustainable use of chemicals in agricultural environments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172521. [PMID: 38641095 DOI: 10.1016/j.scitotenv.2024.172521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 04/11/2024] [Accepted: 04/14/2024] [Indexed: 04/21/2024]
Abstract
Agricultural practitioners, researchers and policymakers are increasingly advocating for integrated pest management (IPM) to reduce pesticide use while preserving crop productivity and profitability. Using selective pesticides, putatively designed to act on pests while minimising impacts on off-target organisms, is one such option - yet evidence of whether these chemicals control pests without adversely affecting natural enemies and other beneficial species (henceforth beneficials) remains scarce. At present, the selection of pesticides compatible with IPM often considers a single (or a limited number of) widely distributed beneficial species, without considering undesired effects on co-occurring beneficials. In this study, we conducted standardised laboratory bioassays to assess the acute toxicity effects of 20 chemicals on 15 beneficial species at multiple exposure timepoints, with the specific aims to: (1) identify common and diverging patterns in acute toxicity responses of tested beneficials; (2) determine if the effect of pesticides on beetles, wasps and mites is consistent across species within these groups; and (3) assess the impact of mortality assessment timepoints on International Organisation for Biological Control (IOBC) toxicity classifications. Our work demonstrates that in most cases, chemical toxicities cannot be generalised across a range of beneficial insects and mites providing biological control, a finding that was found even when comparing impacts among closely related species of beetles, wasps and mites. Additionally, we show that toxicity impacts increase with exposure length, pointing to limitations of IOBC protocols. This work challenges the notion that chemical toxicities can be adequately tested on a limited number of 'representative' species; instead, it highlights the need for careful consideration and testing on a range of regionally and seasonally relevant beneficial species.
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Affiliation(s)
- Luis Mata
- Cesar Australia, 95 Albert Street, Brunswick 3056, Victoria, Australia; School of Agriculture, Food and Ecosystem Sciences, The University of Melbourne, 500 Yarra Boulevard, Richmond 3121, Victoria, Australia.
| | - Rosemary A Knapp
- Cesar Australia, 95 Albert Street, Brunswick 3056, Victoria, Australia
| | - Robert McDougall
- Cesar Australia, 95 Albert Street, Brunswick 3056, Victoria, Australia
| | - Kathy Overton
- Cesar Australia, 95 Albert Street, Brunswick 3056, Victoria, Australia
| | - Ary A Hoffmann
- Bio21 Institute, School of BioSciences, The University of Melbourne, 30 Flemington Road, Parkville 3052, Victoria, Australia
| | - Paul A Umina
- Cesar Australia, 95 Albert Street, Brunswick 3056, Victoria, Australia; Bio21 Institute, School of BioSciences, The University of Melbourne, 30 Flemington Road, Parkville 3052, Victoria, Australia.
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Matos MC, Silva FWB, Filgueiras RMC, Lima DB, Melo JWS. Compatibility of pesticides with the predatory mite Neoseiulus barkeri. EXPERIMENTAL & APPLIED ACAROLOGY 2024; 92:27-39. [PMID: 37985607 DOI: 10.1007/s10493-023-00865-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/09/2023] [Indexed: 11/22/2023]
Abstract
Multiple arthropod pests can affect the same crop in agricultural systems, requiring the integration of control methods. In the present study, the effects of residual exposure to four broad-spectrum insecticides/acaricides (azadiractin, abamectin, chlorfenapyr, and fenpyroximate) on immature (development and survival time) and adult females (longevity, fecundity, and fertility life table parameters) of the predatory mite Neoseiulus barkeri were evaluated. Additionally, the insecticides/acaricides were categorized according to their selectivity based on the classification proposed by the International Organization for Biological Control (IOBC) for assessing the susceptibility of arthropods in laboratory experiments. Method 004, proposed by the Insecticide Resistance Action Committee (IRAC), was adopted for the bioassays with predators exposed to insecticide-acaricide residues. Among the insecticides/acaricides studied, azadirachtin had minimal effects on immature and adult N. barkeri (all non-significant) and was considered harmless based on the classification of toxicity according to the standards/categories proposed by the IOBC. All other insecticides/acaricides affected immature and adult N. barkeri and were considered slightly harmful in terms of toxicity, according to the IOBC.
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Affiliation(s)
- Mateus C Matos
- Departamento de Fitotecnia - Agronomia, Universidade Federal do Ceará, Av. Mister Hull, Fortaleza, CE, 60356-001, Brazil
| | - Francisco W B Silva
- Departamento de Fitotecnia - Agronomia, Universidade Federal do Ceará, Av. Mister Hull, Fortaleza, CE, 60356-001, Brazil
| | - Rosenya M C Filgueiras
- Departamento de Fitotecnia - Agronomia, Universidade Federal do Ceará, Av. Mister Hull, Fortaleza, CE, 60356-001, Brazil
| | - Debora B Lima
- Departamento de Zoologia - Centro de Biociência, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, Recife, PE, 50670-420, Brazil
| | - Jose W S Melo
- Departamento de Zoologia - Centro de Biociência, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego, Recife, PE, 50670-420, Brazil.
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de Morais MR, Innocente LCP, Zanardi OZ, de Andrade DJ. Occurrence of Tegolophus brunneus and Phyllocoptruta oleivora (Acari: Eriophyidae) on the main citrus belt of Brazil and the differential toxicity of the acaricides to these species. EXPERIMENTAL & APPLIED ACAROLOGY 2023; 91:603-613. [PMID: 37995027 DOI: 10.1007/s10493-023-00870-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/14/2023] [Indexed: 11/24/2023]
Abstract
Many mites of the family Eriophyidae are important pests worldwide. In citrus crops, the eriophyid Phyllocoptruta oleivora stands out for the economic losses caused. The pest's injuries cause the darkening of leaves, twigs, and fruits, making them unfit for the fresh fruit market and affecting plant productivity. Another species that causes similar symptoms was described in Brazil recently, the brown citrus rust mite, Tegolophus brunneus. Although studies have not been performed with this species, growers and technicians have attributed the rise in rust damages in Brazil to T. brunneus, affirming that this mite is more aggressive and resistant to acaricides than P. oleivora. In this study, the distribution of T. brunneus in the main Brazilian citrus belt and the differential toxicity of the acaricides sulfur and abamectin were evaluated for both species. Infested fruits were collected from different orchards in many municipalities, covering the main citrus species and cultivars grown, aiming to show the main T. brunneus hosts. It was observed that only plants of Tahiti acid lime (Citrus latifolia) were infested by T. brunneus, whereas P. oleivora infested all citrus cultivars and species evaluated (Citrus spp.). In our study, T. brunneus and P. oleivora were never observed coinfesting the same fruit/leaf or plant. The acute toxicity test of sulfur and abamectin as acaricides showed that T. brunneus has greater tolerance to abamectin than P. oleivora. However, the acute toxicity of sulfur was similar for both species. These results showed T. brunneus specificity to infest Tahiti acid lime, causing important damage to this crop, and suggest that attention should be paid to managing this mite using abamectin.
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Affiliation(s)
- Matheus Rovere de Morais
- Laboratory of Acarology (AcaroLab), School of Agricultural and Veterinarian Sciences (FCAV-Unesp), São Paulo State University, Via de Acesso Prof. Paulo Donato Castellane s/nº, Jaboticabal, CEP 14884-900, SP, Brazil
| | - Leticia Caroline Penteado Innocente
- Laboratory of Acarology (AcaroLab), School of Agricultural and Veterinarian Sciences (FCAV-Unesp), São Paulo State University, Via de Acesso Prof. Paulo Donato Castellane s/nº, Jaboticabal, CEP 14884-900, SP, Brazil
| | - Odimar Zanuzo Zanardi
- Department of Education, Research, and Extension, Federal Institute of Santa Catarina (IFSC), São Miguel Do Oeste, Santa Catarina, Brazil
| | - Daniel Júnior de Andrade
- Laboratory of Acarology (AcaroLab), School of Agricultural and Veterinarian Sciences (FCAV-Unesp), São Paulo State University, Via de Acesso Prof. Paulo Donato Castellane s/nº, Jaboticabal, CEP 14884-900, SP, Brazil.
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Ayed-Boussema I, Rjiba-Touati K, Hamdi H, Chaabani H, Abid-Essefi S. Oxidative stress-mediated mitochondrial apoptosis induced by the acaricide, fenpyroximate, on cultured human colon cancer HCT 116 cells. Toxicol In Vitro 2023; 89:105587. [PMID: 36933581 DOI: 10.1016/j.tiv.2023.105587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/02/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023]
Abstract
Fenpyroximate (FEN) is an acaricide that inhibits mitochondrial electron transport at the NADH-coenzyme Q oxidoreductase (complex I). The present study was designed to investigate the molecular mechanisms underling FEN toxicity on cultured human colon carcinoma cells (HCT116). Our data showed that FEN induced HCT116 cell mortality in a concentration dependent manner. FEN arrested cell cycle in G0/G1 phase and increased DNA damage as assessed by comet assay. Induction of apoptosis was confirmed in HCT116 cells exposed to FEN by AO-EB staining and Annexin V-FITC/PI double staining assay. Moreover, FEN induced a loss in mitochondrial membrane potential (MMP), increased p53 and Bax mRNA expression and decreased bcl2 mRNA level. An increase in caspase 9 and caspase 3 activities was also detected. All toghether, these data suggest that FEN induce apoptosis in HCT116 cells via mitochondrial pathway. To check the implication of oxidative stress in FEN-induced cell toxicity, we examined the oxidative stress statue in HCT116 cells exposed to FEN and we tested the effect of a powerful antioxidant, N-acetylcystein (NAC), on FEN-caused toxicity. It was observed that FEN enhanced ROS generation and MDA levels and disturbed SOD and CAT activities. Besides, cell treatment with NAC significantly protected cells from mortality, DNA damage, loss of MMP, and caspase 3 activity induced by FEN. To the best of our knowledge, this is the first study showing that FEN induced mitochondrial apoptosis via ROS generation and oxidative stress.
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Affiliation(s)
- Imen Ayed-Boussema
- Laboratory of Research on Biologically Compatible Compounds, LR01SE17 University of Monastir, Faculty of Dental Medicine, 5019 Monastir, Tunisia; Faculty of Sciences of Gafsa, University of Gafsa, Tunisia.
| | - Karima Rjiba-Touati
- Laboratory of Research on Biologically Compatible Compounds, LR01SE17 University of Monastir, Faculty of Dental Medicine, 5019 Monastir, Tunisia; Faculty of Sciences of Gafsa, University of Gafsa, Tunisia
| | - Hiba Hamdi
- Laboratory of Research on Biologically Compatible Compounds, LR01SE17 University of Monastir, Faculty of Dental Medicine, 5019 Monastir, Tunisia
| | - Hanen Chaabani
- Laboratory of Research on Biologically Compatible Compounds, LR01SE17 University of Monastir, Faculty of Dental Medicine, 5019 Monastir, Tunisia
| | - Salwa Abid-Essefi
- Laboratory of Research on Biologically Compatible Compounds, LR01SE17 University of Monastir, Faculty of Dental Medicine, 5019 Monastir, Tunisia
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Ferreira JA, Almeida GB, Lins PMP, Tavares MM, Farias SCC, Queiroz SCN. Study of insecticide translocation in coconut palm trees after using pressurized endotherapy. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:4851-4860. [PMID: 36398780 DOI: 10.1039/d2ay01328b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Alternative techniques for applying agricultural products, such as pressurized endotherapy, have shown promise in pest and disease control in coconut palms (Cocos nucifera Linn.). In this work, azadirachtin and abamectin were applied by pressurized endotherapy to control Brassolis sophorae. Twelve different treatments were carried out, and in all of them, at least one plant had the larvae completely dead four and five days after endotherapeutic applications, and all the others died within the next few hours. Leaf and fruit analyses were performed to determine the concentration over time. High concentrations of abamectin were observed after 15 and 30 days on leaves when applied in larger volumes. In fruits, no residue was found regardless of the applied concentration. Analytical methods were developed and validated for leaves and fruits to analyze insecticide residues using LC-MS/MS and modified QuEChERS acetate according to SANTE/11813/2017 guidelines. The insecticide translocation tests in the leaves and the high mortality of insects showed that pressurized endotherapy is a technique to be considered for future studies in controlling B. sophorae in coconut palm trees.
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Affiliation(s)
- Jordana Alves Ferreira
- Laboratory of Residues and Contaminants, Embrapa Environment, Rodovia SP 340, km 127.5, 13918-110, Jaguariúna, SP, Brazil.
| | - Gabriela Brito Almeida
- Laboratory of Residues and Contaminants, Embrapa Environment, Rodovia SP 340, km 127.5, 13918-110, Jaguariúna, SP, Brazil.
| | | | - Marley Mendonça Tavares
- Laboratory of Residues and Contaminants, Embrapa Environment, Rodovia SP 340, km 127.5, 13918-110, Jaguariúna, SP, Brazil.
| | | | - Sonia C N Queiroz
- Laboratory of Residues and Contaminants, Embrapa Environment, Rodovia SP 340, km 127.5, 13918-110, Jaguariúna, SP, Brazil.
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Musa A, Međo I, Marić I, Marčić D. Transovarial toxicity matters: lethal and sublethal effects of hexythiazox on the two-spotted spider mite (Acari: Tetranychidae). EXPERIMENTAL & APPLIED ACAROLOGY 2022; 87:175-194. [PMID: 35867194 DOI: 10.1007/s10493-022-00733-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 07/08/2022] [Indexed: 06/15/2023]
Abstract
The effects of hexythiazox on life-history traits and demographic parameters of Tetranychus urticae Koch (Acari: Tetranychidae) were evaluated using the age-stage two-sex life table (in fecundity-based and fertility-based variants), with emphasis on its transovarial toxicity. Hexythiazox was applied when T. urticae females were either in the preovipositional period or in the first day of oviposition. In the F0 generation bioassay, treatments with concentrations of 50, 12.5 and 3.125 mg/l significantly reduced the longevity of females and their fecundity. These effects were mostly the result of mortality of treated females (18-23%) over the 24-h exposure period. Even though the net reproductive rate (R0) decreased significantly, the intrinsic rate of increase (r), finite rate of increase (λ) and doubling time (D) were not significantly different from the control. The strongest transovarial toxic effect occurred within the first 4 days following treatment, when 52-89% of the eggs laid by treated females (96% in control) hatched. Fertility was significantly reduced by concentrations of 50, 12.5, 3.125, 0.781 and 0.195 mg/l. These concentrations caused significant reductions in R0 (34-54%), r (12-24%) and λ (3-5%), whereas D was extended for 0.4-0.7 days. In the F1 generation bioassay, 50, 12.5, 3.125, 0.781, 0.049 and 0.012 mg/l caused significant reductions in R0 (34-92%), r (10-68%) and λ (3-17%), whereas extending D for 0.3-5.6 days. These effects were mostly the consequence of transovarial toxicity. Application of the fecundity-based life table underestimated population-level effects of hexythiazox on T. urticae.
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Affiliation(s)
- Asma Musa
- Laboratory of Applied Entomology, Institute of Pesticides and Environmental Protection, Banatska 31B, P.O. Box 163, 11080, Belgrade, Serbia
- Faculty of Biology, University of Belgrade, Studentski trg 16, 11000, Belgrade, Serbia
| | - Irena Međo
- Laboratory of Applied Entomology, Institute of Pesticides and Environmental Protection, Banatska 31B, P.O. Box 163, 11080, Belgrade, Serbia
| | - Ivana Marić
- Laboratory of Applied Entomology, Institute of Pesticides and Environmental Protection, Banatska 31B, P.O. Box 163, 11080, Belgrade, Serbia
| | - Dejan Marčić
- Laboratory of Applied Entomology, Institute of Pesticides and Environmental Protection, Banatska 31B, P.O. Box 163, 11080, Belgrade, Serbia.
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Janssen A, Fonseca MM, Marcossi I, Kalile MO, Cardoso AC, Walerius AH, Hanel A, Marques V, Ferla JJ, Farias V, Carbajal PAF, Pallini A, Nachman G. Estimating intrinsic growth rates of arthropods from partial life tables using predatory mites as examples. EXPERIMENTAL & APPLIED ACAROLOGY 2022; 86:327-342. [PMID: 35286552 PMCID: PMC8967767 DOI: 10.1007/s10493-022-00701-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
The intrinsic rate of natural increase of a population (rm) has been in focus as a key parameter in entomology and acarology. It is considered especially important in studies of predators that are potential biological control agents of fast-growing pests such as mites, whiteflies and thrips. Life-table experiments under controlled laboratory conditions are standard procedures to estimate rm. However, such experiments are often time consuming and may critically depend on the precise assessment of the developmental time and the fecundity rate early in the reproductive phase. Using selected studies of predatory mites with suitable life-table data, we investigated whether and how measurements of growth rates can be simplified. We propose a new method for estimating rm from partial life tables, in which the researcher can choose a level of precision based on a stand-in measure of relative error. Based on this choice, the procedure helps the researcher to decide when a life-table experiment can be terminated. Depending on the chosen precision, significant amounts of experimental time can be saved without seriously compromising the reliability of the estimated growth parameter.
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Affiliation(s)
- Arne Janssen
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
- Evolutionary and Population Biology, IBED, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | | | - Italo Marcossi
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | | | - Andre Costa Cardoso
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | | | - Aldo Hanel
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Vinicius Marques
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Júlia Jantsch Ferla
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Vanessa Farias
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Paola A. F. Carbajal
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Angelo Pallini
- Department of Entomology, Federal University of Viçosa, Viçosa, Minas Gerais Brazil
| | - Gösta Nachman
- Department of Biology, Section of Ecology and Evolution, University of Copenhagen, Copenhagen, Denmark
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Barroso G, Pazini JB, Iost Filho FH, Barbosa DPL, de Paiva ACR, Matioli TF, Yamamoto PT. Are Pesticides Used to Control Thrips Harmonious with Soil-Dwelling Predatory Mite Cosmolaelaps sabelis (Mesostigmata: Laelapidae)? JOURNAL OF ECONOMIC ENTOMOLOGY 2022; 115:151-159. [PMID: 34791336 DOI: 10.1093/jee/toab219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Edaphic predatory mites could be introduced in pest management programs of pests that live, or spend part of their life cycle, in the soil. Some mesostigmatic mites have been widely used for the management of different species of thrips (Thysanoptera), especially in protected cultivation. The edaphic predator Cosmolaelaps sabelis (Mesostigmata: Laelapidae) was a model species in this study, being exposed to the most applied insecticides for the control of thrips in Brazil. After lethal, sublethal and transgenerational effects were evaluated. The pesticides acephate, acetamiprid + etofenprox, azadirachtin, spinetoram, formetanate hydrochloride, and imidacloprid were classified according to the IOBC/WPRS (International Organization for Biological Control-West Paleartic Regional Section) recommendation, considering the acute toxicity and the effects on adult females' reproduction, in the maternal and first generation. The pesticides acetamiprid + etofenprox and azadirachtin were classified as slightly harmful (Class 2), while spinetoram was classified as moderately harmful (Class 3). Acephate and formetanate hydrochloride were classified as harmful (Class 4). Only imidacloprid didn't cause negative effects on the females. Regarding effects on the first generation, acetamiprid + etofenprox, azadirachtin, and spinetoram caused reduction in the oviposition rates. Therefore, we suggest that complimentary bioassays should be done under semi-field and field conditions using the pesticides that were considered harmful in this study, to assess their effects on this predator in other environments prior to recommending not to use them in integrated programs to manage soil-based pests using chemical and biological tools.
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Affiliation(s)
- G Barroso
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - J B Pazini
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - F H Iost Filho
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - D P L Barbosa
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - A C R de Paiva
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - T F Matioli
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - P T Yamamoto
- Department of Entomology and Acarology, University of São Paulo, Piracicaba, São Paulo, Brazil
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Duso C, Van Leeuwen T, Pozzebon A. Improving the compatibility of pesticides and predatory mites: recent findings on physiological and ecological selectivity. CURRENT OPINION IN INSECT SCIENCE 2020; 39:63-68. [PMID: 32330876 DOI: 10.1016/j.cois.2020.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 03/15/2020] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
Integrated pest management relies upon the application of selective pesticides that do not hinder biological control. Phytoseiid mites represent an interesting case-study: they are amongst the most frequently used biological control agents and often are less affected by pesticides than their prey by natural tolerance or by developing resistance. The selectivity of a pesticide is determined by physiological processes that include metabolism, transport, and the affinity to the target-site. Genomic and transcriptomic studies start to elucidate the genetic and molecular mechanisms of differential toxicity in some phytoseiid species, such as a mutation in the sodium channel conferring pyrethroid resistance. Ecological selectivity is achieved by smart applications of pesticides and management practices that influence the persistence of phytoseiid mites on plants. Although modern pesticides often show lower acute toxicity, there is a need for robust assays and procedures that quantify lethal and sublethal effects, through different routes and times of exposure.
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Affiliation(s)
- Carlo Duso
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, 35020 Legnaro (PD), Italy.
| | - Thomas Van Leeuwen
- Department of Plants and Crops, Faculty of Bio-Science Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Alberto Pozzebon
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, 35020 Legnaro (PD), Italy
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Duarte ADF, de Bastos Pazini J, Duarte JLP, da Silva LR, da Cunha US. Compatibility of pesticides used in strawberry crops with predatory mites Stratiolaelaps scimitus (Womersley) and Cosmolaelaps brevistilis (Karg). ECOTOXICOLOGY (LONDON, ENGLAND) 2020; 29:148-155. [PMID: 31927677 DOI: 10.1007/s10646-020-02164-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/05/2020] [Indexed: 06/10/2023]
Abstract
Stratiolaelaps scimitus (Womersley) and Cosmolaelaps brevistilis (Karg) (Acari: Laelapidae) are predatory mites of soil-inhabiting pests, mainly small insects. Fungus gnats fly species are found in greenhouse strawberry production and may be controlled with predatory mites, being important to know their compatibility with the pesticides used in strawberry crops. In this study, the compatibility of seven commercial pesticides used in strawberry cultivation with the predatory mites S. scimitus and C. brevistilis was assessed in laboratory conditions. Survival and oviposition rates were evaluated between 0.5 and 120 h after treatment (HAT). The results demonstrate that lambda-cyhalothrin treatment resulted in the lowest survival rate for both mites in the first evaluations, being moderately harmful, while spinetoran was slightly harmful to C. brevistilis. On the other hand, abamectin, azadirachtin, azoxystrobin + difenoconazole, iprodione and thiamethoxam were harmless for both mites and, oviposition rate was significantly different only at 72 and 120 HAT for S. scimitus and C. brevistilis respectively. These results may be used to develop guidelines for the adoption of selective pesticides in integrated pest management programs that conserves predatory mites.
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Affiliation(s)
- Adriane da F Duarte
- Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, 96001-970, Brazil.
| | - Juliano de Bastos Pazini
- Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, 96001-970, Brazil
| | - Juliano Lessa Pinto Duarte
- Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, 96001-970, Brazil
| | - Lucas Raphael da Silva
- Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, 96001-970, Brazil
| | - Uemerson Silva da Cunha
- Departamento de Fitossanidade, Faculdade de Agronomia Eliseu Maciel (FAEM), Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, 96001-970, Brazil
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Monteiro VB, Lima DB, Melo JWS, Guedes RNC, Gondim MGC. Acaricide-Mediated Colonization of Mite-Infested Coconuts by the Predatory Phytoseiid Neoseiulus baraki (Acari: Phytoseiidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:213-218. [PMID: 30272181 DOI: 10.1093/jee/toy291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Indexed: 06/08/2023]
Abstract
Walking is important to dispersal on plants and colonization of new plants by predatory mites, and this activity is potentially affected by the presence of acaricides. This possibility was investigated in coconut fruits infested with the coconut mite, Aceria guerreronis Keifer (Acari: Eriophyidae), where colonization by the predator Neoseiulus baraki (Athias-Henriot) (Acari: Phytoseiidae) was monitored. The following acaricides were evaluated for influence on the process of colonization by the predatory mite: abamectin, azadirachtin, and fenpyroximate. Water-treated fruits were used for comparison. Experiments were conducted with and without freedom of choice on coconut fruits with the release and recapture of females of N. baraki marked with fluorescent ink. A confinement experiment was also carried out on coconut bunch rachis sprayed or not sprayed with the acaricides. The predatory mite N. baraki avoided contact with acaricide-contaminated areas. After the predators were released on the fruits or bunch rachis, larger numbers were recaptured under the bracts than on the surface of the fruits. The number of predators recaptured in all experiments was lower in the treatments with acaricides than in the control. Among the acaricides tested, azadirachtin least affected N. baraki colonization. Therefore, the presence of the tested acaricides indeed interferes with N. baraki dispersal within plants and the coconut fruit colonization.
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Affiliation(s)
- Vaneska B Monteiro
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, Brazil
| | - Debora B Lima
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, Brazil
| | - José W S Melo
- Departamento de Fitotecnia - Entomologia, Universidade Federal do Ceará, Campus do Pici, Av. Mister Hull, Fortaleza, CE, Brazil
| | - Raul Narciso C Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil
- USDA-ARS San Joaquin Valley Agricultural Sciences Center, Parlier, CA
| | - Manoel G C Gondim
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Av. Dom Manoel de Medeiros s/n, Dois Irmãos, Recife, PE, Brazil
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Monteiro VB, Silva VF, Lima DB, Guedes RNC, Gondim MGC. Pesticides and passive dispersal: acaricide- and starvation-induced take-off of the predatory mite Neoseiulus baraki. PEST MANAGEMENT SCIENCE 2018; 74:1272-1278. [PMID: 29316207 DOI: 10.1002/ps.4851] [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: 08/03/2017] [Revised: 12/14/2017] [Accepted: 12/31/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND An understanding of the causes and consequences of dispersal is vital for managing populations. Environmental contaminants, such as pesticides, provide potential environmental context-dependent stimuli for dispersal of targeted and non-targeted species, which may occur not only for active but also for passive dispersal, although such a possibility is frequently neglected. Here, we assessed the potential of food deprivation and acaricides to interfere with the take-off for passive (wind) dispersal of the predatory mite Neoseiulus baraki. RESULTS Wind tunnel bioassays indicated that starvation favoured the take-off for wind dispersal by the mite predator, which also varied with wind velocity, and dispersal increased at higher velocities within the 1-7 (m s-1 ) range tested. For the acaricides tested, particularly the biopesticide azadirachtin but also abamectin and fenpyroximate, the rate of predator take-off for dispersal increased, and further increased with wind velocity up to 7 m/s. Such responses were associated with changes in the predator behavioural preparation for wind-mediated passive dispersal, with a greater incidence of the standing posture that permitted take-off. CONCLUSION The rate of take-off for passive dispersal by N. baraki increased with food deprivation and exposure to the residues of agricultural acaricides. Azadirachtin exposure resulted in a particularly strong response, although abamectin and fenpyroximate also stimulated dispersal. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Vaneska Barbosa Monteiro
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Recife, Brazil
| | - Vanessa Farias Silva
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Recife, Brazil
| | - Debora Barbosa Lima
- Departamento de Agronomia - Entomologia, Universidade Federal Rural de Pernambuco, Recife, Brazil
| | - Raul Narciso Carvalho Guedes
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, Brazil
- USDA-ARS San Joaquin Valley Agricultural Sciences Center, Parlier, CA, USA
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Dai H, Ge S, Guo J, Chen S, Huang M, Yang J, Sun S, Ling Y, Shi Y. Development of novel bis-pyrazole derivatives as antitumor agents with potent apoptosis induction effects and DNA damage. Eur J Med Chem 2018; 143:1066-1076. [DOI: 10.1016/j.ejmech.2017.11.098] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 11/27/2017] [Accepted: 11/29/2017] [Indexed: 12/21/2022]
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Oliveira NNFC, Galvão AS, Amaral EA, Santos AWO, Sena-Filho JG, Oliveira EE, Teodoro AV. Toxicity of vegetable oils to the coconut mite Aceria guerreronis and selectivity against the predator Neoseiulus baraki. EXPERIMENTAL & APPLIED ACAROLOGY 2017; 72:23-34. [PMID: 28493037 DOI: 10.1007/s10493-017-0134-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 05/01/2017] [Indexed: 05/26/2023]
Abstract
The coconut mite, Aceria guerreronis (Acari: Eriophyidae), is a major tropical pest of coconut. Here, we assessed the chemical profiles and the potential use of babassu, degummed soybean, and coconut oils to control A. guerreronis as well as their side-effects on the predatory mite Neoseiulus baraki (Acari: Phytoseiidae), a key natural enemy of the coconut mite. Babassu and coconut oils had similar fatty acids chemical profiles. All vegetable oils showed toxicity to A. guerreronis; degummed soybean oil exhibited the highest toxicity (LC50 = 0.15 µL/cm2). Although all oils were less toxic to N. baraki, their potential to attract/repel this predatory mite differed. Whereas N. baraki females were unresponsive to coconut oil at both concentrations (i.e., LC50 and LC99 estimated for A. guerreronis), irrespective of exposure period (i.e., 1 or 24 h), the babassu oil repelled the predator, independent of exposure period, when applied at its LC99 (1.48 µL/cm2). Intriguingly, this oil also exhibited attractiveness to N. baraki 24 h after exposure when applied at its LC50 (0.26 µL/cm2). A similar attractiveness pattern was recorded 24 h after N. baraki was exposed to degummed soybean oil at both concentrations tested (LC50 = 0.15 µL/cm2; LC99 = 1.39 µL/cm2). However, N. baraki was repelled by degummed soybean oil at its LC50 after 1 h of exposure. Therefore, the present study demonstrated that all the vegetable oils used here had higher toxicity to the coconut mite and considerable selectivity to the predator N. baraki, indicating they are promising tools that can potentially be included in management programs to control A. guerreronis in commercial coconut plantations.
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Affiliation(s)
- Natália N F C Oliveira
- Programa de Pós-Graduação em Agroecologia, Universidade Estadual do Maranhão, Cidade Universitária Paulo VI, Tirirical, São Luís, MA, 65054-970, Brazil
| | - Andreia S Galvão
- Instituto Federal do Maranhão, Campus São Luís-Maracanã, Av. Curiós, s/n, Caixa Postal 433, São Luís, MA, Brazil
| | - Ester A Amaral
- Universidade Estadual do Maranhão, Cidade Universitária Paulo VI, Tirirical, São Luís, MA, 65054-970, Brazil
| | - Auderes W O Santos
- Instituto Federal do Maranhão, Campus Barreirinhas-Santa Cruz, Barreirinhas, MA, 65590-000, Brazil
| | - José G Sena-Filho
- Embrapa Tabuleiros Costeiros, Av. Beira mar, 3250, Aracaju, SE, 49025-040, Brazil
| | - Eugenio E Oliveira
- Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-900, Brazil
| | - Adenir V Teodoro
- Embrapa Tabuleiros Costeiros, Av. Beira mar, 3250, Aracaju, SE, 49025-040, Brazil.
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