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Al.Jubouri RAA. Seasonal abundance and population density of Chaitophorus populialbae on euphratica poplar trees in Iraq. INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021 2023. [DOI: 10.1063/5.0114871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Salgado-Neto G, Vaz MAB, Guedes JVC, Muniz MFB, Blume E, Wilcken CF, Castro BMDCE, Plata-Rueda A, Zanuncio JC. Dispersion of the soybean root rot by Cycloneda sanguinea (Coleoptera: Coccinellidae). Sci Rep 2018; 8:2409. [PMID: 29402912 PMCID: PMC5799320 DOI: 10.1038/s41598-018-20587-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 01/10/2018] [Indexed: 11/24/2022] Open
Abstract
The dispersion of pathogenic microorganisms consists of the transport of pathogens from their source to inoculate a new host. Agricultural and economic importance of the Soybean root rot justifies studying this disease, especially the role of insects as dispersers. The aim of this study was to evaluate the role of the ladybird beetle, Cycloneda sanguinea Linnaeus (Coleoptera: Coccinellidae) in the dispersion of pathogens that cause Soybean root rot. Three pathogen species, Macrophomina phaseolina (Tassi) (Sphaeropsidales: Botryosphaeriaceae), Fusarium incarnatum-equiseti species complex (FIESC), and F. commune (Skovgaard) O'Donnell & Nirenberg were isolated from the midgut of ladybird beetles and cultured. Macrophomina phaseolina was identified by morphology while for the other two species, DNA was sequenced. The DNA extracted was amplified in the Internal Transcriber Spacer (ITS) region, sequenced and compared to voucher sequences deposited in the GenBank. Sequences of nucleotide ITS1-5.8 S were identified in the regions of rDNA-ITS4 ribosomal DNA. This is the first report of Macrophomina phaseolina (Tassi) (Sphaeropsidales: Botryosphaeriaceae), Fusarium incarnatum-equiseti species complex (FIESC), and F. commune (Skovgaard) O'Donnell & Nirenberg, being dispersed by C. sanguinea in Brazilian soybean fields.
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Affiliation(s)
- Geraldo Salgado-Neto
- Departamento de Defesa Fitossanitária, Universidade Federal de Santa Maria, Santa Maria, 97105-900, Brazil
| | - Marcos André Braz Vaz
- Departamento de Estatística, Universidade Federal de Santa Maria, Santa Maria, 97105-900, Brazil
| | | | - Marlove Fátima Brião Muniz
- Departamento de Defesa Fitossanitária, Universidade Federal de Santa Maria, Santa Maria, 97105-900, Brazil
| | - Elena Blume
- Departamento de Defesa Fitossanitária, Universidade Federal de Santa Maria, Santa Maria, 97105-900, Brazil
| | - Carlos Frederico Wilcken
- Departamento de Proteção de Plantas, Escola de Ciências Agronômicas, Universidade Estadual Paulista, 18603-970, Botucatu, Brazil
| | | | - Angelica Plata-Rueda
- Departamento de Entomologia, Universidade Federal de Viçosa, Rio Paranaíba, 38810-000, Brazil
| | - José Cola Zanuncio
- Departamento de Entomologia/BIOAGRO, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil.
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Fernandes FS, Godoy WAC, Ramalho FS, Garcia AG, Santos BDB, Malaquias JB. Population dynamics of Aphis gossypii Glover and in sole and intercropping systems of cotton and cowpea. AN ACAD BRAS CIENC 2018; 90:311-323. [PMID: 29424383 DOI: 10.1590/0001-3765201720150557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 05/04/2016] [Indexed: 11/21/2022] Open
Abstract
Population dynamics of aphids have been studied in sole and intercropping systems. These studies have required the use of more precise analytical tools in order to better understand patterns in quantitative data. Mathematical models are among the most important tools to explain the dynamics of insect populations. This study investigated the population dynamics of aphids Aphis gossypii and Aphis craccivora over time, using mathematical models composed of a set of differential equations as a helpful analytical tool to understand the population dynamics of aphids in arrangements of cotton and cowpea. The treatments were sole cotton, sole cowpea, and three arrangements of cotton intercropped with cowpea (t1, t2 and t3). The plants were infested with two aphid species and were evaluated at 7, 14, 28, 35, 42, and 49 days after the infestations. Mathematical models were used to fit the population dynamics of two aphid species. There were good fits for aphid dynamics by mathematical model over time. The highest population peak of both species A. gossypii and A. craccivora was found in the sole crops, and the lowest population peak was found in crop system t2. These results are important for integrated management programs of aphids in cotton and cowpea.
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Affiliation(s)
- Francisco S Fernandes
- Unidade de Controle Biológico, Embrapa Algodão, Av. Osvaldo Cruz, 1143, Centenário, 58428-095 Campina Grande, PB, Brazil.,Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Entomologia, Rua Pádua Dias, 11, 13418-900 Piracicaba, SP, Brazil
| | - Wesley A C Godoy
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Entomologia, Rua Pádua Dias, 11, 13418-900 Piracicaba, SP, Brazil
| | - Francisco S Ramalho
- Unidade de Controle Biológico, Embrapa Algodão, Av. Osvaldo Cruz, 1143, Centenário, 58428-095 Campina Grande, PB, Brazil
| | - Adriano G Garcia
- Escola Superior de Agricultura "Luiz de Queiroz", Departamento de Entomologia, Rua Pádua Dias, 11, 13418-900 Piracicaba, SP, Brazil
| | - Bárbara D B Santos
- Unidade de Controle Biológico, Embrapa Algodão, Av. Osvaldo Cruz, 1143, Centenário, 58428-095 Campina Grande, PB, Brazil
| | - José B Malaquias
- Unidade de Controle Biológico, Embrapa Algodão, Av. Osvaldo Cruz, 1143, Centenário, 58428-095 Campina Grande, PB, Brazil
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Marchioro CA, Krechemer FS, Foerster LA. Estimating the development rate of the tomato leaf miner, Tuta absoluta (Lepidoptera: Gelechiidae), using linear and non-linear models. PEST MANAGEMENT SCIENCE 2017; 73:1486-1493. [PMID: 27860137 DOI: 10.1002/ps.4484] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 11/10/2016] [Accepted: 11/10/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Tuta absoluta Meyrick (Lepidoptera: Gelechiidae) is native to South America and has recently invaded European, African and Asian countries, where it is causing severe damage to tomato crops leading to an increase in the number of insecticide applications. This situation has prompted a demand for alternative pest management strategies aiming to control T. absoluta and concomitantly reduce insecticide applications. The development period for immature stages of T. absoluta at constant temperatures was modelled to select appropriate mathematical functions for simulating its development. RESULTS The performance of the models varied according to the insect development stage, but in general all models performed well considering the statistical criteria used. Discrimination among models was possible only when the reliability of the temperature thresholds estimated by the models was used as an additional criterion. In this case, the models Briere-1, Lactin-2 and Shi proved adequate to describe the relationship between temperature and development rate of T. absoluta. CONCLUSION These models provide an important tool to predict the occurrence of the immature stages of T. absoluta in the field in order to determine the best period for implementing control measures. This is an important contribution to the development of pest management strategies for T. absoluta. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Cesar A Marchioro
- Department of Agriculture, Biodiversity and Forest, Centre of Rural Sciences, Campus Curitibanos, Universidade Federal de Santa Catarina, Curitibanos, Santa Catarina, Brazil
| | - Flavia S Krechemer
- Centre of Rural Sciences, Campus Curitibanos, Universidade Federal de Santa Catarina, Curitibanos, Santa Catarina, Brazil
| | - Luis A Foerster
- Department of Zoology, Universidade Federal do Paraná, Curitiba, Paraná, Brazil
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Ramalho FS, Malaquias JB, Lira ACS, Oliveira FQ, Zanuncio JC, Fernandes FS. Temperature-Dependent Fecundity and Life Table of the Fennel Aphid Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae). PLoS One 2015; 10:e0122490. [PMID: 25927991 PMCID: PMC4415802 DOI: 10.1371/journal.pone.0122490] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/22/2015] [Indexed: 11/18/2022] Open
Abstract
Hyadaphis foeniculi (Passerini) (Hemiptera: Aphididae) is a cosmopolitan species and the main pest of fennel in northeastern Brazil. Understanding the relationship between temperature variations and the population growth rates of H. foeniculi is essential to predict the population dynamics of this aphid in the fennel crop. The aim of this study was to measure the effect of constant temperature on the adult prereproductive period and the life table fertility parameters (infinitesimal increase ratio (rm), gross reproduction rate (GRR), net reproduction rate (R0), finite increase ratio (λ), generation time (GT), the time required for the population to double in the number of individuals (DT), and the reproduction value (RVx)) of the fennel pest H. foeniculi. The values of lx (survival of nymphs at age x) increased as the temperature rose from 15 to 28°C and fell at 30°C, whereas mx (number of nymphs produced by each nymph of age x) increased from 15 to 25°C and fell at 28 and 30°C. The net reproduction rates (R0) of populations of H. foeniculi increased with temperature and ranged from 1.9 at 15°C to 12.23 at 28°C for each generation. The highest population increase occurred with the apterous aphids at 28°C. The rate of population increase per unit time (rm) (day) ranged from 0.0033 (15°C) to 0.1995 (28°C). The highest values of rm were recorded at temperatures of 28°C and 30°C. The rm values were a good fit to the models tested, with R2 > 0.91 and R2adj > 0.88. The models tested (Davidson, Sharpe and DeMichele modified by Schoolfield et al., Logan et al., Lamb, and Briere et al.) were very good fits for the rm values observed, with R2 > 0.91 and R2adj > 0.88. The only exception was the Davidson model. Of the parameters studied, the reproductive capacity was higher in the apterous aphids, with the unique exception of daily fecundity at 28°C, which was higher in the alate aphids of H. foeniculi. Parameters relating to the age-specific fertility table for H. foeniculi were heavily influenced by temperature, with the highest biotic potential and population growth capacity found at 34°C. Therefore, the results obtained in this study could be of practical significance for predicting outbreaks of fennel aphids and improving the management of this aphid in fennel crops.
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Affiliation(s)
- Francisco S Ramalho
- Unidade de Controle Biológico, Embrapa Algodão, Campina Grande-Paraíba, Brazil
| | - José B Malaquias
- Unidade de Controle Biológico, Embrapa Algodão, Campina Grande-Paraíba, Brazil
| | - Aline C S Lira
- Unidade de Controle Biológico, Embrapa Algodão, Campina Grande-Paraíba, Brazil
| | | | - José C Zanuncio
- Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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