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Provedor de dados:  Scientia Agricola
País:  Brazil
Título:  Economic survey to support control decision for old world bollworm on processing tomatoes
Autores:  Sousa,Nayara Cristina Magalhães
Moita,Antônio Williams
Silva,Karla Fernanda Ayres de Souza
Silva,Paloma Alves
Torres,Jorge Braz
Data:  2021-01-01
Ano:  2021
Palavras-chave:  Heliothinae
Sex pheromone
Tomato pests
Resumo:  ABSTRACT: Helicoverpa armigera (Hübner) regularly requires quick deployment of control practices due to its potential of causing yield loss of processing tomatoes. The monitoring of H. armigera adults using stick traps lured with sex pheromone was correlated to egg densities, larvae, and percentage of damaged fruits, aiming to subsidize control decisions only using the number of males caught in the traps since surveying pest stages or damaged fruits is laborious and costly. Surveys were carried out on 11 tomato fields (ca. 80 to 120 hectares each) for processing during the 2015 and 2016 crop seasons. The survey was initiated at the flowering stage with traps set up along the field borders 100 m distant each. Evaluations of adult male capture in the traps were conducted twice a week for 14 and 10 weeks during the 2015 and 2016 seasons, respectively. Simultaneously, 70 tomato plants were fully inspected for eggs, larvae, and damaged fruits per area using a rate of 10 plants per point of trap setting in each area. Overall capture of male moths correlated to subsequent eggs, larvae, and damaged fruits. Based on the outcome of the regression analysis between male moths captured and percentage of damaged fruits, the control decision is suggested when three to six male moths are captured per trap during one week. The monitoring of adults using pheromone traps help deploy chemical or biological control methods to restrain H. armigera population reaching economic threshold levels.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação:  10.1590/1678-992x-2019-0280
Formato:  text/html
Fonte:  Scientia Agricola v.78 n.5 2021
Direitos:  info:eu-repo/semantics/openAccess

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