ResumoNas últimas safras a mosca-branca, Bemisia tabaci biótipo B (Hemiptera: Aleyrodidae) tornou-se praga de importância econômica para a cultura da soja devido à ocorrência de altas infestações e à dificuldade de controle desta praga. Sendo assim, é importante buscar alternativas de manejo com base em um programa de manejo integrado de pragas. Assim, avaliaram-se neste trabalho a eficiência de diferentes inseticidas no controle da mosca-branca em casa-de-vegetação e a seletividade destes aos parasitoides Encarsia formosa, Trichogramma pretiosum e Telenomus remus. Buprofezina 150 g i.a. ha -1 + óleo mineral 0,2% v/v e piriproxifem 100 g. i.a. ha -1 foram consideradas as melhores opções para uso no manejo da mosca-branca devido à boa eficiência de controle da praga associada com a maior seletividade aos parasitoides estudados à exceção de Encarsia formosa para o qual nenhum dos tratamentos avaliados foi classificado como seletivo. Beta-ciflutrina 9,375 +imidacloprido 75 g. i.a. ha -1 foi eficiente no controle de ninfas, mas não foi seletivo aos inimigos naturais avaliados. Em geral, os tratamentos contendo piretróides na sua composição (beta-ciflutrina 9,375 + imidacloprido 75 + espiromesifeno 60 g. i.a. ha -1 ; beta-ciflutrina 9,375 + imidacloprido 75 g. i.a. ha -1 e lambda-cialotrina 26,5 + tiametoxam 35,25 g i.a. ha -1 ) foram os mais nocivos aos parasitoides avaliados, portanto seu uso deve ser evitado sempre que possível. Palavras-chave: Inseticidas, parasitoides, mosca-branca, manejo integrado de pragas
AbstractIn recent crop seasons, the whitefly, Bemisia tabaci biotype B has become a serious pest in soybean crops due to high infestations and its control difficulties. Therefore, it is important to search control alternatives in the integrated pest management approach. Thus, it was evaluated in this study the efficacy of the whitefly control using different insecticides in greenhouse conditions and their selectivity to the parasitoids Encarsia formosa, Trichogramma pretiosum and Telenomus remus. Buprofezin 150 g. a.i.ha -1 + mineral oil 0.2% v/v and pyriproxyfen 100 g. a.i.ha -1 were considered the best options for the whitefly management due to combine good pest control efficacy with higher selectivity to the parasitoids except
First of all, I need to thank my advisor Fernando Castor for the continuous support during the entire master's degree program, specially during the time I moved away from Brazil. He motivated me to continue to work on our project and together I believe we achieved quite a lot. I would not have been able to finish this master's degree program if it wasn't for his hard work and dedication. It was indeed a good choice to have him as my advisor. I have to also thank my wife Carolina Linard for pushing me forward so many times and for being very comprehensive while I stayed many nights awake to keep up with my work's schedule and the master's degree program schedule at the same time. Also, my mother, and some close friends were counting on me to finish this master's degree, so I had to keep that in mind to motivate me further. Finally, I must thank CIn-UFPE for providing the most adequate infrastructure for our research; for hiring the best professors one could have access for; and for having an incredible staff that supported me through difficult and bureaucratic times.
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