Determination of the Susceptibility to Methomyl and Buprofezin in Three Populations of Trialeurodes Vaporariorum Westwood (Hemiptera: Aleyrodidae)

The susceptibility level of Trialeurodes vaporariorum to methomyl was determined for three field populations collected from Lycopersicum esculentum Mill. in Quillota, Chile. Mean Lethal time (LT50) was estimated by probit analysis, managing to detect minimum losses of susceptibility in field populat...

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Published inAgricultura técnica Vol. 60; no. 4
Main Authors Vargas, Robinson M, Alvear, Andrés de la F
Format Journal Article
Published Chile Instituto de Investigaciones Agropecuarias, INIA 13.01.2003
Subjects
greenhouse white fly
insecticidas
insecticides
monitoreo de resistencia
mosquita blanca de los invernaderos
resistance monitoring
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Summary:The susceptibility level of Trialeurodes vaporariorum to methomyl was determined for three field populations collected from Lycopersicum esculentum Mill. in Quillota, Chile. Mean Lethal time (LT50) was estimated by probit analysis, managing to detect minimum losses of susceptibility in field populations of 1.1, 1.2 and 1.6 times more than the susceptible population. Additionally, analysis of variance (ANOVA) permitted the rapid differentiation between a susceptible population and population with less susceptibility. Field experiments confirmed the loss of susceptibility to methomyl and in addition the efficacy of buprofezin control. The control failures may be caused by both loss of susceptibility to methomyl and inefficient spraying techniques. A strategy of resistance management is discussed, that includes the use of insecticides with different modes of action, cultural practices, and utilization of biological control via Encarsia formosa and Eretmocerus corni.
ISSN:0365-2807