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Susceptibility of immature stages of Homalodisca coagulata (Hemiptera: Cicadellidae) to selected insecticides

Prabhaker, Nilima ; Castle, S J ; Toscano, Nick C

Journal of economic entomology, October 2006, Vol.99(5), pp.1805-12 [Periódico revisado por pares]

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  • Título:
    Susceptibility of immature stages of Homalodisca coagulata (Hemiptera: Cicadellidae) to selected insecticides
  • Autor: Prabhaker, Nilima ; Castle, S J ; Toscano, Nick C
  • Assuntos: Hemiptera ; Insecticides ; Life Cycle Stages
  • É parte de: Journal of economic entomology, October 2006, Vol.99(5), pp.1805-12
  • Descrição: Susceptibility of immatures of the glassy-winged sharpshooter, Homalodisca coagulata (Say) (Hemiptera: Cicadellidae), to 10 insecticides that included chlorpyrifos, dimethoate, endosulfan, bifenthrin, cyfluthrin, esfenvalerate, fenpropathrin, acetamiprid, imidacloprid, and thiamethoxam was evaluated in the laboratory. All five instars were exposed to different doses of each foliar insecticide by the petri dish technique, whereas a systemic uptake method was used to assess the toxicity to imidacloprid and thiamethoxam. All test insecticides exhibited high toxicity to all immature stages of H. coagulata at concentrations below the field recommended rates of each insecticide. Although all five instars were susceptible to test insecticides, mortality was significantly higher in first instars than in the older immatures based on low LC50 values (ranging from 0.017 to 5.75 ng(AI)/ml) with susceptibility decreasing with each successive stage. Fifth instars were generally the least sensitive (LC50...
  • Idioma: Inglês

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