Selectivity of insecticides to three vespidae predators of Dione juno juno(Lepidoptera : Heliconidae)

Among insects that attack passion fruit, Dione juno juno (Lepidoptera: Heli conidae) is considered the most dangerous plague. The selectivity of the in secticides fenthion, cartap, malathion and deltamethrin to the predatory wa sps Polybia fastidiosuscula, Polybia scutellaris and Protonectarina sylveir ae (Hymenoptera: Vespidae) was studied based on these insecticide toxicitie s to their prey Dione juno juno. Concentration-mortality regression lines w ere obtained and the estimated lethal concentration of insecticide to 90% ( LC90) of the individuals were used for the calculation of the differential selectivity index and tolerance index. Deltamethrin was selective in favor of P. scutellaris and P. fastidiosuscula and showed intermediate selectivit y to P. sylveirae, while cartap showed intermediate selectivity to all thre e species of predatory wasps. Malathion was selectivite to P. sylveirae and showed intermediate selectivity to P. fastidiosuscula. The predatory wasps P. sylveirae and P. fastidiosuscula were more tolerant to cartap than P. s cutellaris and P. sylveirae was more tolerant to malathion than P. fastidio suscula and P. scutellaris.