Anais da Sociedade Entomológica do Brasil (1999) 28, 301-306
Alfredo H.R. Gonring, Marcelo Picanço, Marcelo F. De Moura, Leandro Bacci and Cláudio H. Bruckner (1999)
Seletividade de Inseticidas, Utilizados no Controle de Grapholita molesta (Busch) (Lepidoptera: Olethreutidae) em Pêssego, a Vespidae Predadores
[Seletivity of insecticides used for the control of Grapholita molesta (Busch) (Lepidoptera: Olethreutidae) in peach, to predatory Vespidae]
Anais da Sociedade Entomológica do Brasil 28 (2), 301-306
Abstract: The selectivity of the insecticides carbaryl, deltamethrin, fenitrothion, fenthion, malathion, naled, methyl parathion and trichlorfon to the predators Protonectarina sylveirae (Saussure), Polistes versicolor versicolor (Olivier) and Protopolybia exigua (Saussure) was studied in laboratory using 50 and 100% of the recommended dose for the control of Grapholita molesta (Busch) (Lepidoptera: Olethreutidae) in peach orchards. The insecticides fenitrothion, fenthion, methyl parathion, naled, and trichlorfon showed no selectivity in favour of the wasps at the full recommended dose, all of them causing 100% mortality among the predators except for trichlorfon which caused 96.9% mortality to P. sylveirae. Carbaryl and malathion were selective in favour of P. versicolor versicolor (18.6 and 6.7% mortality, respectively), and deltamethrin was selective in favour of P. versicolor versicolor (3.6% mortality) and P. exigua (11.8% mortality). P. sylveirae was more susceptible to deltamethrin than P. exigua and P. versicolor versicolor. P. versicolor versicolor was more tolerant to malathion and carbaryl than P. sylveirae and P. exigua. Deltamethrin, malathion and naled were less lethal to P. sylveirae when applied at the lower dose; while the same happened to carbaryl and malathion for P. exigua.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Leandro Bacci, Marcelo Coutinho Picanco
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides
