The toxicity of sixteen commercial formulations of pesticides used in peach production was assessed in the laboratory (25±1oC temperature, 70±10% relative humidity and 14h photophase) on adults of egg parasitoids Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera: Trichogrammatidae) by exposing the adult parasitoids to fresh dry pesticide film applied on glass plates and further evaluation of the capacity of parasitism per adult female. The reduction in capacity of parasitism compared with the control (treated with water) was used to measure the effect of the chemical. Pesticides were then classified into four categories, according to the reduction in parasitization: 1, harmless (<30%); 2, slightly harmful (30-79%); 3, moderately harmful (80-99%); 4, harmful (>99%). The pesticides (% commercial formulation in spray water) Captan 500 PM (0.240), Cobre Sandoz BR (0.240), Delan (0.125), Dodex 450 SC (0.175), Rovral SC (0.150) and Intrepid 240 SC (0.060) were harmless; Manzate 800 (0.200) was slightly harmful; Assist (2.000), Finale (1.000) and Roundup (original) (3.000) were moderately harmful; Kumulus DF (0.600), Hokko Cihexatim 500 (0.050), Vertimec 18 CE (0.080), Imidan 500 WP (0.200), Tiomet 400 CE (0.120) and Trebon 100 SC (0.150) were harmful to T. atopovirilia.
Insecta; side-effects; natural enemy; pesticides; Prunus persica L
