Eficiência e efeitos subletais de nim sobre Bonagota salubricola (Meyrick) (Lepidoptera: Tortricidae)

the objective of this study was to evaluate the efficiency of control and sublethal effects of neem insecticide (10 g.l-1 of azadirachtin a) to the leafroller bonagota salubricola at laboratory condition. in the bioassays, it was used an azadirachtin based product (neemazal-t/s？) at concentrations of 0.06%, 0.09%, 0.12%, 0.16%, 0.18% and 0.20% of the commercial product (c.p.) and a control (distilled water). the artificial diet was cut in cubes and immersed in the syrups of the respective product concentrations, soon afterwards recently-emerged caterpillars were transferred to glass tubes, containing the diet cubes treated. when the artificial diet was treated with a concentration of 0.20% of the commercial product, the mortality was 100% at the 6th day after inoculation. additionally, concentrations of 0.16% and 0.18% extended the larval stages, reduced pupae viability and negatively affected the fecundity of the insect.