The oriental fruit moth Grapholita molesta is one of the main pests of apple and peach trees. In this study, the mortality caused by insecticides when applied on different stages of development of G. molesta and about fruits and tops of apple and peach trees was evaluated. The insecticides acetamiprid (8g 100L -1), phosmet (100 g 100L -1), spinetoram (3.75 g 100L -1) and novalurom (4.0 g 100L -1) reduced hatching in levels above 80%, regardless of whether the application is performed before or after oviposition. The etofenprox (15 g 100L -1) was the most effective when applied after oviposition. In apple and peach tops, the insecticides acetamiprid, chlorantraniliprole (4.9 g 100 L-1), etofenproxi, phosmet, novaluron and spinetoram caused mortality of larvae over 90%. In apple fruits, the insecticides acetamiprid, chlorantraniliprole, etofenprox, phosmet, and spinetoram, caused 100, 79, 76, 97 and 100% mortality, respectively, whereas in peach fruits this control was over 85%. The insecticide novaluron caused lower mortality of larvaes when applied on fruits, compared to the application on tops. In adults, only the insecticides etofenprox and phosmet were toxic both to females (59% and 39%) and males (79% and 80%), while spinetoram was effective only in males (78%). It is concluded that insecticides etofenprox, phosmet and spinetoram were efficient in the control of G. molesta in all stages of development.
Oriental fruit moth; Acetamiprid; Chlorantraniliprole; Spinetoram; Etofenprox; Novaluron
