INIMIGOS NATURAIS E SUA RELAÇÃO COM O CONTROLE QUÍMICO EM Solanum tuberosum

Abstract

Conventional management is still widely used against leaf miner larvae in potato plants. However, studies that point to synthetic chemical insecticides with low toxicity to natural enemies, under field conditions, are still incipient. The objective of this study was to present the selectivity of insecticides to natural enemies associated with leaf miner larvae. The treatments were six synthetic insecticides: (T1) spinetoram, (T2) chlorfenapyr, (T3) thiamethoxam+, so named because it is a factory mixture involving thiamethoxam and abamectin, (T4) cyantraniliprole+, also containing abamectin in the formulation, (T5) cyantraniliprole , (T6) indoxacarb and, finally, an absolute control (T7) containing only water. Yellow sticky traps were used for sampling. The absolute number of parasitoids sampled was 2.21 times higher compared to the predator Chrysoperla externa. However, the amount of C. externa adults collected showed less oscillation, over time, under the effect of insecticides.