Toxicities of insecticides on onion thrips collected from Welsh onion fields in Nara prefecture

Abstract

Using onion thrips collected from Welsh onion fields in Nara prefecture, Japan, the toxicities of 11 insecticides were investigated. Treatment with imidacloprid, spinosad, abamectin, flometoquin, cyantraniliprole, and pyridalyl exhibited the greatest efficacy, with greater than 90% mortality and no leaf damage, followed by emamectin benzoate. Treatment with cypermethrin, dinotefuran, thiocyclam, and tolfenpyrad led to less than 60% mortality. Results suggested that spinosad, abamectin, flometoquin, and cyantraniliprole have utility for chemical control of onion thrips.