Toxicities of insecticides against two species of flower thrips collected from strawberry plants in Nara Prefecture

Abstract

Effects of six insecticides were investigated on two species of flower thrips, Frankliniella occidentalis (Pergande) and F. intonsa (Trybom), collected from strawberry greenhouses in Nara Prefecture. Spinosad was found to be the most effective insecticide against two species of flower thrips in terms of corrected mortality and leaf damage. Fluxametamide was found to be an effective insecticide. Cyantraniliprole showed low corrected mortality but low leaf damage. Flometoquin was found to be effective against F. occidentalis, but ineffective against F. intonsa. Acetamiprid results differed in terms of corrected mortality and leaf damage according to the population. These results suggest that spinosad and cyantraniliprole are effective insecticides against two species of flower thrips, F. occidentalis and F. intonsa, from strawberry plants in Nara Prefecture.