Insecticide susceptibility of Spodoptera litura Fabricius in Gifu Prefecture, Japan

Abstract

The susceptibility of the common cutworm’s (Spodoptera litura Fabricius) third instar larvae to 10 insecticides was evaluated. The corrected mortality rates associated with chlorfenapyr, metaflumizone, cyantraniliprole, and fluxametamide were >90% in many tested populations. The LC₅₀ values of flubendiamide, chlorantraniliprole, and pyridalyl for all tested populations were higher than those for the susceptible population and those reported in previous studies. In conclusion, although several insecticides worked effectively against S. litura, the insect’s susceptibility to flubendiamide, chlorantraniliprole, and pyridalyl was less.