Insecticide Susceptibility of Eumeta minuscula Butler and Mahasena aurea (Butler) (Lepidoptera: Psychidae)

Abstract

The insecticide susceptibility of bagworm moths, Eumeta minuscula Butler and Mahasena aurea (Butler) on tea leaves was evaluated at 25°C under a 15L9D photoperiod. Among the 18 insecticides tested on second or third-instar larvae using the leaf-dipping method, chlorantraniliprole and flubendiamide were more toxic to the E. minuscula. The damage degree of tea leaves by E. minuscula larvae showed 0 when applied with cartap and fenpropathrin. Among the 15 insecticides tested on second or third-instar larvae using the leaf-dipping method, flubendiamide, emamectin benzoate, spinetoram, chlorfenapyr, and fluxametamide caused high mortality in the M. aurea. The application of methomyl, spinosad, flubendiamide, and fluxametamide reduced the degree of damage to the tea leaves by M. aurea.