Liriomyza species are the major pests of greenhouse and field crops. It was as minor pests in past, but the pest population increased rapidly such as L. trifolii, L. huidobresnsis and L. sativae during recent years is attributed to application of ineffective insecticides and developed insecticide resistance. This study was carried out to determine the efficacy of insecticides groups, Anthranilic diamide, Biopesticide, Carbamate, Neonicotinoid, Organophosphate, Pyrethroid and Oxadiazine, recommended for the control of leafminer species in Korea. Bioassay tests were done on first, third larval stages and adults under glasshouse and laboratory conditions respectively. The result showed significant differences in toxicity among the tested insecticides. The mortality of abamectin and lepimectin and spinosad were higher (>50%) in larvae stages. Etofenprox insecticide was not effective on larvae stage. The toxicity of Cartap hydrochlorid (Neonicotinoid) was higher (100%) in adult insects, followed by thiamethoxam, etofenprox and indoxacarb. Abamectin and lepimectin showed the decreasing toxicity level as insect stage developed. Abamectin showed least toxicity (26.67%) in adult stage. Spinetoram and emamectin benzoate showed higher toxicity (>50%) in all the insect stages tested. It could be suggested that abmectin and lepimectin have high efficiencies on control of larvae. However, spinosad and emamectin benzoate has higher potential on the control of both larvae and adult insects.

• Rameswor Maharjan(Department of Bioresources Science, Graduate School, Andong National University, 760-749, Korea)
• Chuleui Jung(Department of Bioresources Science, Graduate School, Andong National University, 760-749, Korea)