Susceptibility of the vegetable leafminer, Liriomyza sativae (Blanchard) (Diptera: Agromyzidae) to lamda-cyhalothrin, abamectin, cypermethrin and chrothianidin

The vegetable leaf miner, Liriomyza sativae (Blanchard) is a serious insect pest on vegetable and ornamental crops in the whole of Vietnam. It was controlled by a wide range of conventional insecticides. Since there is a limited recommendation on insecticide application, growers continue to use whatever is available. This study was carried out at Entomology Laboratory, Faculty of Agronomy, University of Agriculture and Forestry, Hue University, Vietnam during 2021-22 to determine the susceptibility of larval and adult stages of L. sativae to four insecticides (e.g., lambda-cyhalothrin, abamectin, cypermethrin and clothianidin) currently used for the management of the leaf miner. Among four tested insecticides, abamectin was highly effective on larvae and moderately effective on adults of L. satiave. Lambda-cyhalothrin and cypermethrin were moderately effective on either larvae and adults of the leaf miner. Clothianidin was least effective against the leaf miner. These results suggest that abamectin, lambda-cyhalothrin and cypermethrin can be rotationally used for the management of L. sativae.