Abstract
The insecticide susceptibility of the stone leek leafminer, Liriomyza chinensis Kato, on Welsh onion was evaluated at 25°C under a 15L-9D photoperiod. Among 21 insecticides tested on second instar larvae using the leaf dipping method, CVP (mortality: 98.0%), thiocyclam (98.0%), cyromazine (80.9%) and nitenpyram (81.8%) produced high mortality. Adults of L. chinensis were highly susceptible to CVP (mortality: 85.4%), ethofenprox (100.0%), and spinosad (85.7%). Cartap, thiocyclam, ethofenprox, cypermethrin and emamectin benzoate reduced the number of feeding and oviposition punctures made by adult L. chinensis females.
