Effects of Intercropping Beans and Onions on Populations of Liriomyza spp. and Associated Parasitic Hymenoptera

Abstract

Surveys of commerical plantings and experimental studies on onions were conducted in the Kula area of Maui to provide information on the Liriomyza species and their parasites inhabiting the crop. Liriomyza huidobrensis (Blanchard) (95.7%) and L. trifolii (Burgess) (4.2%) were the predominant species found infesting the onions in commercial plantings. L sativae Blanchard was occasionally recorded. The major parasite species reared from leafminers collected from onions were Halticoptera circulus (Walker) and Chrysocharis parksi Crawford. Attempts to augment parasilization of leafminers infesting onions by planting adjacent bean borders for production of leafminer parasites were unsuccessful due to several factors which are discussed.