Abstract
Field surveys of the exotic leafminers, Liriomyza sativae Blanchard and L. trifolii (Burgess), as well as their associated parasitoids, were undertaken in Hamamatsu, Shizuoka Prefecture, Japan in 2009. The surveys, conducted one and two decades after the initial invasions of these species in the prefecture, respectively, revealed that only L. trifolii emerged from all eight leaf samples, suggesting that L. trifolii populations revived after the marked declines that followed the outbreaks of this pest in the early 1990s. Of the 15 parasitoid species collected during the survey, five species, Dacnusa sasakawai Takada, Diglyphus isaea (Walker), Chrysocharis pentheus (Walker), Neochrysocharis formosa (Westwood) and Neochrysocharis sp., were relatively abundant, and four species were new parasitoid records for Liriomyza in the prefecture.
