Seasonal prevalence and species composition of Liriomyza sativae Blanchard, L. trifolii (Burgess), and L. bryoniae (Kaltenbach)(Diptera: Agromyzidae) in Kyoto prefecture [Japan]

To document the relative abundance of Liriomyza sativae, L. trifolii, and L. bryoniae, the seasonal prevalence of three Liriomyza species infesting commercially grown tomato and cucumber plants was surveyed in four greenhouses in Kyoto Prefecture from 2000 to 2002. In tomato greenhouses, only L. bryoniae was found from April to July 2000 and 2002, but from August to December 2000 and 2002, L. sativae was predominant. Throughout 2001, L. sativae was predominant with a few L. bryoniae. In cucumber greenhouses, only a few L. bryoniae were found from April to June 2002. From August to November 2002, only L. sativae was found, except for one L. trifolii. Additionally, the species composition of the three Liriomyza species infesting commercially grown vegetable plants was occasionally surveyed by collecting full-grown larvae and pupae of Liriomyza found on the foliage of these plants at various locations in Kyoto Prefecture from 1997 to 2002. In 1997 and 1998, only L. trifolii or L. bryoniae was found. In 1999, L. sativae was also collected, but L. trifolii or L. bryoniae was predominant; however, from 2000 to 2002, L. sativae was predominant, and L. trifolii and L. bryoniae populations decreased suddenly.