Hymenopterous parasitoid fauna of the leafminers on garden pea and broad bean fields in Ibusuki, Kagoshima.

Abstract

Species composition and its seasonal changes of parasitoids against leafminer flies, Chromatomyia horticola and Liriomyza trifolii, were surveyed in fields where snap pea, Pisum sativum, and broad bean, Vicia faba, were cultivated in Ibusuki City, Kagoshima Prefecture from October 2015 to March 2016. Noted parasitoids were seven species against C. horticola and six species against Liriomyza trifolii, respectively. The dominant species were Diglyphus isaea, Hemiptarsenus varicornis and Opius spp. against C. horticola. Furthermore, Neochrysocharis formosa was added to aforementioned three parasitoids against Liriomyza trifolii. Parasitoids’ species composition changed with season, ratio of Diglyphus isaea and Opius spp. increased in the cold season（ from December to February）, suggesting that thermal suitability of the parasitoids may affect its occurrence.