天敵昆虫アカメガシワクダアザミウマHaplothrips brevitubus (Karny) の捕食レパートリーおよび鹿児島大学農学部学内圃場における季節消長

概要

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The repertoire of potential prey for Haplothrips brevitubus (Karny) and its seasonal abundance in the light, open grassland around the paddy field at Kagoshima University were investigated. Eggs of Spodoptera litura, Lampides boeticus, Epilachna vigintioctopunctata, Lasioderma serricorne, Callosobruchus chinensis, Tetranychus urticae, larvae of E. vigintioctopunctata, Bemisia argentifolii, Frankliniella occidentalis, Thrips hawaiiensis, Liriomyza sativae, and adults of Myzus persicae, T. urticae, F. occidentalis, T. hawaiiensis were prey for the predator thrips H. brevitubus under laboratory condition. The predator thrips were collected by net-sweeping between Feburary and December, although their prey thrips population increased only in April, June and late September. The thrips were collected from 56 plant species by flower or foliage beating. During the overwintering period, it was found on inner-side of the leaf seath of some grasses and sedges. But the thrips did not appear to be dormant reproductively, because its larvae could be found on flowers ofPolygonum Chinese (L.) H. Gross in warm days in winter.
2008-03-14