マツヅアカシンムシとその天敵昆虫の個体群動態に関する研究

概要

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The investigation was done for 10 years from 1957 to 1967 at various plantations of young Pinus thunbergii PARL. in the Tokyo University Forest in Aichi Prefecture. Life histories of Evetria cristata and its natural enemies were mainly studied in the years up to 1961, and in and after 1962 the population changes of these insects were studied. E. cristata has two generations in one year in this region. The adult emerged in April and July. The insect overwintered at the pupal stage. The natural enemies of E. cristata were 16 species of 9 families of insects. One of them was an undetermined lepidopterous larva of the genus Eurhodope, Pyralidae, which was recorded as a predator on the larvae and pupae of E. cristata. However, the majority of natural enemies were hymenopterous parasites. Life cycles were made clear for six common species of parasites. Three species of hymenopterous parasites were found especially abundant in the study area. Lissonota evetriae (Ichneumonidae), a larval parasite of E. cristata, had only one generation per year, and the adult emerged in May. Itoplectis cristatae (Ichneumonidae) and Pediobius sp. (Eulophidae) were pupal parasites of E. cristata, and completed three or more generations in one year.
東京大学大学院農学生命科学研究科附属演習林の論文