チュウゴクオナガコバチとクリマモリオナガコバチ成虫の生存期間と産卵数

概要

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The longevity and oviposition of an introduced parasitoid, Torymus sinensis KAMIJO (Ts), and two strains of the endemic parasitoid, T.beneficus YASUMATSU et KAMIJO, one of which is the early-season strain (TbE) and the other is the late-season strain (TbL), were examined under laboratory conditions. Adults survived for about 1 or 2 months on average under the same temperature as in the field. The longevity of TbE was longer than the longevity of Ts and TbL. Under constant temperatures of 10°, 15°, 20°, and 25℃, the survival period of adults was longer at lower temperatures except for TbL males whose longevity was shortest at l0℃, Under outdoor temperature conditions, the mean numbers of eggs laid per fema1e by Ts, TbE, and TbL were 71.0,25.6,and 18.8,respectively and the pre-oviposition periods were 4.8,12.5,and 5.5 days, respectively. Ts females oviposited about twice as many eggs as those of TbE irrespective of the temperature conditions. Egg laying activity by Ts females was observed to be highest around 20℃.
1992-05-25