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The wild bruchid beetle, Bruchidius dorsalis Fahraeus (Coleoptera: Bruchidae), has a multivoltine life cycle and overwinters in several developmental stages in the middle part of Japan. We investigated the incidence of diapause under different conditions of photoperiod (from L8:D16 to L16:D8) and temperature (at 20 °C and 24 °C). Our experiments revealed the following results: (1) B. dorsalis entered...
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