マツノマダラカミキリの休眠前長日条件下飼育による蛹化率の低下および短日による休眠消去の試み(保護)

概要

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The Japanese pine sawyer, Monochamus alternatus (Coleoptera: Cerambycidae), which emerges once a year and diapauses in its last instar in Japan, was reared under various thermal and photoperiodic conditions on an artificial diet. When reared under 25℃LD10:14 for five months before two months chilling under 10℃ and complete darkness, almost all the beetles (97.8%) pupated at 25℃LD16:8 after chilling. But when kept at 25℃LD16:8 for five or seven months before chilling, the propotions of pupation were 51.2% and 61.5% respectively. The low diapause termination was thought to be an adaption in order for beetles not to emerge within a year through the experience of unexpectedly low temperature in summer or early autumn. The propotion of pupation varied among the parents under these conditions. When reared under 25℃LD16:8 with LD10:14 intervening for two months at the fifth month after oviposition, no beetle emerged. Low temperature is therefore needed to terminate the diapause when reared under a long photoperiod.
応用森林学会の論文
1996-03-25