Temperature and Photoperiodic Regulation of Summer Diapause and Reproduction in Pyrrhalta humeralis (Coleoptera: Chrysomelidae)
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概要
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Feeding and reproductive activities of the leaf beetle, Pyrrhalta humeralis are suppressed during summer. The activation from this condition occurred just before October in the field. Active feeding and reproduction were induced by short day and low temperatures in the laboratory. Reproduction started at 20℃ under day lengths shorter than 13.5 h, whereas 25 and 30℃ inhibited reproduction even under LD 13 : 11. Reproduction was initiated at 15℃, even under LD 16 : 8, although 20 and 25℃ inhibited reproduction. While 25℃ failed to activate diapause females, photoperiods of 25℃ and higher affected mortality. Mortality was higher under LD 13 : 11 than under LD 16 : 8. Average egg-laying was approximately 210 eggs per female at 20℃, LD 13 : 11. Photoperiodic sensitivity remained unchanged at least until mid-August and the activation can be reversed at least until mid-September.
- 日本応用動物昆虫学会の論文
- 1995-05-25
著者
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Takeda Makio
Laboratory Of Insect Science Faculty Of Agriculture Kobe University:hyogo Technical High School
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Takeda Makio
Laboratory Of Entomology Faculty Of Agrieulture Kobe University
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NAKAI Tetsuro
Laboratory of Insect Science, Faculty of Agriculture, Kobe University
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Nakai T
Laboratory Of Insect Science Faculty Of Agriculture Kobe University
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