Two-year Life Cycle of the Red-headed Spruce Web-spinning Sawfly, Cephalcia isshikii(Hymenoptera:Pamphiliidae)
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概要
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Prepupal development of the red-headed spruce web-spinning sawfly, Cephalcia isshikii, was studied in an outbreak population at Naganuma, central Hokkaido. A 2-year life cycle was predominant in the population. Prepupae spent the first winter as eonymphs in the soil. Most became pronymphs by the second winter and developed into pupae the next summer. However, a small proportion of prepupae entered prolonged diapause as eonymphs. The developmental rates of overwintered pronymphs and pupae were faster at higher temperatures. The Q_<10> values for the development of overwintered pronymphs were low (1.3-1.6), so no available developmental zero was indicated for the post-diapause development of pronymphs.
- 日本応用動物昆虫学会の論文
- 1993-11-25
著者
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Maeto Kaoru
Hokkaido Branch Forestry And Forest Products Research Institute
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Ozaki Kenichi
Hokkaido Research Center Forestry And Forest Product Research Institute
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