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2012 Vol.49 No.5
The effect of low temperatures on the over-wintering pupae of Hyphantria cunea
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Key Words： low temperature，Hyphantria cunea，survive
Abstract：
- The survival rate of Hyphantria cunea Drury pupae was found to reduce with increased time at lowtemperatures． Most pupae did not survive 30 hours at－10℃，3 hours at－15℃ or 25 minutes at－20℃． The survival rate of over-wintering pupae increased with prolonged exposure to 0℃ up to a maximum time of 150 minutes，after whichthere was no further significant increase