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2010年47 No.4
Effect of high temperature on survival of the cotton aphid, Aphis gossypii
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Key Words： Aphis gossypii, high temperature, survival, LT50
Abstract： Detailed experiments were conducted to assess the effects of high temperatures (30, 34, 38, 42 and 46
℃) and the length of exposure to these (1, 2, 5 and 8 h) on the survival of Aphis gossypii Glover. The results show that survival decreased with increasing temperature and duration of exposure. The survival of A. gossypii decreased slowly between 30
℃ and 38
℃, but rapidly at 42
℃ and above. The LT
50 of aphids decreased with increasing exposure to high temperatures. Adult aphids had lower tolerance to high temperatures than nymphs.