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高温胁迫及其持续时间对棉蚜死亡和繁殖的影响/Effects of pattern and timing of high temperature exposure on the mortality and fecundity of Aphis gossypii Glover on cotton[J]
Authors
中国气象局乌鲁木齐沙漠气象研究所,乌鲁木齐830002
中国科学院干旱区生物地理与生物资源重点实验室,中国科学院新疆生态与地理研究所,乌鲁木齐830011
+5 more
中国科学院研究生院,北京100049
吕昭智
夏德萍
孙平
高桂珍
Publication date
1 January 2012
Publisher
Abstract
为探索高温胁迫对棉蚜的影响,室内采用叶子圆片培养基饲养棉蚜的方法,研究不同温度(32,34,36,38,40℃)、不同处理时间(1,2,4,6h)对棉蚜死亡和繁殖的影响.结果表明:棉蚜每日死亡率可用互补重对数模型较好地拟合.随着温度的升高和持续天数的延长,棉蚜累计死亡率呈上升趋势,38 ℃条件下其累计死亡率明显迅速上升.棉蚜半数致死温度随着每天高温处理时间的增加和高温持续天数的延长而降低,且第1-2天下降明显.棉蚜繁殖率随着温度的升高呈下降趋势,每天处理时间不同其繁殖率规律不同,但均是在38℃时下降最多.38℃可能是棉蚜耐高温能力的拐点.研究结果为提高棉蚜种群预测准确性、科学决策最佳化学防治时间提供依据
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Last time updated on 29/11/2016