1棉蚜暴发的原因1.1气候因素棉蚜种群数量受棉蚜发生期间的天敌与气候的共同作用,棉蚜繁殖的适宜温度是23～27℃,适宜的温度是棉蚜种群数量剧增的主导因素。2004年5月中旬至6月上旬,卖盖提垦区平均气温在23.4℃,相对湿度49%,有利于棉蚜的发生。从系统调查看,棉蚜6月5日达到高峰 1 Aphis outbreak causes 1.1 Climatic factors Cotton aphid populations affected by the occurrence of cotton aphid natural enemies and climate, cotton aphid reproduction of the appropriate temperature is 23 ~ 27 ℃, the appropriate temperature is the dominant population of cotton aphid population surge factor. From mid-May to early June 2004, the average temperature in the land cover of GTI was 23.4 ℃ and the relative humidity was 49%, which was in favor of the occurrence of cotton aphid. From a systematic investigation, cotton aphids peaked on June 5