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棉蚜在淮北棉区为害1～3叶期棉苗卷叶5～12天,除株高、真叶数、叶面积指数、根系长度等都受抑制外,现蕾期推迟12天,蕾数减少59.8～77.3％,9月17日有效铃减少4.04～8.33,与不受害对照比较差异不显著。3～6叶期棉苗受蚜虫为害卷叶5～12天,对株高、叶面积有明显影响,蕾数减少10.9～17.1％,9月17日有效铃数与不受害的对照比较差异不显著。棉苗受蚜虫为害后本身有一定的调节和补偿能力,经一定的恢复时间能补偿损失赶上正常棉苗甚至不受损失。棉苗苗龄大容载蚜量大,恢复力强补偿作用明显。以棉蚜危害指数作防治指标准确简便,苗龄在1～3叶期指数为250;3～6叶期指数为350～400时进行防治,可以将棉蚜为害控制在蕾害损失5～10％以内,有效铃不受损失,按这个指标在淮北棉区防治棉蚜次数比常规方法减少50％左右。
Cotton aphid in Huaibei cotton area damaged 1 to 3 leaf stage cotton seedling leaf volume 5 to 12 days, except for plant height, true leaf number, leaf area index, root length and so are inhibited, the budding period delayed 12 days, buds Decreased by 59.8% -77.3%, effective bell decreased by 4.04-8.33 on September 17, and no significant difference compared with non-victimized control. 3 to 6 leaf stage cotton seedlings affected by aphids damage curly leaf 5 to 12 days, the plant height, leaf area had a significant effect, the number of buds decreased 10.9 ~ 17.1%, effective bell number on September 17 and non-affected control difference is not Significant. Cotton seedlings by aphid damage itself after a certain degree of regulation and compensation capacity, after a certain recovery time to compensate for the loss of catch up with normal cotton seedlings even without damage. Seedling age cotton seedling aphid large capacity, strong recovery of the obvious role of compensation. Aphid damage index as a control index is accurate and convenient, seedling age in the 1 ~ 3 leaf stage index of 250; 3 ~ 6 leaf stage index of 350 ~ 400 when the prevention and control of cotton aphids can be controlled in the lace damage loss of 5 to 10 %, Effective bell without loss, according to this indicator in the cotton apiary control in Huaibei cotton than the conventional method to reduce the number of 50%.