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棉蚜(Aphis gossypii Glover),是我省淮北棉区棉花苗期的主要害虫。棉苗出土后,有翅蚜即陆续迁入棉田,为害期延续一个月以上,以往对苗蚜的防治用药多至四、五次,但效果仍不理想,而且蚜虫对药剂的抗性、环境污染日趋严重,农业生产成本不断提高。为有效地开展防治,提高生态效益、经济效益和社会效益,必须摸清棉蚜的为害损失,探讨相应的经济防治指标。一、试验方法试验在蒙城县一熟棉田进行,共设五个处理,棉苗卷叶株率分别为0(对照)、10％、20％、30％、40％,随机排列,三次重复,小区面积0.05亩,试验地净面积
Cotton aphid (Aphis gossypii Glover), is the main pest of cotton seedling stage in Huaibei cotton area of our province. After the emergence of cotton seedling, the winged aphids gradually moved into the cotton field, the damage period continued for more than a month. In the past, the prevention and treatment of seedling aphids up to four or five times, but the effect is still not ideal, and the aphids on the drug resistance, environment Pollution is becoming more serious and the cost of agricultural production is constantly rising. In order to effectively carry out prevention and control and improve ecological, economic and social benefits, it is necessary to find out the loss of damage caused by cotton aphid and probe into the corresponding economic prevention and control targets. First, the test methods Test in Mengcheng County, a mature cotton fields, a total of five treatments, cotton seedling leaf rate was 0 (control), 10%, 20%, 30%, 40%, random arrangement, three repetitions , The plot area of 0.05 acres, the net area of the test