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自抗虫棉品种在津南区大面积推广种植以来,由于棉田用药次数减少,从而导致棉蚜在棉田危害逐年加重,成为棉花生产中主要虫害之一。本试验通过6种杀虫剂防治田间棉蚜,进行药效分析,达到筛选最佳防治药剂的目的。试验结果表明,3%万克2500倍液和4%阿维啶虫脒2500倍液防效最好,14d的平均校正防效在97%以上,田间持效期在15d以上,10%吡虫啉(40g/667m2)+助剂(15g/667m2)、25%蚜剑1500倍液、5%刷蚜1500倍液14d的校正防效也在95%以上,上述药剂可以在防治中轮换使用。
Since the insect-resistant cotton varieties were widely planted and popularized in Jinnan District, the harm of cotton aphid in the cotton fields has been increasing year by year due to the decrease of the medication frequency in the cotton fields, becoming one of the major pests in cotton production. In this experiment, six kinds of insecticides were used to control the cotton aphid in the field, and the efficacy analysis was carried out to achieve the purpose of screening the best prevention and cure agent. The results showed that the best effect of 2500 times solution of 3% wk 2500 times and 4% alverine 2500 times was the best, the average correction effect was above 97% in 14 days, the persistence period in field was above 15 days, the imidacloprid 10% 40g / 667m2) + additives (15g / 667m2), 25% aphid sword 1500 times, 5% aphids 1500 times 14d correction control effect is above 95%, the above agents can be used in the prevention and control rotation.