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目前,我省大部分棉区棉铃虫均已产生严重的抗药性,为延缓棉铃虫的抗药性,应注意以下几点。 1.掌握准确的用药时间,减少用药次数和用药量。农作物均存在着一定的耐害性和补修能力,在允许范围内,不会引起严重损失和品质下降。因此植保部门应及时作好虫情测报,并制定防治指标。在最佳防治时期,尽量减少用药量和用药次数,将棉铃虫控制在三龄以前,降低棉铃虫对药剂的选择,提高防治效果。
At present, cotton bollworm in most cotton areas of our province has produced serious drug resistance. In order to delay the resistance of cotton bollworm, we should pay attention to the following points. 1. Master the accurate medication time, reduce the number of medication and dosage. Crops have a certain degree of resistance and repair capacity, within the allowable range, will not cause serious losses and quality degradation. Therefore, plant protection departments should promptly make a good diagnosis of insects, and develop prevention and control targets. In the best stage of prevention and treatment, try to reduce the dosage and the number of drugs, the control of cotton bollworm before the third instars, reduce the bollworm selection of drugs to improve the control effect.