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种植抗虫棉能有效控制棉铃虫的为害,但是长期大量、单一种植抗虫棉,对棉铃虫抗毒性及其他害虫种群动态也会产生较大影响。据田间调查表明,甜菜夜蛾对转基因棉的抗毒性较强,棉蚜(苗蚜、伏蚜)、棉叶螨、棉盲椿等种群数量较常规棉呈上升趋势,而棉叶蝉和白粉虱等种群数量有所下降。因此,应根据抗虫棉主要害虫发生特点,采取相应配套防治措施。 1.前期主要害虫为棉苗蚜和棉红蜘蛛,应以生物控制为主,化学防治为辅。选用吡虫啉
Planting cotton can effectively control cotton bollworm damage, but a large number of long-term, single planting cotton, bollworm toxicity and other pest population dynamics will have a greater impact. According to the field investigation, the beet armyworm had stronger anti-toxicity to transgenic cotton, and the populations of cotton aphid (Aphis gossypii, Aphis gossypii), cotton spider mite, cotton bollworm and so on were higher than those of conventional cotton, while cotton leafhopper and white powder Louse populations declined. Therefore, should be based on the characteristics of the main insect pest occurrence and take appropriate control measures. 1. Pre-main pests for the cotton seedling aphids and cotton spider, should be based on biological control, supplemented by chemical control. Use imidacloprid