The prevention and control strategies for the cotton bollworm were: adopting comprehensive measures to suppress wormholes, scientifically using medicines to arrest fighter planes, dominating the 1st generation, controlling 23 generations of pressing bases, and controlling 3rd and 4th generations of Baole Bells, Qiaozhi 5th generation to grasp key points.
1. Agricultural control. Fall and winter plowing soil, cultivating loose soil in the flood season in all seasons; planting insect-resistant cotton in a scientific and rational way; strengthening field management, pruning and erasing buds in time, picking ineffective buds, timely topping and picking hearts, artificially capturing and spawning eggs, Elimination of some larvae and eggs; Rational fertilization, full control, increase chlorophyll content and gossypol content, make plants grow robustly, raise egg production capacity of Wangma Computer Software Center; interplant 2 to 3 rows of spring corn in cotton field, in 1 Adults were killed in the morning by artificial killing of the heart-leafed adults; the moths were harvested with 3 moths of moths or poplars with 20 contiguous moths to reduce the amount of moths and eggs.
2. Biological control. In the second generation, organic phosphorus was applied to stems or biological agents were applied to protect and control the hazards of cotton bollworms by using Tianzhi. At the same time, at the peak of the 2nd and 3rd generation of eggs, 400ml of Bt emulsion or 10billion units of polyhedrin virus (such as the hero and Tianli) were sprayed on the water evenly for 2~3 times, and the control effect was up to 80%. .
3. Chemical control. The adoption of unified defense is conducive to improving control efficiency, reducing labor costs, reducing the number of natural enemies being killed, and preventing the increase in the resistance of cotton bollworms and the occurrence of poisoning accidents. The prevention and treatment shall be carried out within 2 to 3 days from the spawning period to the height of the newly hatched larvae and the prevention and control indicators. Selecting pesticides should aim at economically and effectively controlling the damage of cotton bollworm, scientifically and rationally mixing and using different types of pesticides and usage, minimizing the use of pesticides containing pyrethroids, and delaying and preventing the resistance of Helicoverpa armigera. Produce, spray to achieve a uniform, thoughtful, sufficient water, improve control effectiveness. At the same time, we must pay attention to the prevention and control of cotton bollworms on crops such as corn, soybeans, peanuts and vegetables to reduce the source of insects.
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