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Second-generation cotton bollworm control
At present, the second generation of cotton bollworm is in a period of endangerment, and many farmers want to understand its prevention and control methods. According to Wang Fengxing, director of the Agricultural Technology Promotion Center of Ninghe County, Tianjin, during the second generation of cotton bollworm, the majority of cotton farmers are seriously examining and controlling cotton bollworm, but they should also focus on cotton bollworms on crops such as vegetables, melons and soybeans. Check the work. For example, when 100 cotton larvae reach 20 or more, and 100 larvae of 1 to 2 instar larvae reach 5 indicators, measures should be taken immediately for prevention and control. The specific methods are as follows: First, use 25% strong thunder 1500 to 2000 times liquid for cotton field spray; Second, use 30% worms net 1500 to 2000 times liquid to spray; Third, you can also use 100 to 169 ml of 40.7 per mu of cotton fields % Lospens can be sprayed with water.