Affected by ecological conditions, meteorological factors, etc., cotton seedlings have many types of diseases and insect pests at the seedling stage, which are characterized by rapid development and heavy damage. This often results in the lack of seedlings and ridges in cotton fields and severe deaths in severe cases. The main diseases are black root disease, red rot, blight, anthrax, cotton aphid, and ground tigers. In the prevention and control, scientific drugs should be used for comprehensive prevention and treatment in due course.
1. Agricultural measures: Cotton should be planted with high-quality, high-yield, and disease-tolerant varieties for appropriate sowing; Secondly, strengthen management, increase basic fertilizer, early seedlings, timely seedlings, strengthen irrigation in dry season, deep cultivator after rain, increase ground temperature, and reduce soil Humidity enhances soil ventilation; thirdly, weeds must be removed from cotton fields and cotton fields to reduce the number of pests and diseases.
2. Early prevention of disease: In the initial stage of disease, cotton seedlings can be treated with 600 times 50% carbendazim WP or 70% ketamine WP 800 times; 40% carbendazim can be used for heavy tracts. Suspension gel or 65% mancozeb WP can be sprayed once a week and sprayed twice.
3. Scientific treatment of fleas: After the summer harvest, a large number of natural enemies moved from the wheat fields to the cotton fields. At this time, the use of chemical pesticides can be reduced and the control effect of natural enemies on locusts can be fully utilized. When the locust occurrence is severe, 10% imidacloprid wettable powder 1500 times liquid or 50% anti-incoin wettable powder 1000 times liquid spray can be used for prevention, and alternate medications should be taken to reduce the production of resistance.
4. Prevention of ground tigers: When tigers in the cotton fields are harmed, 50% phoxim 50 grams can be sprayed and mixed with 5 kilograms of sauteed wheat bran or crushed cotton seed cakes to make baits. Application, trapping larvae; or with 20% speed killing D 1500 times or 50% phoxim 1500 times or 800 times Kung Fu plus 800 times enemy killing spray control.
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