June and July are the fastest growing months for cotton, but they are also the most serious months for pests and diseases. Therefore, the prevention and control of mid-term cotton pests and diseases is the basis for ensuring high yields and yields.
1. Disease prevention and control. The medium-term diseases of cotton mainly include the stem blight of cotton leaves and the wilt of cotton.
Control methods: Stem blight of cotton leaves is a physiological disease caused by extensive field management or potassium deficiency. Control measures: timely cultivating and weeding, increasing plant resistance, and spraying sulfur and potassium at the early stage of the disease for prevention and treatment. Cotton Verticillium wilt belongs to soil or seed colonization. In the early stage of disease, 15% neem poisoning agent 15 g plus 2 million units 72% of agricultural streptomycin and 5 kilograms of water are evenly sprayed.
2. Major cotton insect pests in the middle period: aphids, thrips, red spiders, cotton bollworms, etc.
Control methods: Aphid and thrips were sprayed with 30% chlorpyrifos suspension agent 80-100 g watered 40 kg per acre. At the time of occurrence of cotton bollworm, 40% chlorpyrifos suspension agent 100-150 g watered with 40 kg per mu was sprayed. When spider mites occurred, they were sprayed with 40 ml of dicofol 20% EC.
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