Because cotton sowing is too early, low temperature and rainy, poor farmland operations and other reasons, it will easily lead to serious seedling disease, resulting in lack of seedlings broken ridge, slow growth, delay the birth process, affecting production. The main diseases of cotton during seedling stage include blight, anthracnose, red rot, damping-off, black spot, stem blight, and early wilt. It is advisable to use comprehensive control measures to be effective. First, improve the soil fertility by increasing the farm fertilizer, vigorously promote the return of straw, intensive cultivation and other agricultural measures, fertility, soil improvement, increase soil permeability, can effectively control the occurrence of seedling disease. 2. Selection of disease-resistant varieties and selection of disease-resistant varieties by coating with good seed coating agents is a fundamental measure to prevent diseases. The selection of varieties should not only be based on publicity, but should be selected through practice-proof disease-resistant varieties. Many years of experiments have shown that the positive Syngenta seed coating agent of Syngenta has a reliable control effect on cotton seedling disease. Third, regular late broadcast This year's climate is abnormal, the temperature is low, the sowing period should be delayed 5 to 10 days than the year-round. Appropriate late sowing can not only prevent seedling diseases, but also prevent premature aging of cotton and rotten bells. Fourth, alternating medication strictly control the amount of herbicides. Continuous use of trifluralin in weeding cotton fields should be replaced with other herbicides to prevent phytotoxicity and aggravate the occurrence of disease. Herbicide herbicide effective amount should be controlled in: trifluralin per acre 60 ~ 72 ml, mulch cotton 50 ml per acre, before sowing and mixed with soil; acetochlor control in 45 ~ 55 ml per acre, seedlings after sowing Before use, mulch cotton is prone to phytotoxicity and is not recommended for use; Penicillin is 66 to 100 ml/mu, which is relatively safe for cotton seedlings. It is used before or after sowing because it has a greater lethal effect on dicotyledonous weeds. Poor, it should be mixed with other herbicides; Dole 72 ml per acre, before seeding after sowing, soil need to be light soil when it is dry. The amount of pesticide above the water should be controlled at about 50 kg per mu. Fifth, warming up and protecting the land The management of the field before and after the emergence of the cotton with emphasis on the cultivating loose soil will be strengthened. For example, after the rain, the mulching cotton will be put on the soil in a timely manner, and the loophole will be closed. Severely diseased plots were treated with early seedlings (one leaf and one heart) and late seedlings (after three leaves) to ensure that the seedlings were fully grown. Sixth, chemical control cotton seedling disease dead seedlings have two peak periods. First, about half a month after emergence, cotton seedlings grow a true leaf; Second, cotton seedlings three-leaf period, the main disease is early blight, usually occurs in the 25 to 30 days after emergence, our province in late May as serious Onset. Therefore, in order to strengthen field management, it should be approached before the onset of disease control. Its effective control agents are: 85% trichloroisocyanuric acid WP, ​​spraying water at the seedling stage, 35 grams per mu; gold Aplon, 1000 times liquid coating agent for Shile, early onset of spraying; carbendazim , Mancozeb, thiophanate-methyl, etc. 500 ~ 800 times the liquid, the initial incidence of spraying; Xinke Huang dry, fulvic acid, early in the early stages of wilt disease spraying. In addition, the use of Hebei Province Academy of Agricultural Sciences and plant protection by the mildew seed dressing and 500 times the root irrigation, the seedling disease has a good control effect. Coronavirus Mask,Coronavirus Face Mask,Kn95 Approved Mask,Kn95 Approved Face Mask Dongguan City Risen Medical Products Co., Ltd. , https://www.risenppe.com