Prevention and Control of bacterial Corner spot in Cotton

1. Agricultural measures. 1. Fine soil preparation, full application of base fertilizer, irrigation of soil moisture, selection of disease-resistant varieties. 2. Reasonable rotation, deep ploughing and winter irrigation to promote decomposition of sick and disabled bodies. 3. Strengthen intertillage in seedling stage, reduce soil moisture, apply less nitrogen fertilizer, increase phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen cotton field management, drain water in time after rain, pull out diseased plant residues in time and take them out of the field for deep burial or burning, so as to reduce field pathogens. II. Chemical measures. 1. Before sowing, cotton seeds should be delaminated and delaminated with sulfuric acid, which can effectively kill the angular spot bacteria carried on cotton seed short lint, and also kill other bacteria transmitted by seeds. 2. After cotton disease, 72% agricultural streptomycin 10g and water 30kg can be sprayed evenly according to 60kg per mu, or 1:1:200 times Bordeaux mixture plus new lipid membrane can be sprayed for control.