What are the control methods for cotton bacterial angular leaf spot?
I. Agricultural measures. 1. Prepare the soil carefully, apply sufficient base fertilizer, ensure adequate pre-planting soil moisture, and select disease-resistant varieties. 2. Practice rational crop rotation, deep plowing and winter irrigation to promote the decomposition of diseased plant residues. 3. During the seedling stage, strengthen intertillage, reduce soil moisture, apply less nitrogen fertilizer, apply more phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen cotton field management, drain promptly after rain...
I. Agricultural measures.
1. Prepare the soil carefully, apply sufficient base fertilizer, ensure adequate pre-planting soil moisture, and select disease-resistant varieties. 2. Practice rational crop rotation, deep plowing and winter irrigation to promote the decomposition of diseased plant residues. 3. During the seedling stage, strengthen intertillage, reduce soil moisture, apply less nitrogen fertilizer, apply more phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen cotton field management, drain promptly after rain, promptly pull out diseased plants and residues and carry them out of the field to be deeply buried or burned, reducing pathogens in the field.
II. Chemical measures.
1. Before sowing, first delint the cottonseed. Delinting with sulfuric acid can effectively kill the angular leaf spot bacteria carried on the short lint of cottonseed, and can also kill other pathogens spread by seeds. 2. After cotton develops the disease, use 10 grams of 72% agricultural streptomycin added to 30 kg of water and spray evenly at 60 kg of solution per mu, or spray 1:1:200 Bordeaux mixture plus New High-Fat Film for control.