How to effectively prevent and control cotton bacterial angular leaf spot
I. Agricultural measures. 1. Prepare the soil carefully, apply sufficient basal fertilizer, ensure adequate pre-planting soil moisture, and select disease-resistant varieties. 2. Practice rational crop rotation, plow deeply and irrigate in winter to promote the decomposition of diseased plant residues. 3. During the seedling stage, strengthen intertillage, reduce soil moisture, apply less nitrogen fertilizer and 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 basal fertilizer, ensure adequate pre-planting soil moisture, and select disease-resistant varieties. 2. Practice rational crop rotation, plow deeply and irrigate in winter to promote the decomposition of diseased plant residues. 3. During the seedling stage, strengthen intertillage, reduce soil moisture, apply less nitrogen fertilizer and more phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen cotton field management, drain promptly after rain, promptly pull up diseased plants and residues and carry them out of the field to be deeply buried or burned, so as to reduce 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 pathogen carried on the short fuzz of cottonseed, and can also kill other pathogens spread by seed. 2. After cotton becomes diseased, use 10 g 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.