Control of bacterial Corner spot in Cotton
First, agricultural measures. 1. Fine soil preparation, application of sufficient fertilizer, irrigation of soil moisture, and selection of disease-resistant varieties. 2. Reasonable crop rotation and deep winter irrigation to promote the decomposition of diseased and disabled bodies. 3. Strengthen mid-tillage at seedling stage, reduce soil moisture, apply less nitrogen fertilizer, increase phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen the management of cotton field, drain water in time after rain, remove the remains of diseased plants and take them out of the field and bury or burn them in time, so as to reduce the pathogens in the field. Second, chemical measures. The main results are as follows: 1. Before sowing, the cottonseed is de-tufted with sulfuric acid, which can effectively kill the corner spot pathogen carried on the cottonseed cashmere, as well as other germs transmitted by the seed. 2. After the disease of cotton, 72% agricultural streptomycin can be sprayed evenly with 10 grams of agricultural streptomycin and 30 kilograms of water per mu, or spray 1 Bordeaux liquid with 200 times Bordeaux liquid plus new high-fat membrane.
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High yield of cotton foliar fertilizer spraying
First, foliar spraying nitrogen to prevent premature senility. When the cotton was nitrogen deficient, the leaves were light yellow, the lower leaves were yellow and withered, the fruit branches were few, the flowers and bolls were sparse, and the cotton yield and quality were affected at the initial stage of boll opening. Fertilizer spraying method: prepare 1% urea solution, spray 100 kg per mu, spray once every 7 to 10 days, continuous spraying.
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Prevention and Control of bacterial Corner spot in Cotton
First, agricultural measures. 1. Fine soil preparation, application of sufficient fertilizer, irrigation of soil moisture, and selection of disease-resistant varieties. 2. Reasonable crop rotation and deep winter irrigation to promote the decomposition of diseased and disabled bodies. 3. Strengthen mid-tillage at seedling stage, reduce soil moisture, apply less nitrogen fertilizer, increase phosphorus and potassium fertilizer, and cultivate strong seedlings. 4. Strengthen the management of cotton fields and drain water in time after rain.
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