Spraying nitrogenous urea has the effect of destroying the chitin of insects. When the cotton aphids (especially the Fuxi) occur, they are mixed with urea, detergent and water in a ratio of 4:1:400 to form a “washing urea mixture†spray. , has a clear killing effect.
Phosphate fertilizer spraying in the adult stage of cotton bollworm, with 1% to 2% of superphosphate soaked liquid foliar spray fertilizer, oxalic acid can be changed to calcium oxalate and lost the lure to the cotton bollworm. The duration of each spray of phosphorus is generally 2 to 3 days.
Spraying potassium fertilizer with 10 kg of plant ash, 50 kg of water, soaking for 24 hours, filtering, and taking the filtrate, can effectively kill the aphid on the cotton. In the middle and later stages of cotton growth, spraying 1% to 2% potassium chloride (or potassium sulfate, potassium nitrate) solution on the leaves can prevent or reduce the incidence of cotton stem blight.
The application of boron fertilizer boron fertilizer is one of the necessary nutrients for cotton growth and development. In bud stage, early flowering stage, flowering and boll stage, it is sprayed with 0.2% borax (or 0.1% boric acid) solution; spraying at the bud stage per acre. 15 to 20 kilograms, 35 to 40 kilograms at the beginning of flowering and 50 to 60 kilograms during the flowering period.
Spray copper fertilizer with 1 part of copper sulfate, 1 part of lime and 200 parts of water, and make it into Bordeaux mixture of the same amount. Spraying at the seedling stage of cotton can prevent diseases of cotton seedlings. Spraying at the flowering and bolling stage can prevent and cure boll disease and reduce it. Bad bell.
Spraying chlormequat in the cotton bud stage, for the cotton field suffering from verticillium wilt, 50-50 kg per kilogram of chlorocholine solution can reduce the disease. (Author: Yutang Wang)
Phosphate fertilizer spraying in the adult stage of cotton bollworm, with 1% to 2% of superphosphate soaked liquid foliar spray fertilizer, oxalic acid can be changed to calcium oxalate and lost the lure to the cotton bollworm. The duration of each spray of phosphorus is generally 2 to 3 days.
Spraying potassium fertilizer with 10 kg of plant ash, 50 kg of water, soaking for 24 hours, filtering, and taking the filtrate, can effectively kill the aphid on the cotton. In the middle and later stages of cotton growth, spraying 1% to 2% potassium chloride (or potassium sulfate, potassium nitrate) solution on the leaves can prevent or reduce the incidence of cotton stem blight.
The application of boron fertilizer boron fertilizer is one of the necessary nutrients for cotton growth and development. In bud stage, early flowering stage, flowering and boll stage, it is sprayed with 0.2% borax (or 0.1% boric acid) solution; spraying at the bud stage per acre. 15 to 20 kilograms, 35 to 40 kilograms at the beginning of flowering and 50 to 60 kilograms during the flowering period.
Spray copper fertilizer with 1 part of copper sulfate, 1 part of lime and 200 parts of water, and make it into Bordeaux mixture of the same amount. Spraying at the seedling stage of cotton can prevent diseases of cotton seedlings. Spraying at the flowering and bolling stage can prevent and cure boll disease and reduce it. Bad bell.
Spraying chlormequat in the cotton bud stage, for the cotton field suffering from verticillium wilt, 50-50 kg per kilogram of chlorocholine solution can reduce the disease. (Author: Yutang Wang)
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