Cotton field old disease prevention "remedies"

Zhang Xingfa, a farmer who had planted many years of cotton in Kenli County, called him and said that the local area is an old cotton area where cotton is grown for many years. It is prone to cotton wilt disease and mixed wilt and yellow wilt. Last year because of the heavier incidence, a lot of production was reduced. He is worried that these old diseases will still occur this year and he will inquire whether there are effective solutions. The reporter consulted about cotton planting experts.

According to reports, withered cotton and yellow wilt are generally spread from the seeds, and in the conventional prevention and control measures, many are replaced with disease-resistant varieties and wheels. These two measures have a certain effect on wilt disease. However, some old cotton areas are difficult to achieve rotation. In some disease-resistant varieties, although the resistance to wilt disease is better, the high yield cannot be synchronized. Therefore, disease prevention must be set aside.

Experts said that the first scientific application of bio-organic compound fertilizer and potash fertilizer can prevent cotton with blight and blight, stem blight and red stem blight.

According to reports, bio-organic compound fertilizer can inhibit cotton wilt disease. "Because of the organic matter in bio-organic compound fertilizers and the various types of microbial manure that are applied, the secreted organic acids can improve the soil environment and can significantly inhibit the survival of Fusarium oxysporum. In the application of basal fertilizer or chase-herb fertilizer for cotton, per acre The application of 100-150 kg of bio-organic compound fertilizer can better prevent the occurrence of fusarium wilt, or greatly reduce the incidence, and quickly restore normal reproductive function."

“Potassium fertilizer can increase the defense ability of cotton against fusarium wilt.” According to reports, increasing potash fertilizer can coordinate the proportion of nitrogen, phosphorus, and potassium fertilizers in the soil and increase cotton's own activity. At the same time, potassium deficiency in cotton will reduce the supply of carbohydrates. Protein Synthesis will be hampered. Nowadays, the area of ​​transgenic insect-resistant cotton is large. Their absorption and conversion to potassium is slow, and the effect of not applying potassium fertilizer and a small amount of potassium is not good. The application of potash fertilizer increased the activity of cotton and enhanced the ability to prevent fusarium wilt and blight, stem blight, and stem blight of red leaves. Experts suggest: "Applying about 60 pounds of potassium sulfate or potassium chloride per acre will effectively increase the resistance to several of the above-mentioned diseases in cotton."

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