Cotton boll red rot of cotton
Symptoms Cotton bolls infected after the initial amorphous spots, wet weather or continuous rain when the disease spread rapidly, throughout the whole boll, some spread to the cotton fiber, resulting in uniform pink or light red mold layer, easy to adhere together after the rain, into pink blocks, resulting in disease bolls can not crack, cotton fiber rot into stiff petal-like, seed infected, germination rate decreased.
The pathogen is the same as cotton seedling red rot.
Pathway of transmission and condition of disease The fungus belongs to weak parasite, it can't infect cotton bolls directly, it mainly causes disease from wound invasion, the disease spots caused by cotton boll angle spot, boll blight, boll anthracnose, etc. can induce red rot, and a large number of conidia are produced on the diseased bolls, which are transmitted by wind and rain and reinfected many times.
Control methods refer to cotton seedling red rot.
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How to calculate the cost of cotton production?
Cotton production mainly pays seed, fertilizer, artificial. ** Cotton seeds are mainly based on wool seeds, and one mu of land needs 5 - 6 kg, and each kg is basically about 5 yuan, so the seed cost is about 30 yuan/mu. The Yangtze River Basin is dominated by hybrid species, and one mu of land needs 7 two seeds. The market price per catty is 50 - 60 yuan, and the cost is also 35 - 40 yuan. The Yellow River Basin is also basically around 40 yuan. Pesticides and fertilizers are basically around 50 - 60 yuan. The labor cost is basically 400 - 500 yuan/mu.
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How to control the red leaf disease of cotton?
Cotton red leaf disease is a physiological disease, which has a great influence on the yield and quality of cotton. The disease usually begins at the early flowering stage. If the disease is not prevented and treated in time, the area of the disease will expand from the full flowering stage to the bolling stage, and the disease will be aggravated. At the beginning of the disease, the leaves showed dark green, then gradually thickened and wrinkled, brittle, yellow spots appeared between the veins, and the veins were still green. with the aggravation of the disease, the edge of the leaf began to roll down, and withered and fell off from yellow to purplish red until the cotton plant was completed and withered. The main pathogen of Cotton Red Leaf Disease
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