Control cotton verticillium

In recent years, the occurrence of cotton verticillium has been increasing year by year. The disease usually occurs after the cotton buds, and the flowering and ringing period reaches the peak of the disease from July to August. The edge of the diseased leaf curled upwards, and irregular yellowish patches appeared between the veins, and gradually deepened to a deep yellow or brown color, and the entire blade was palm-shaped withered. When the disease is serious, the whole leaf is crushed and broken into light stalks. The diseased plants are generally not dwarfed, and they can also have a small amount of cotton bolls, but the plants with early onset are relatively short. Longitudinal section of the stem, the vascular bundle is light brown discolored stripes.

How to prevent verticillium wilt, choose Komian 4 and other resistant varieties; rotate for rotation, and rice, corn, wheat, soybean, etc. for more than 3 years of rotation; seed disinfection, with 0.3% carbendazim suspension Cold soaked cottonseed for 14 hours; select the plot which is not cotton before the seedling bed, and use the endogenous biocontrol bacteria 73a to pour the solution before transplanting; health care cultivation, reduce the organic phosphorus such as phoxim, methamidophos and monocrotophos The frequency and concentration of pesticides are used to prevent cotton plants from being harmed by phytotoxicity and reduce disease resistance; nitrogen fertilizer, NPK, and potassium fertilizer are added to improve disease resistance and reduce disease. In the early stage of the disease, the roots of the endophytic bacteria 73a can be irrigated in time, or sprayed with the crown bacterium and master copper, and then controlled once every 7 days.

Source: Farmers Daily Author: Lin Ling

Lifting Shower Hinges

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