Seedlings and seedlings are the basis for seizing the high yield of cotton. As long as the root cause of the disease at the seedling stage is correctly understood and the knowledge of prevention and treatment is fully grasped, the cotton seedlings will not be affected by the disease and thrive. The disease at the seedling stage of cotton is not complicated. From the perspective of plant pathology, it can be divided into infective diseases and physiological conditions. Infectious diseases are caused by pathogens that cause harm. Root rot belongs to soil-borne pathogens. The symptoms are rot and black roots, causing wilting and death of stems and leaves. Blight is a soil-borne pathogen hazard. The symptom is that the young stem becomes brown, sag, causing young shoots to become frozen and even collapsed. The cataplexy disease is a fungal disease. The symptom is that the young stem is burned by boiling water, and the disease is down. Anthracnose is a fungal disease. Cotyledons or true leaves have irregular round brown spots and dark spots that affect the normal development of cotton seedlings. The above diseases seriously threaten the normal growth of cotton seedlings. The key to prevention and control measures is to do a good job of seed bed disinfection. You can use "rice foot green" powder or "Korean dry phosphorus" emulsion to mix soil or irrigate. The drug standard is: "Rice feet green 30 grams per square meter; 10ml per square meter of methyl tocophorus. It is also possible to use 1 gram per square metre of “Shi Le Shi†or “Rui Miao Qing†to fill the pot; after Miao Qi’s time, it is possible to use 2,000 times that of “Shi Le Shi†and “Rui Miao Qing†and 1:1:150 ratio of Bordeaux. Liquid, "killable" 1000 times sprinkling cotton seedlings, can effectively control the above-mentioned several diseases. Physiological diseases, that is, non-invasive disease symptoms, mainly caused by fertilizer damage, drug damage, underground pests, temperature and humidity does not cause. It is characterized by abnormal development without roots or roots, sudden death, dark green leaves, difficult true leaves, and red stems. These kinds of physiological diseases can be treated except insects, and others are difficult to control. Trying to spray the cotton seedlings with Shengzhifeng may ease the illness. The key to preventing physiological disorders is to use pesticides and fertilizers scientifically and rationally. Do not use "Paclobutrazol," "Azamethodone," "Glyphosate," and excessive amounts of organophosphorus pesticides and fertilizers. We must listen to the technical guidance of agricultural technicians with an open mind, and do not urgently seek medical advice, correctly identify infective diseases and physiological diseases, and use the right medicine to target the disease. Only in this way can we ensure the normal growth of cotton seedlings and lay a solid foundation for high cotton yield.
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