Maize smut, a systemic disease of seedling infestation, is mainly based on soil-borne diseases. It can be infected by pathogens from the germination of seeds to the five-leaf stage, and it is easy to occur in spring drought. In recent years, the disease has developed and spread. It is currently one of the most serious diseases that damage corn. Comprehensive prevention and control method of corn smut (1) Selection of disease-resistant cultivars: General M017 series hybrids and their extended cultivars have strong disease resistance. (2) Selection of coated seeds: The transmission route of corn head smut is seed, soil and fertilizer. Before the 5th leaf stage, the pathogens in the soil may be invaded by young shoots and young roots. Therefore, the coated seed must be used when planting, and the seed coating agent must be a drug with strong systemic absorption and long residual effect. Currently used in the production of the promotion of the following: 1 with the active ingredient of 0.07% of the amount of seeds of Triadimem seed dressing; 20% rust Ling 1kg, add 5kg of water, mixed with corn seed 75kg better. Diluted 250% botanic solution to 200 times soaking for 12 hours, or add carbendazim and thiophanate-methyl seed dressing. 350% of carbendazim wettable powder is seeded at 0.3%-0.7% of the seed amount, or 50% thiophanate-methyl wettable powder is applied at 0.5%-0.7% of the seed amount. (3) Removal of diseased plants: The symptoms of smut caused by corn heading usually begin at the 3-4 leaf stage of the seedlings. As the age of the leaf increases, the symptoms become more and more obvious. There are six types of early symptoms: bamboo shoots, dwarf clumps, yellow stripes (yellow leaves), deformed stem twists, abnormal leaves (leaf hard, very thick, thick leaves, dark foliage, uneven foliage ), top leaf twist type. Therefore, we must promptly remove the diseased seedlings and suspicious seedlings during the period of seedlings, seedlings, and weeding. The diseased plant should be buried or burned, and should not be picked up in the field to avoid further transmission. (4) Comprehensive agricultural prevention: Actively adopt agricultural measures to enhance the disease resistance of corn. If appropriate increase in density, improve the quality of sowing, early removal of diseased seedlings, no disease-fed cattle, to prevent manure bacteria, after harvest, concentrated treatment of field stubs and other leaves. At the same time, the land will be deep-turned in autumn and winter water will be poured in winter to reduce the source of pathogens. Accelerate the replacement of new disease-resistant varieties and implement a large-scale rotation system. Veterinary Drugs: refers to substances (including medicated feed additives) used to prevent, treat, diagnose animal diseases or purposefully regulate animal physiological functions.
Veterinary drugs mainly include: serum products, microecological products, Chinese herbal medicines, proprietary Chinese medicines, chemicals, antibiotics, and topical pesticides, disinfectants, etc.
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