Rice smut disease prevention and control method

First, the symptoms of rice smut disease not only affect the yield, but also toxic to humans and livestock. Rice smut can occur from flowering to milk ripening and only harms the grain. The bacteria grows in the glume. In the early stage of the disease, the damaged grain husks open slightly, exposing small yellow-green lumps, then gradually expanding, wrapping the whole ridge, gradually changing to green, cracking, and emitting black-green powder, which can flow through the airstream. Spread, impregnating floral and juveniles when rice blooms. The disease caused a decline in grain-filling rate, 1000-grain weight, and increase in cereals, broken rice, rice yield and quality. The booting stage is characterized by low temperature, rain, and less sunshine. After the emergence of the ear, the temperature is high, the humidity is high, and the disease is easy to occur.
Second, control methods Rice smut prevention and treatment of appropriate period in the late booting rice, rice before the break about 5 days. If it is necessary to control for the second time, it will be applied during the rice break period (about 50% of rice breaks). The heading stage has a poor control effect. 25% Jinggangmycin powder 37.5g, or 20% triadimefon (also known as triadimefonone) 75ml, 60g sulfate can be sprayed on water per acre. Pay attention to the application at the end of the booting season. It is forbidden to apply after the first ear. Do not increase the application concentration arbitrarily to avoid phytotoxicity. (Researcher of Institute of Grain Crops, Provincial Academy of Agricultural Sciences)

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