Rice false smut, also known as green smut, pink rice, usually occurs in late rice, but in recent years, the incidence of indica and hybrid japonica rice was significantly higher than other varieties, and the area has increased. According to my observations in the field for many years, many rice plants were susceptible to heading and flowering stages, and diseased infested panicles caused diseased grains, which reduced the grain-filling rate and the 1000-grain weight of rice. In the late stage of rice growth, partial application of nitrogen fertilizers led to the growth of green and luxuriant flowers. The flowering period also encountered high temperatures. Rainy weather, especially when it rains continuously, can lead to a reduction in yield. This pathogen contains toxic pigments. For example, if you use a diseased valley with more than 5% of the diseased animals as livestock feed, it can cause chronic poisoning, visceral lesions, and very harmful to human health. First, the characteristics of the disease. Rice smut is a fungal disease. The bacteria first formed yellowish-green micro-organisms at the juncture of the glume, gradually expanded, and finally wrapped the whole glume to form a “green millet†that was several times larger than the rice grain, which was nearly spherical. Cracking, scattered dark green powder (Bacterial chlamydospore). Second, the incidence of the law: bacteria with sclerotia and chlamydospores attached to the seed winter, sclerotia in the second year 7-8 months of development and produce a large number of ascospores, become the initial infestation source, chlamydospore germination spore. Ascospores and conidia are transmitted by airflow, infecting flower organs and young shoots when rice blossoms. Third, prevention and control measures: selection of high disease-resistant species. Avoid planting in the sick field and burn the diseased cereals early to avoid transmission of germs. Seed treatment can use copper sulfate, carbendazim, strong chlorine and other chemicals soaked. Strengthen fertilizer and water management. Careful application of nitrogen fertilizer, phosphorus, potassium fertilizer, reasonable irrigation, to reduce the incidence. Control with triadimefon or triadimefon 1 time 5-7 days before heading.
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