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Pay attention to early control of wheat sheath blight
Wheat sheath blight is a newly developed disease in recent years. There are two peaks: one is the autumn seedling stage and the other is the jointing stage. It has been observed that the incidence of rice sheath blight is heavy in early-seeding wheat, high density, use of many nitrogen fertilizers, and more weeds; high temperature in winter, easy infestation of pathogens, and high temperature and humidity in spring will cause wheat sheath blight. Due to the causes of stems, the end of this year's autumn harvest is relatively advanced compared to previous years, and autumn species are also advanced. According to meteorological department forecasts, temperatures in this region will be high this winter, which are the conditions for the induction of wheat sheath blight. The occurrence of the following symptoms of wheat sheath blight occurs: after germination of wheat germinating blackened; after the three-leaf stem oval sheath brown lesions; leaves withered to death, severe disease seedlings do not smoke new leaves and die. The prevention and treatment of sheath blight now can start from two aspects: First, strengthen management. Increase the application of phosphorus and potassium fertilizer, reduce the amount of nitrogen fertilizer. The second is spray control. 25 grams of special tyrophane, 50 grams of green fenwei 1 50 kg against the spray, the main base of the stem, the ear can be controlled again depending on the severity of the epidemic.