Scattered wheat smut is commonly known as black sorghum, and the disease is a typical species-borne disease. Seed-bearing seeds are the only way to spread the disease. When the wheat sow germinates, the latent mycelium begins to sprout into the growing point, and then it develops upwards, destroys the flowering device when heading, and forms black powdery chlamydospore, which affects the healthy growth of the plant.
Prevention of wheat smut can take the following measures: 1 establish disease-free seed fields, sowing disease-free seeds or seeds that have been strictly disinfected, must be subject to strict quarantine at the time of introduction, and the seeds can not be sowed. 2 Implement 1-2 year rotation with non-host crops and increase organic fertilizers to promote the proliferation of soil bacteria. 3 To improve the quality of sowing, different regions should grasp the sowing date according to local conditions, apply sufficient basal fertilizer, and promote the early emergence of seedlings. 4 Select 2% Rikenxi and 20% triadimefon respectively according to 0.15% of seed amount and 0.2% mixed wheat seed. 5 acres with 75% pentachloronitrobenzene 1 kg, fine dry soil 5-10 kg, and have been mixed with the seeds of seed sowing, can prevent the bacteria in the soil infection.
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