How to prevent sputum smut?

[ Agricultural Products Network] How to prevent cockroach white smut? White smut is mainly caused by the underground stems (shrimp shoots) of plants. The growth of the infected white plants is weakened, the leaves are widened, the leaves are dark green, and the leaves are black. Excavation of the underground stems (salmon shoots), found that the underground stems became shorter, the Ministry of inspection of the meat, found that the meat was short strips turned black (the spores of the undeveloped germs) or black powder (the spore heap of mature bacteria).

In the early stage of leaf sheath infection, the lesions are dark green dots, which later develop into elliptical knob-like protrusions. The later leaf sheaths are filled with black powder spores, making the sheath black. When the meat is infected, the black powder bacteria are filled with the white tissue, which makes the middle bulge, the meat strips become shorter, the outer surface has more longitudinal grooves, rough, and the meat is not edible when severe.

Whitening prevention method:

1. The field where the white-black powder disease occurs in the rotation should be rotated with the dry crops every year, which can effectively control the occurrence of diseases.

2. Select the sterile seedlings to keep the seeds in the disease-free fields, and insist on the selection of seedlings and planting of the excellent seedlings that are not strong.

3. Seedling treatment In the spring, the seedlings should be cut off from the top of the old pier, and the piers should be lowered to reduce the tillering position. If you introduce seedlings that are suspected to be unreliable. It should be disinfected with 25% carbendazim WP and 75% chlorothalonil WP (1:1) 600 times to eliminate the pathogens.

4, the removal of the dense branching in the early stage of the germination of the white old pier, the removal of the dense tiller, so that the nutrient concentration, germination and tiller uniform, easy to manage the field water layer, reduce the incidence of disease.

5. Strengthen the management of fertilizer and water. Apply sufficient organic fertilizer or 667 square meters (1 mu) of Shizhengfeng ecological granular fertilizer 100 kg as base fertilizer. According to the test, Shizhengfeng ecological fertilizer has less disease than nitrogen, phosphorus and potassium ternary compound fertilizer, and has a long-lasting effect. Adhere to scientific irrigation, manage the water layer according to different growth stages, avoid long-term deep irrigation, that is, according to the need to promote the tillering stage, inhibit the late tillering stage and promote the pregnancy period, to achieve shallow water 3-5 cm in the early stage of tillering, and combine Re-application of topdressing, 667 square meters of ternary compound fertilizer 30 kg, violent tiller growth; high temperature and high humidity control of fertilizer control, and deep water, inhibiting late ineffective tillering;

6, manual removal of diseased leaves combined with cultivating and composting and other agricultural operations, timely removal of the lower yellow leaves, diseased leaves, and carried out field destruction to enhance permeability.

7. For the early stage of drug prevention and treatment, spray the drug with 3% polyoxygen WP 600 times solution, or 1:1.5:250 Bordeaux mixture, or 25% triazolone WP 1000 times solution (safe interval) 3 days), or 25% carbendazim WP plus 75% chlorothalonil WP (1:1) 600 times solution (safe interval 7 days) alternate spray, spray once every 7 days, continuous Control 3-4 times, if the drug is used in the rainy season, pay attention to timely replenishment after the rain.

The above methods for prevention and control of sputum white powder disease are for your reference. Welcome to leave a message and exchange!