Wheat total eclipse, also known as wheat blight and black foot disease, is a dangerous fungal disease and is a typical root rot and stem rot disease. In addition to infesting wheat, it also infects crops such as barley, corn, early rice, and oats, as well as grassy weeds such as toxic wheat, maiden, and bluegrass.
The disease conditions: the occurrence and prevalence of wheat total eclipse, and closely related to various factors such as cultivation system, soil fertilizer, land preparation method, wheat sowing date and variety. Mainly: the incidence of continuous cropping is heavy, the incidence of cropping is low; the soil fertility is low, especially the severely phosphorus-deficient plots are heavy, the soil is loose, and the alkaline soil is heavier; the large-scale planting of susceptible varieties is aggravated by the total erosion. The important reason is that the depth of the soil is shallow, and the incidence of shallow planing is heavy; the early onset of winter wheat is serious, and the late onset is light.
Symptoms of the disease: the seedling stage is short, the lower yellow leaves are more, the seed roots and the stems in the ground become grayish black, and in severe cases, the wheat seedlings die. During the jointing stage, the winter wheat disease seedlings had slower greening, less tillering, more yellow leaves, and most of the roots of the diseased plants became black, and a grayish black mycelium layer appeared on the base of the stem and inside the leaf sheath. After heading, the symptoms are most obvious. The diseased plants in the field are clustered or flaky. The early white ear and the diseased root become black and easy to pull up. The surface of the stem and the sheath of the stem are covered with tightly intertwined dark brown hyphae, which is black. Feet.
The prevention methods are as follows:
Deeply turn over the soil to reduce the effective bacteria in the soil surface. Reasonable arrangement of crops, planned to collapse, and crop rotation with cotton, potatoes, vegetables, etc., can significantly reduce the incidence. Adding decomposed organic fertilizer, using balanced formula fertilization technology, adding zinc fertilizer (1-1.5kg per mu) increases the disease resistance of wheat plants. Planting disease-resistant varieties, suitable for late sowing, reducing the chance of infection of the bacteria.
Dressing with pesticides. It can be mixed with 2% ricketts, or 50ml with 20% triadimefon (pust rust) emulsifiable concentrate, 50kg with wheat 2-3kg, mixed with 2-3 hours after sowing.
Spray control. In the rejuvenation period of the next year, 20% triazodone EC 100-150g per acre is sprayed with 60kg of water and spurted in the ridge, and it can be sprayed once again during the jointing period, which can effectively control the total disease hazard.
The above is the wheat total erosion prevention and control technology, for your reference, and hope to help you. Huinong School has more relevant agricultural technology knowledge, and continue to pay attention to the Huinong School to answer questions during the planting process.
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