Whole wheat rot disease is a devastating disease, and it has now become the enemy of wheat production, which can reach 30% to 70% or even be absent. The earlier the wheat is affected, the greater the loss of yield. Should pay attention to. First, the onset of the disease can be the disease in the whole wheat growth period, is a typical root disease, the bacteria only infect the roots and stem base 1 to 2 Department. After the onset of the seedlings, the plants became dwarfed with more yellow leaves in the lower position and fewer tillers. Similar to drought-fat deficiency, the primary roots (seed roots) and rhizomes turned grayish black, and the secondary roots of severely infected plants also turned black, causing serious strains in the whole plant. Conjoined dead. Jointing period of winter wheat disease seedlings is slow and has little tillering, and most of the roots of the diseased plants turn black. The diseased ear during the filling stage showed "white spikes", with the roots becoming dark and showing a "black foot" shape. After the color was darkened, it was "black plaster". It was easy to pull up, but it was not easy to fall down. It was a symptom unique to the adult stage. Second, prevention and control measures (a) agricultural control measures Strict quarantine. The protection of disease-free areas is forbidden from the wards to prevent the introduction of diseases. 2. Reduce bacteria source. For sporadic epidemics, we will continue to blockade on the spot and eliminate it on the spot. Incidence fields must be singled and singles must be collected. Wheat harvested is strictly prohibited, and wheat stalks and wheat stubble can not be returned directly to the field. It is best to harvest the sorghum and then remove the diseased roots and incinerate them. This will not reduce the source of bacteria. 3. Reasonable rotation. For the severe occurrence of wheat full-blown disease land, the crop rotation can be implemented, the implementation of wheat, wheat and Other crop rotation, to cut off the accumulation of germs, to control the development of the disease. 4. Rational fertilization. The base fertilizer increased organic fertilizer and biological fertilizer to increase soil organic matter content. Fertilizer application should pay attention to the ratio of nitrogen, phosphorus and potassium. (b) Pharmaceutical Control Measures 1. Soil treatment. Before sowing, we can use 16% Ketone WP wettable powder (without disease) 800g produced by Henan Province Dadi Agrochemical Co., Ltd., mixed with 20-30 kg of fine soil, evenly applied on farmland or mixed with large chemical fertilizers. , Such as the prevention and control of underground pests, can be mixed with pesticides, with the sprinkling with cultivation. 2. Dipping and dressing. Available 12.5% ​​full eclipse net (produced by the US Monsanto company), 20 grams per mu, mixed with 8 to 10 kilograms of seeds, boring for 6 to 12 hours, aired and sown. 3. Topdressing. Without chemical soil treatment and seed dressing, the disease-free large bags (800 g) with fine soil of 10-15 kg can be applied by top-dressing after the wheat emerges. The use of the above prevention methods for continuous use for 2 to 3 years can fundamentally eliminate the full-blown wheat disease. (Shijiazhuang City Plant Protection Station)

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