The pathogens invade from the lower part of the roots, causing pitting spots on the surface, brown hyphae, and sclerotia. The diseased tissue is rotted brown. Beet growth is susceptible to disease at low temperatures (13-14°C) in the early stages, and with temperature rising, 22°C is the optimal temperature for disease development.
Bacterial blight is caused by soil and seed bacteria. It is mainly based on soil bacteria. The most economical and effective measures for prevention and control should be seed treatment with pesticides, and corresponding agricultural technical measures should be taken to achieve better control effects. 1. Seed dressing seeds with 0.8% seed weight, such as Fairchild, Dixon, and Hymexazol (ie, 50 kg of sugar beet seeds with 400 g of 50% thimacrene wettable powder) have good control effects. If the seed weight is 0.8% of 50% thiram with 70% soil-blending agent (1:1) dressing, the control effect is better. 2. Reasonable rotation selection of the general election should generally be arranged for grass crops such as wheat, corn, etc., as far as possible without vegetable pods, soybean meal for the front rake. More than four years of rotation is adopted, and it is forbidden to repeat and chant. 3. Prepare for the work of soil preparation. During the harvest period of wheat and corn, it is necessary to carry out floppy or autumn tillage, fine soil preparation, soil moisture maintenance, and good soil structure. 4. The application of phosphate fertilizer as a fertilizer for sugar beets requires phosphorus crops. Increasing the application of phosphate fertilizer can promote the growth of seedlings and enhance disease resistance. 5. To grasp the sowing time and sowing depth should be planted when appropriate conditions, to grasp the appropriate depth of sowing, should not be broadcast too deep, to promote the emergence of fast seedlings, and the opportunity to feed pathogens. 6. Timely soil loosening and soil layer removal Beet seedlings will be loosened soon after unearthing, and the hardened layer will be removed, especially after rain, loose soil, can maintain soil looseness, enhance permeability of soil permeability, increase soil temperature, promote seedling growth, and promote growth, but also can reduce Blight occurs.
Bed Sheet,Surgical Bed Sheet,Nonwoven Bed Sheet,Disposable Bed Sheet
Xinxiang Huaxi Sanitary Materials Co., Ltd. , https://www.huaximedical.com