Beware of bacterial root rot in rice
First, the incidence of the law Bacteria can overwinter on diseased rice straw, diseased rice piles, and weeds. Germs can invade from water holes, wounds, and sheaths and root wounds on the leaves. Roots and bases of the stems were the main invasive wounds, and they invaded in the stomata of the rhizome and invaded after the infestation, and were repeatedly infested throughout the growth period. Second, the source of bacteria and symptoms The bacteria is bacteria of the genus Eubacterium. Major damage to the root and root base of rice, the incidence of rice in the tillering period. Occurrence of water-stained elliptic lesions on the leaf sheath of the base of near surface soil, which gradually spreads to the edge brown, the middle of the white irregular large spot, stripping the leaf sheath visible root section dark brown, sometimes visible dark brown longitudinal strips, Root rot, accompanied by foul odor, plant leaves dry yellow. The leaves at the knob stage turned yellow from bottom to top, and the edge of the leaf sheath near the water surface was brown. A gray long stripe grows in the middle and the color of the root section is accompanied by foul odor. At the beginning of the ear period, the diseased plants lost their water and dried up to form the dry booties, white panicles, and semi-white panicles. There was a short and less lateral root discoloration in the root section with bad odor. The unique symptom is that the root of the diseased plant turns brown or dark brown rot. Third, prevention and control technology 1. Select disease-resistant varieties such as Eke 1 and so on. 2. Breed strong seedlings on the basis of seed selection and drying, and use strong chlorine soaking to promote planting seedlings. Appropriate application of phosphorus and potassium fertilizer to ensure strong seedlings and seedling transplanting machines. 3. Promote the use of organic fertilization for paddy crop rotation and fertilization. 4. Chemical control 50% Chlorobromide isocyanuric acid (determined amine), Epimedium, Agricultural antibacterial 120, Agricultural streptomycin, Copper noble, Thiobacillus copper and other agents for prevention and treatment. And sprinkle lime comprehensive soil acid inhibition bacteria, reduce hazards. While spraying fungicide pesticides, increase the application of phosphorus and potassium fertilizers. Note: depending on the severity of the condition, use an agent to spray once every 5 to 7 days. The severely affected field sprays 2 to 3 times. In addition, the field needs to maintain a shallow water layer to improve plant root conditions to reduce the incidence.
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