Sagittarius scientific name Sagittaria trifolia L. The common name is scissors grass, belonging to the Alismaaceae family. Use herbs and bulbs as medicine. With heat to stop bleeding, detoxification swelling, Sanjie effect. It is also a kind of vegetable in autumn and winter. Most of them are planted in paddy fields after rice is harvested. Distributed in the provinces of north and south of China. Symptoms mainly affect the leaves, petioles, flower organs and bulbs. The yellowish to orange-colored leaves on the leaves had a slightly raised ecchymosis. After the plucked spots, the yellow spots broke and black powder particles were scattered, which were the spores of the pathogen. Some sickly deformed leaves. Petioles produce spherical tumors or produce black streaks. Floral victims, ovary dark brown. Damage to bulbs occurs at the base of the plant and the stems and knots of the Portuguese, resulting in cracking of the bark. When the incidence of plant leaf reaches more than 60%, the yield is reduced by 20%-30%. The pathogen, Doassansiopsis horiana (P, Henn.) Shen, said that the mushroom M. globosum is a basidiomycotina fungus. The sporophores are arranged one layer, subglobose to oval, and the size is 77-21867-188 (μm). The outer layer of the sporulation group and the central system are infertile, the middle is a spore layer, the outer layer is composed of 3-4 colorless polygonal cells, and the central cell wall is thin and light olive-brown. The spores are tightly bound, long and horny, smooth, red-brown, and 10-177-10 (μm) in size. Transmission routes and pathogenic conditions The pathogens overwinter as the spore masses fall in the soil or attached to the bulb. In late spring, the average monthly temperature is higher than 15°C, sporangial groups produce spores that germinate, and initial infection occurs through airflow, rain, or field water spreading, and sporulation occurs in later diseased areas for repeated infections. Variety resistance is different; Partial application of nitrogen fertilizer, plant growth and green fields and continuous crops early and heavy; high temperature and humidity is the main factor of the disease; excessive dense planting disease. Control methods (1) Select bulbs from disease-free fields at harvest. (2) Adapt to local conditions and change resistant varieties. (3) Carry out rotations and make them densely planted. (4) Do a good job in field health. After harvesting, it is necessary to thoroughly collect the remains and burn them. (5) Strengthen water slurry management, avoid long-term deep irrigation, achieve dry and wet, promote root development, and enhance plant resistance. (6) Spray 15% Triadimefon WP 1 000 times or 80% Antibacterial Agent 402 Emulsion 1500 times, 25% Carbendazim WP 600 times and 75% chlorothalonil WP 600 Times of liquid, 50% of Mobile WP 500 times, 40% of Sulphur Suspension 500 times, 1:1.5:200-250 Bordeaux Liquid, once every 10 days, continuous control 2-3 times. China leading manufacturers and suppliers of Active Pharmaceutical Ingredient, Mupirocin , Mupirocin Calcium, and we specialize in Sodium Fusidate, Fusidic Acid. Active Pharmaceutical Ingredient, Mupirocin, Mupirocin Calcium, Fusidic Acid, Sodium Fusidate Manufacturer Fuzhou Contay Biotechnology Co., Ltd , https://www.contaybio.com