Wheat stalk smut is a fungal disease. The pathogenic bacteria will spread over the soil and manure along with the diseased plant residues, and they can also be spread over a long distance with the wheat seeds. The pathogenic bacteria infect the young shoots of wheat, and after reaching the point of growth, they can follow the growth of wheat and damage the whole plant of wheat, including stems, leaves and ears. The number of tillers in the diseased plant increased. In the early stage of disease, striped ridges parallel to the veins could be found on the leaves and leaf sheaths. The leaves did not stretch. From the jointing of wheat to the booting stage, the symptoms became obvious, the plants were obviously dwarfed and severely distorted, and the bulging part became black and cracked and black spores were emitted. Most disease strains cannot head and die prematurely. It is advisable not to be too late when investigating the disease in the field. It is best to do it during wheat booting. Two characteristics of wheat smut smut are closely related to the prevention and treatment: First, pathogenic spores can tolerate adverse environments, and can survive in dry soil for 3 to 5 years, which requires wheat and corn, beans rotation, especially For severe disease fields. If you change rice, you can eradicate it in a year. Second, pathogens can only infect wheat sprouts that have not been excavated. They are locally infected and have limited time. Therefore, measures such as fine soil preparation, proper shallow sowing, and timely seeding to promote the emergence of wheat and the emergence of seedlings all have a preventive effect. The focus of pharmaceutical control is also wheat sprouts and buds. Promote the use of disease-free seeds and seed dressing or seed dressing. In addition, the resistance of different wheat varieties to smut was very different, and resistant varieties could be selected. In the 1950s and 1960s, China relied on these measures to basically control the damage caused by smut. In recent years, the serious occurrence of the disease in some areas was mainly due to the relaxation of prevention and control work. In some areas it was caused by seed borne pathogens. In the early years, 70% pentachloronitrobenzene powder was used as seed dressing for seed dressing at 0.2% of seed weight, and 0.3% of seed weight was mixed with 50% hexachlorobenzene wettable powder, 70% Dixon powder, and 50% carbendazim. Wet powder, 50% phenyl WP, 70% thiophanate-methyl wettable powder, or 0.15% seed weight, 20% triadimefon, 0.1% to 0.13% seed weight, 15% seed dressing III Oxazoles also have good control effects. In recent years, experiments have proved that every 200 kilograms of wheat mixed with 2% rickazole (tebuconazole) wet mix 200 g or 2.5% of Chlorella (fluoxyloxin) 200 ml of seed coating can achieve better control effect. Stainless Steel Door Stop,Door Stops,Decorative Door Stops,Wall Door Stop Ningbo Hengchieh Locking Technology Co., Ltd. , https://www.hengchieh.com