Sorghum planting: how to control sorghum smut?

Loose smut often occurs in planting sorghum. How to prevent and cure sorghum smut? Please introduce the method of sorghum loose smut in the seedling stage, the symptom is not very obvious, but the plant is a little shorter, the color is slightly dark, and the heading is earlier. After heading, the rachis and branches were intact, the glume protection increased significantly, and the whole panicle grain turned into an oblong gall with a layer of white film and a large amount of black powder. After the gall matured, the film ruptured and the black powder dispersed, revealing the black residue and glume protection. Some of the seeds become fungus galls, and the rest are not fruiting. The disease is mainly carried by soil and seeds, but mainly by seeds. The pathogen can survive outdoors for a year, and its pathogenicity decreases after overwintering in the soil. After sowing, the pathogen invaded the sorghum seedlings from the wound, epidermis and young roots and spread to the growing point of sorghum. During heading, the pathogen entered the ear, destroyed the ovary and formed galls. The occurrence of the disease is related to the resistance of varieties, the number of bacteria in soil and seeds, and the unearthed speed of seedlings. Sorghum loose smut can be controlled with reference to the following methods: first, select disease-resistant varieties. Farm varieties are generally not resistant to disease. The main resistant or immune varieties are introduced foreign varieties, such as Fanong No. 1, Meihong, whitening, precocious Hengali, Hengali and so on. Second, timely sowing and improving sowing quality, early sowing, dry soil, poor quality of soil preparation and overthick soil cover will prolong the time of seedling emergence, increase the chance of infection and aggravate the disease. Therefore, it is generally necessary to sow as late as possible under the condition of maturity, and the soil moisture before sowing is suitable, the soil preparation is fine, and the soil covering depth is suitable, so as to ensure early emergence and strong seedlings, shorten the infection time of buds and reduce the occurrence of diseases. Due to the fact that the pathogen can only survive in the soil for one year, proper rotation in the disease area can effectively reduce the damage. Fourth, remove the diseased plants and reduce the source of bacteria in the following year. Fifth, seed treatment is mainly seed dressing to eliminate germs on the seed and in the rhizosphere soil around the seed. ⑴ 50% verapamil powder 350g seed dressing 50kg, or 16% verapamil EC stuffy seed (same as sorghum head smut). ⑵ 50% and 70% pentachloronitrobenzene powder 300g seed dressing 50kg. ⑶ 50g carbendazim wettable powder 350g seed dressing 50kg. ⑷ 50% carbendazim wettable powder 350g seed dressing 50kg. In addition, seed dressing with antibiotic bacteria 769,775 and 3013 has a better effect on disease control. Click to get more sorghum planting technology click to get more grain planting technology