Sorghum planting: how to control sorghum top rot?

How to control the top rot of sorghum? Please introduce the control methods of sorghum top rot, which mainly occurs from seedling stage to adult stage. The symptoms of top rot are as follows: seedling stage, top leaves of adult plants show chlorosis, deformity, wrinkle or distortion, and there are many transverse knife-cut marks on the edge. some are knife-cut along the main vein or on both sides of the leaf tissue. There are brown spots on diseased leaves, and the tip of 5 leaves or the whole leaf is withered at the top of 4 Mel leaves. In the later stage, the leaf is short or remains the basal part of the tissue, showing a tearing shape. The top leaves of some varieties are twisted or wrapped around each other, showing a long whip bending shape. The disease of leaf sheath and stem caused leaf sheath drying and stem softening or quenching. Inflorescence infected spike head short, light part of floret abortive, heavy whole ear not fruiting. The main ear infected early, resulting in the development of lateral branches, the formation of multi-headed ear, and the poor development of tiller ear. When the humidity is high, the disease produces a layer of pink mildew. The main transmission routes and pathogenic conditions of sorghum top rot: the pathogen overwintered with hyphae and conidia on diseased plants, seeds, diseased remains and soil. The disease can be infected at seedling stage and adult stage in the following year. The appropriate temperature for onset was 22 / 28 / ℃. During the onset of the disease, there is a lot of rainfall and the relative humidity is easy to aggravate the disease. The control methods of sorghum top rot are as follows: 1. Rotation of sorghum top rot has been carried out for more than 4 years. 2. Promote the application of microbial fertilizers such as compost retted by enzyme bacteria. Such as 5406 bacterial fertilizer, can reduce the disease. 3. The seriously affected areas were sprayed with 1500 times of 50% carbendazim wettable powder or 60% Fangmaibao ultrafine wettable powder and 1000 times of carbendazim at the initial stage of the disease. Click to get more sorghum planting technology click to get more grain planting technology