What is sorghum charcoal rot? How to prevent?

What is sorghum charcoal rot? How to prevent and cure? Please introduce the symptoms of sorghum charcoal rot: sorghum can occur during the whole growth period. Infection with the disease can lead to seedling blight or root rot. The root was watery at first, then blackened, the internal tissue collapsed, the cortex rotted and extended to the lateral root. Stem infected plants mature early, spike small grain chaff, easy to break down in case of wind. After the internal tissue of the stem disintegrated, the vascular bundles remained, in which there were a large number of black sclerotia. Sorghum occurs in all producing areas in China. The pathogen of sorghum charcoal rot is called Phaseolus vulgaris: a subphylum fungus. The conidium is dark brown, globose, newly buried, dispersed, 89 ~ 275um in diameter, gourd-shaped, colorless, 5 ~ 13 × 4 ~ 6 um in size, and 16 ~ 32 × 5 ~ 10 um in size, colorless, Terete or fusiform. Sclerotia are black, hard and 5-100um in diameter. The transmission route and incidence condition of sorghum charcoal rot: the pathogen overwintered in the soil with mycelium or sclerotia. The next spring conditions are suitable for the production of conidia, spread by Rain Water sputtering, spore germination for primary infection, causing seedling or adult plant disease. The conidia produced in the disease department were re-infected many times by wind and rain. High temperature and humidity in the field, low-lying terrain and high soil moisture are beneficial to the occurrence of the disease. The control methods of sorghum charcoal rot are as follows: (1) remove the disease residue in time after harvest and concentrate on deep burial or burning to reduce the source of bacteria. (21) rotation with rice and wheat if possible. (3) for compost retted by enzyme bacteria, pay attention to the application of potassium fertilizer to enhance the disease resistance of the host. (4) lignin Trichoderma has strong inhibitory effect on this bacteria, so it can be mixed with cake fertilizer to make antibiotic fertilizer. (5) if necessary, spray 50% copper succinate (DT fungicide) wettable powder 500x liquid or 80% Xinwansheng wettable powder solution, once every 10 days, continuous prevention and treatment for 3 times. Click to get more sorghum planting technology click to get more grain planting technology