How to control cotton blight

Cotton Rhizoctonia solani, also known as root rot, black root disease, the pathogen is Rhizoctonia solani. Infection of pathogen before seed germination can cause rotten seed, and infection after germination to pre-unearthed can cause rotten bud. After the cotton seedlings were unearthed, the yellow-brown disease spot appeared at the base near the soil surface at the initial stage, and the disease spot gradually expanded and surrounded the whole base. Zhang Chuanyi, a senior agronomist, said that cotton blight is also a kind of soil-borne fungal disease in cotton seedling stage. after picking off the plastic film, the adaptability of cotton seedlings is not good because of changes in the environment, coupled with the fact that the weather at that time is often low temperature, overcast and rain, and the ground temperature is low, so the disease is easy to occur. The mycelia, sclerotia and seeds on the soil are the primary infection sources of cotton blight. After sowing, the emergence of seedlings is slow, the growth is weak, and it is easy to be infected by bacteria, and the cotton cotyledon stage is the most susceptible to disease. Zhang Chuanyi told reporters that the prevention and treatment of blight is root irrigation or foliar spraying, and it is best to walk slowly when foliar spraying, so that the liquid can infiltrate into the rhizome, so that the occurrence of blight can be prevented. Foreign prescription 1: seed dressing, 10 jin cotton seed soaked and mixed with 2116 days a bag, 2 to 3 jin of water + 0.5g 99% carbendazim, sow seeds after drying, do not sow. Prescription 2: 50% carbendazim 800 times or 70% methyl topiramate 800 times + 70% mancozeb 600 times. Prescription 3: 2116 Zhuangmiaoling 600x + 99% carbendazim 3000 times foliar spraying root irrigation.