Symptoms are commonly referred to as cotton root disease, rot, root fold disease. The main damage cotton seedlings. When the longitudinal stems of young stems and stems are infested, they rapidly spread around the stems one week later, causing them to shrink and become rotted or root rot. Cotton seedlings lose water faster and generally do not fall flat. Dead seedlings are easily pulled out of the soil, and sparse filaments and small soil particles adhering to them are visible on the base or roots. Infected seeds cause rotten or rotten buds, and the diseased seeds are mostly brown and soft rot. When they are squeezed, yellow-brown mucus flows out. Invasive cotyledons and young leaves form irregular brown necrotic spots and dry perforation. When the humidity is high, sparse white mycelium is visible in the diseased part, and a brown sclerotia adheres to it. CeshiguanjianziCeshiguanjianziCeshiguanjianziCeshiguanjianziCeshiguanjianziCeshiguanjianzi Ceshiguanjianzi Ganzhou Green days Biochemical Technology Co., Ltd. , https://www.tlqcjs.com
Rational rotation and rotation of grass crops for 2 to 3 years or more. Reasonable fertilization, fine soil preparation, increased organic fertilizer and 5406 bacterial fertilizer. Cotton seeds were sowed before sowing, and 50% carbendazim wettable powder or seeds were reseeded with a seed weight of 0.5% to 0.8%. Promote the use of cotton wool coat, can be early emergence of 3 to 4 days, reduce the incidence. For early sowing, spring cotton should be sown at a depth of 5 cm at a soil temperature of 14°C and sown at a depth of 4 to 5 cm. Strengthen seedling management, appropriate early seedlings, timely early cultivator, pay attention to reduce soil moisture, increase ground temperature, cultivate strong seedlings, pay attention to drainage after the rain, to prevent moisture retention. After the onset of the disease, the roots were irrigated with 80% Tuzet or 20% pod wettable powder 1000 times, or 25% with 25% carbendazim wettable powder 500 times.