How to control take-all disease after wheat turns green?

Wheat take-all disease, also known as black foot disease, is a typical root disease. It can occur throughout the entire growth period of wheat, and the pathogen only infects the roots and the basal 1-2 nodes of the stem. The severity of the disease is affected by many factors. Continuous cropping and repeated cropping make the disease severe; when wheat and summer corn are grown twice a year and continuously for many years, the disease occurs severely; low soil fertility and an imbalanced ratio of nitrogen, phosphorus, and potassium, especially in phosphorus-deficient plots, make the disease severe; rainy springs and high soil moisture are conducive to the disease.

Soil treatment: In plots where wheat take-all disease occurs severely, use 1 kg each of 50% carbendazim and 15% triadimefon wettable powder per mu, mix evenly with 30 kg of fine soil, spread on the ground surface, then plow, prepare the soil, and sow.

Seed dressing: You can use 50 ml of 3% diweidan + 10 ml of 2.5% shileshi per mu, add 150 ml of water, mix evenly, and dress 10 kg of seed. Alternatively, use 20-40 ml of 12.5% quanshijing aqueous suspension concentrate per mu, dilute with 150 g of water, and dress 10 kg of wheat seed. After dressing, pile and cover for 3 hours, then dry and sow.

Chemical root irrigation: For diseased fields that have not undergone chemical soil treatment or seed dressing, at the three-leaf stage, green-up stage, and jointing stage of wheat, use 200-300 g of 20% triadimefon per mu, dilute with 100 kg of water, and use a sprayer (with the nozzle removed) to spray-irrigate the liquid along the wheat rows so that the liquid penetrates into the roots through the wheat seedlings. This can greatly reduce the severity of wheat take-all disease damage.