Recently, a farmer friend often asked: What is the yellowing of wheat leaves? Is wheat sheath blight occurring? Rhizoctonia does cause yellowing of wheat leaves, but it can cause yellowing in early spring wheat leaves. The reasons that can cause yellowing of early spring wheat leaves can be summed up in the following three categories: (1) lack of fertilizer or temperature and humidity disorders; (2) root injury, and the root damage may be insect and toxic material contamination: (3) roots, Stem base and leaf sheath disease, such as root rot, total erosion and sheath blight. Because of the different symptoms they exhibit and the different mechanisms of formation, we can differentiate them step by step. First of all, we must dig out the roots for observation. If there is a broken root, the root is usually caused by underground pests, and the rot (blackening and browning) may be affected by root rot, full-bleeding bacteria, or poor soil permeability. If the roots are basically normal, but the roots are short, the number is small, the color is dark brown, the root hairs are sparse, the growth in the shoots is slow, and the plants are thin, you can doubt the lack of nitrogen and phosphorus; if you also find soil compaction, drought or waterlogging, you can Suspected is the problem of soil and rainfall (snow). The characteristic diagnosis of wheat sheath blight should be on the ground, which is a moire-like spot on the leaf sheath; yellowing leaves mostly occur in the old leaves and are easily confused with the natural aging of the lower leaves; the pathogens infect the stems. The part formed brown fusiform spots, which eventually resulted in lodging and withered ears; in the wet weather or in plants with excessive plant density, some white mycelium and light tan nucleus could be observed in the sheath or even between the plants. Here we talk about how to control wheat sheath blight. If wheat sheath blight occurs, it is necessary to take chemical control in time. The so-called promptly is to catch the spray before the jointing of wheat or early jointing. Can choose 5% Jinggangmycin water (powder) agent 100 grams of water to 75 to 100 kilograms, 70% thiophanate-methyl (thiophanate-methyl) wettable powder 75 grams per acre, 25% of the enemy off (C ring Azole) EC sprays 20 to 30 ml of water per mu. Severe disease fields must be controlled once every 15 days. In addition, to use drugs rationally, the drugs must be in place, must spray the syrup on the leaf sheath of the wheat stem base, and to use drugs as soon as possible and against the amount of water, if sprayed with a hand sprayer, water can not be less than 60 kg per mu. Commode With Wheels,Rolling Shower Commode Chair,Pvc Shower Chair With Wheels,Bariatric Rolling Shower Chair Active Life Healthcare Co.,Ltd , https://www.alh-med.com