How to prevent diseases at jointing stage of wheat turning green. What are the tricks of farmers?

Spraying once can control sheath blight, underground pests and wheat spiders. To prevent and control sheath blight, 5% jinggangmycin can be mixed with 50-75 kg +050-200 ml of water per mu and sprayed on the bottom of wheat again at intervals of 10. Underground pests can spray 40-50g phoxim per mu at the base of wheat. The harm of underground pests in wheat leads to seedling shortage, and the control of underground pests is the basis to ensure the high yield of whole wheat seedlings. The main preventive measures are seed dressing with 50% 1605 EC, 75%39 1 1 EC, phoxim and 40% omethoate. Mix well and pile up for more than six hours before sowing.

In terms of diseases, there are four kinds of root rot diseases-sheath blight, take-all disease, stem base rot and root rot, and viruses such as yellow mosaic virus disease and dwarf mosaic virus disease, as well as latent fungi such as rust, powdery mildew and scab. Wait a minute. In terms of pests, the main pests that harm leaves are aphids, red spiders, midges and wheat leaf peaks, and the underground pests that harm roots are mainly white grubs, white grubs, needle worms and so on. They often cause the lack of seedlings and broken ridges of wheat, which has a great influence on the later yield.

If infected with root rot, the wheat seedlings will wither ahead of time, and if the stems rot, the diseased plants will die in the form of bacterial wilt. Wheat root rot is a parasitic fungus, which can overwinter inside and outside seeds and on diseased bodies. Root rot is the most important disease at seedling stage. When sheath blight, rust and other diseases and red spider occur at the jointing stage of greening, it is suggested to use abamectin plus bendazole or benomyl for spray control.

When using tribenuron-methyl, wild oats and milkweed should be sprayed in the middle and early stage, but the temperature should not be too high in sunny days to prevent the growth of wheat from being affected by a lot or high temperature. After jointing, it is absolutely forbidden to use herbicides and herbicides again to prevent phytotoxicity and weeds, and to manually pull them out. During this period, the main pests and diseases that often occur frequently are sheath blight, root rot, take-all disease, yellow dwarf disease, red spider and underground pests, among which sheath blight is more serious.