HHY issued a letter on December 21st: I am Wanquan Town, Honghu City, Hubei Province. When a farmer removes wheat, he uses 3.6 percent of dispersible sulfonylutrione dispersible granules, 20 grams of 10% tribenururon-methyl, and 15 kg of 10% tribenururon-methyl to spray 15 kg of water per acre, plus paclobutrazol for pesticide application. Two days of frost weather occurred in the last 5 days, during which there was no rain. Now that wheat seedlings have this kind of situation, there are basically no white roots, and the heart can be drawn out. How can I remedy this?

Bayer CropScience's treatment of herbicides in crops and leaves of herbicides, Teslamax, is a 3% solution of disulfamerone, containing 3% methylsulfuron-methyl and 0.6% methylsulfuron-methyl, which can prevent small Common gramineous weeds and most broad-leaved weeds in wheat fields. The drug has high technical requirements for pesticide application, and production must be applied strictly according to the recommended dose, period and method. In the 3 to 6 leaf stage of wheat, grasses and weeds are basically released. When they are in the 3 to 5 leaf stage, they are applied as early as possible. Generally, 20 grams of preparations per acre and more than 30 kilograms of auxiliary additives are sprayed with water. In the case of waterlogging, drought, disease, alkaline soil, etc., which may cause the decline of the viability of wheat seedlings and the growth is inhibited under the unfavorable environment can not be used in the short term after the application of a substantial cooling temperature, otherwise the wheat will appear dwarf, fade Green and other phenomena. The drug should not be mixed with sulfonylurea drugs such as tribenuron-methyl, so as to avoid excessive sulfonylurea drugs causing phytotoxicity to wheat.

Paclobutrazol is a chemical control drug that has the effects of retarding plant growth, reducing longitudinal elongation, shortening internode length, promoting tillering, and improving lodging resistance, and has a strong inhibitory effect on wheat growth. Mixing it with herbicides in wheat fields will reduce the ability of the wheat seedlings to relieve the associated herbicides and increase the risk of herbicides to the wheat seedlings, especially when the seedlings are weak or in the case of strong cold temperatures after a short period of time. Wheat seedlings are easily damaged. In general, do not mix it with herbicides. In the case of strong wheat growth, it is appropriate to mix it with some of the safer herbicides. Generally, there is no adverse effect, but we must pay attention to the fact that it cannot meet the strong cooling temperature in the short term after application. The amount of paclobutrazol should be based on the wheat growth. The degree of flexibility.

The above-mentioned wheat fields encountered frost weather for five days after the application of methazofuran, tribenuron-methyl, and paclobutrazol, and wheat was prone to phytotoxicity and freezing injury, resulting in yellow wheat seedlings and impeded root development. Spraying on the damaged wheat seedlings such as brassinolide, BJP, AXR, propionyl lactonide, 0.3% potassium dihydrogen phosphate, 1% urea, etc., is beneficial to promote the recovery of wheat seedlings. Normal growth.

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