The best time for chemical weeding in wheat fields this year should be from mid-late November to early December. During this period, wheat has the strongest drug resistance. Weeds are the most sensitive to herbicides and have the best weed control effect.

Control methods

1. Control weeds mainly composed of sow wormwood and leeks, and herbicides containing tribenuron-methyl component may be selected. The amount of 10% of tribenuron-methyl was 15 grams. The S. sobria land mass may be supplemented with 10% bensulfuron-methyl powder 10 grams or 56% dimethyl-tetrachloro-sodium salt powder 30 grams of mixed spray per acre.

2. Weeds that prevent Zebra (cat's eyes) and swine fever (swollen puller), etc., may optionally contain herbicides containing fluorofluoroacetic acid. The amount of 20% chlorofluoroacetic acid is 35 ml.

3, control of wild oats may contain optional herbicides. 6.9% spermatozoa frazoxime 50 ml.

Precautions

1 In the winter wheat field, the average temperature of the chemical weeding should be above 5°C for three consecutive days. It should be selected for prevention and treatment at sunny noon, no wind, no exposure. 2 acres of water to ensure that more than 30 kilograms, liquid medicine to mix evenly. Apply to the grass. 3 spray should be uniform, avoid heavy spray, missed spray, wheat fields near other crops, as far as possible to reduce the nozzle to prevent drift. 4 Pay attention to the cleaning of mechanical tools after spraying to avoid phytotoxicity.

In addition, some wheat fields also have the hazards of pests, aphids, spider mites, sheath blight, etc. Prosperous plots should adopt mechanical repression, deep cultivator or spraying 15 percent paclobutrazol or 15 grams of Zhuangfeng'an.

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