The best time for weeding in winter wheat and wild wheat

The best time for weeding in wheat field in winter is from mid-November to early December, when wheat seedlings grow to 4 leaves. Generally, 30-45 days after wheat sowing, it is a better time to control wild wheat, that is, from November 1 to 20, the control effect is better, because at this time most of the weeds have come out, and the grass age is young, so it is easy to control.

The best time for weeding in wheat fields in winter

The main results are as follows: 1. We can choose from mid-November to early December, when the wheat seedlings grow to 4 leaves, which is the better time to weed in the wheat field, when most of the weeds have just been unearthed, the drug resistance is relatively poor, and the control effect is better. One application can basically control the weeds in the whole growth period, and has little effect on the following crops because of the early application time and less herbicide residue.

2. However, when using herbicides at low temperatures in winter, its efficacy is obviously longer than that when herbicides are used at high temperatures, and it generally takes 12-15 days for grass to wither, while in high temperatures in summer, the weeds in the field will all die within 5-7 days, so wait patiently after using the medicine. As long as the opportunity is grasped well and the liquid is sprayed in place, there is usually no need to re-use the drug.

3. When weeding, the dosage should be strictly controlled, and the amount of water should not be reduced at will. When spraying, it should be uniform, do not re-spray, do not leak, and all weeds should be sprayed with herbicides, otherwise it will be futile and ineffective.

4. If the dosage of herbicides is relatively large, it will cause drug damage to crops, easy to cause pollution, and even have adverse effects on subsequent crops, if the dosage is relatively small, the effect on weed control is poor, and it can not play the role of weeding and wheat protection for a long time, so it is necessary to strictly master the dosage when using herbicides, usually 30-40kg per mu.

5. When using herbicides, it is necessary to strictly follow the technical operation rules, because the temperature in winter is relatively low, and the police are accompanied by strong winds, so it is not conducive to the exertion of the efficacy, and it is necessary to apply the herbicide when the temperature is relatively high in sunny days. At this time, the physiological metabolism of weeds is more exuberant, which is conducive to the transmission of agents in weeds, and the weeding effect is better.

The best time for wheat to get rid of wild wheat

1. Generally, 30-45 days after wheat sowing, it is a better time to control wild wheat, that is, from November 1 to 20, the control effect is better, because most of the weeds have come out, and the grass age is young, so it is easy to control.

2. In recent years, the occurrence of wild wheat has become more and more serious. People often say that wild wheat is actually divided into brome, wild oat and Aegilops. Because it is often unclear which kind of wild wheat is used improperly, resulting in more and more wild wheat, seriously affecting the yield of wheat.

3. According to the investigation, brome is the main wild wheat variety in Shandong and Hebei, followed by wild oat and hard grass. Although prevention and control is carried out every year, it not only does not get rid of the roots, but also tends to increase and expand.