Weeding in wheat fields should be the right medicine

In recent years, weeds in wheat fields have become an important factor affecting wheat yield. However, in order to achieve the desired results, it is necessary to understand the law of weeds in wheat fields and to use herbicides in a targeted manner. The best time to apply.

First, master the occurrence of weeds in wheat fields, grasp the best timing of application

In China, weed species in wheat field mainly include sage, leeks, piglets, mother-in-law, lacquer, Maijiagong, Wang Wuliu, Tianxuanhua, and Mai Niang. There are two unearthed weeds in the weeds, the first of which is generally before winter, 15-20 days after sowing of wheat, from late October to mid-November, and the second is March of the following year, that is, the wheat is greening to Before the jointing. Therefore, the best weeding period should be selected in the pre-winter seedling stage and the next spring returning stage.

Moreover, chemical weeding is carried out in winter, and even if the herbicide has a longer residual period in the soil, the underarm crop will not have a large impact. Weeding before winter can effectively avoid the adverse effects caused by the cold in the coming year. At this time, the temperature is suitable, and the herbicidal effect of the medicament can be more effectively exerted, and the dosage is small and the cost will be lower.

Second, the types of weeds in wheat fields have changed in recent years. It is necessary to prescribe the right medicine and rationally choose herbicides.

For many years, the control of broadleaf weeds in wheat fields in China has mainly benzosulfuron, 2, 4-D, dicamba and other agents. The long-term use of drugs has changed the types of broadleaf weeds in wheat fields, and the use of herbicides is increasing. It is getting worse. Recent experiments across the country have shown that the effects of bensulfuron-methyl and 2,4-D single agents on common weeds in wheat fields are not ideal, and Huayang Maishi, which is compounded by both, can not only produce drugs in a single dose. The shortcomings of the damage, but also achieved an ideal control effect on all kinds of wheat weeds.

Third, the main reason affecting the chemical weeding effect of wheat fields

1. Missing the best time to apply the medicine, when the grass age is too large, the medication is less effective;

2. When the outdoor temperature is too low during application, the weeds have poor absorption ability to the liquid, which results in greatly reduced herbicidal effect;

3. The amount of water is too small, and the liquid is not fully in contact with weeds;

4. The sprayer runs seriously, causing the loss of liquid medicine. (Dongping County Plant Protection Station Bu Fanping Wang Zhongbing)
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