When is the right time for wheat herbicide?

Wheat herbicides are generally best sprayed when the soil moisture reaches 40%-60%. When spraying, be sure to control the amount and if there is a cooling within 3 days before the use of the drug, do not spray to avoid failure. The available agents are dimethyl disulfuron, fluazosulfuron, oxazolyl, alkynyl ester, ethyl carboxylate, thiophene sulfuron and so on.

What are the wheat herbicides?

In general, weeds in wheat fields can be divided into broad-leaved grass and Gramineae grass.

The main results are as follows: 1. Wheat field herbicides against broad-leaved grass: benzenesulfuron, benzosulfuron, azolidone, pyrimidinolachlor, difluorosulfonamide, dimethyltetrachlor, ethyl carboxyfluorosulfen, thiophenesulfuron and dimethylsulfuron.

2. Wheat field herbicides: dimethyl disulfuron, fluazosulfuron, oxazolyl and alkynyl ester, etc.

1. Oxazolidin

1. Gramineae herbicides are often used in wheat fields, such as Elymus japonicus, hard grass, wild oat, Elymus japonicus, ryegrass and ryegrass, etc., but the control effect of brome is not good.

2. The application period of Fenoxazol is similar to that of Triticum aestivum. It is suggested that it should be used in the 2-4 leaf stage of weeds. The later the time is, the worse the control effect is, especially after the emergence of tillers of weeds, it is even more difficult to control.

3. If you spray under the condition of low temperature, the leaves may turn yellow, which may be self-healing slightly. In serious cases, you can spray water, brassine or foliar fertilizer to alleviate it.

2. Alkynyl ester

The main results are as follows: 1. Alkynyl ester can be used in a wide range of fields, such as hard grass in wheat field, grass, wild oat, Niangmai, Niangmai and so on. For complex external environment, such as low temperature, it can also have a good effect, but the grass death rate of alkynyl ester will be relatively slow.

2. In general, the effect will be seen when the drug is used for about a week, and almost all of them will die in about 20 days. It is suggested that the weeds should be applied at 2-4 leaf stage, and the later the time is, the worse the control effect is.

3. In recent years, many farmers have responded that weeds have developed resistance to alkynyl ester, for example, the control effect of Niangmai and wild oat has decreased significantly.

III. Methyl disulfuron

The main results are as follows: 1. in general, methyl disulfuron is used to control Aegilops tauschii, which can control not only Aegilops tauschii, but also Gramineae weeds.

2. Its residual time is short and has no effect on crops.

3. The disadvantage of this drug is that the cost is high, about 30 yuan per mu, which may be higher, and its drug application technology is higher. If it is not used properly, it is easy to cause drug damage to wheat, such as low temperature weather, excessive and uneven application. Therefore, attention should be paid to reasonable application.

IV. Pyrimidine sulfonamide

1. Sulfochlor is also widely used, which can control not only sharp-leaf grass, but also a small part of broad-leaf grass, such as brome, wild oat and hard grass.

2. The drug is not very popular, so the drug resistance is not very high. If other herbicides show drug resistance, it can be used instead, which is relatively safe.

3. Its disadvantage is that if you encounter bad weather factors such as weak wheat seedlings and low temperature, it is easy to cause drug damage and the cost is high.

The above is the wheat herbicide when to play the appropriate relevant introduction, I hope it will be helpful to everyone.