Can wheat weeding be carried out at a low temperature? The effect is good above 10 degrees.

It is best not to use wheat herbicides when the temperature is low, at this time, the application of herbicides will not only affect the weeding effect, but also cause drug damage, the more suitable temperature is more than 10 ℃, the higher the temperature, the better the weeding effect, so it is recommended to choose sunny days from 10:00 to 15:00.

Can wheat herbicides be used at low temperatures

1. General growers know that wheat herbicides require higher temperature. If the temperature is too low, it will affect the weeding effect and cause drug damage. We must pay attention to it when using it. If the herbicide is marked with 2 ℃ or 5 ℃, it means that the temperature can be used above the marked degree. However, try to do it when the temperature is high, at least to 10 ℃.

2. Wheat sown in the first and middle of October can generally be sprayed with herbicides when they grow 3-5 leaves, probably in the first and middle of November, when the temperature is higher, about 20 ℃, which is more conducive to the effectiveness of herbicides.

3. If the wheat is sown late, it is probably when the wheat grows 3-5 leaves, that is, at the end of November or early December, when many winter wheat planting areas begin to cool down, such as Henan, where the temperature is between minus 1 ℃-7 ℃ and there will be light rain, this time is not suitable for spraying wheat herbicides.

4. According to years of planting experience, when the noon temperature is more than 10 ℃, it is suitable to spray wheat herbicides. The higher the temperature, the better. In the basic winter wheat planting area, it is difficult to have a high temperature of 30 ℃ at this time. If you look at the average temperature, the average temperature in a day should be more than 6 ℃, and the higher the temperature, the better. It is very difficult to have high temperature in the basic wheat planting area.

Second, the time to control wheat weeds

The main results are as follows: 1. The best weeding period is in the wheat seedling stage, about the middle and late November, and the rejuvenation period from the end of February to the beginning of March.

2. In the wheat seedling stage, the grass age of weeds is younger and the resistance to drugs is small, so it is easy to control, and the weeds can be removed without too much use.

3. In the rejuvenation period, the age of weeds increases and the drug resistance is strong, so the use of weeds needs to be increased, which increases the cost of drug use.

Matters needing attention in the use of herbicides

1. It is recommended to spray the medicine on a sunny day, after 10:00 in the morning, or before 15:00 in the afternoon. If the soil is dry, water injection should be carried out in time.

2. Spraying herbicides in windless weather can not only ensure the efficacy of herbicides, but also avoid herbicides damage.

3. In the application, we must pay attention to the temperature change, because the herbicide can play a role, need a certain amount of time, in order to better ensure the efficacy, it is better to look at the weather forecast before the application, and there should be no rain within a week.

4. in the application, the liquid must be mixed evenly, and in the process of application, do not re-spray and leak spray, in order to ensure the effect of weeding.