How to avoid herbicide damage to wheat weeding in winter

After entering the winter, the temperature drop is more obvious, when the crops are basically in hibernation and stop growing period, but this winter temperature is still relatively high, the recent temperature has increased, many farmers also carry out wheat field management, especially weeding. But when weeding, we should also pay attention to drug damage, so how to avoid drug damage in wheat weeding? Let's get to know it.

First, how to weed wheat to avoid drug damage?

1. Ensure that there is no frost after application.

Although the recent weather is sunny and the temperature is suitable, the temperature difference between day and night is still relatively large, so when using herbicides, we must always pay attention to weather changes and there can be no frost. Because weeds and wheat will be harmed after spraying herbicides, but because herbicides are added to make wheat safe. If the phenomenon of frost and sharp cooling occurs after spraying, then the safety agent can not play its due role, can not detoxify and cause drug damage.

2. Keep the application above 5-8 degrees.

Wheat herbicides are sensitive to temperature, if the temperature is too low, it will not only affect the weed control effect, but also cause drug damage. For wheat herbicides, the higher the temperature is, the more favorable the weed absorption is, but the temperature in winter is generally not very good. Therefore, it is more appropriate to choose the daily average temperature of 5-8 degrees.

3. Pay attention to the spraying time

When using herbicides for weeding, it is best to do it after 9 a.m. and before 3 p.m., because the temperature is high during this period, and the conditional dew is basically evaporated, which is beneficial for the liquid to adhere to the weeds. Moreover, because the light is sufficient and the stomata of weeds are open, it is very easy to absorb water and solution, and the weeding effect is obvious.

4. Thin seedlings are not suitable for drug use.

Spraying should also be combined with the actual situation, that is, the sowing is prolonged or the seedlings should not be used, otherwise the drug damage will be aggravated. In addition, chemical weeding can not be carried out for the weak seedlings and yellow seedlings caused by the straw returning to the field.

II. Remedial methods for drug damage

After the occurrence of drug damage to wheat, brassinolide + potassium dihydrogen phosphate, amino acid foliar fertilizer + potassium dihydrogen phosphate, biological stimulating hormone + potassium dihydrogen phosphate should be sprayed in time to repair the damaged tissue. After that, we can choose to water or rain and apply chelated zinc fertilizer plus urea to promote root recovery as soon as possible, ensure safe overwintering and ensure rapid growth after the beginning of spring.

The above is the introduction of winter wheat weeding how to avoid drug damage, hope to help you, want to know more related knowledge, please follow us.