When is the best time to kill wheat herbicide?

When is the best time to kill wheat herbicide?

The best spraying time of wheat herbicide is the spring wheat growth period, when the temperature is moderate and stable, and the comprehensive judgment is made by considering the factors such as weed age, weather, soil moisture and variety selection.

1. Temperature:

The effect of herbicides is closely related to temperature. When spraying herbicides, the temperature shall not be lower than 65438 00℃, so as to avoid low temperature affecting the efficacy.

2. Grass age:

The age of weeds also affects the effect of herbicides. Generally speaking, when weeds grow to 2-3 leaves, spraying herbicides is the best. At this time, weeds are sensitive to herbicides, while wheat is relatively tolerant.

3. Weather:

Spraying in windless or breezy weather can prevent drugs from floating to other sensitive crops. At the same time, avoid spraying herbicides before it rains or in the weather where it is expected to rain, so as to reduce the impact of rain erosion on drug efficacy.

4. Soil moisture:

Soil moisture is also an important factor affecting the effect of herbicides. Too dry soil will reduce the growth rate and sensitivity of weeds, thus affecting the effect of herbicides. Therefore, soil moisture should be ensured to be moderate before spraying herbicides.

5. Variety selection:

According to the local weed species and climatic conditions, select the appropriate herbicide varieties. Common herbicides are butachlor and isoproturon. These herbicides can effectively remove a variety of weeds, such as milkweed and wild oats.