External factors affecting the efficacy of herbicides

1. Soil type: including soil composition, acidity and alkalinity. The higher the organic matter content in the soil, the more the drug is adsorbed, so the amount of herbicide used is different for the soil, and the acidity and alkalinity of the soil have an impact on the stability of the herbicide and the sensitivity of the plant to the drug.
2, soil moisture: it has a greater impact on the efficacy of the drug, such as Xi Majin, etc. under the conditions of the wet and wet conditions, the effect is easy to use, if the soil is dry and use the cable effect.

3. Air temperature: The air temperature affects the penetration rate of the drug and the speed of the drug, thus affecting the drug effect. Generally, the herbicidal effect is better at 20 °C or higher.

4. Air humidity: When the medicine is used, the air is dry, the weed pores are closed, and the drug effect is low, and vice versa.

5. Soil micro-organisms: Long-term use of a single herbicide, the micro-organisms that dissolve the drug in the soil increase, thus shortening the residual period.
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