Herbicides are a kind of pesticide that is often used in agricultural cultivation, but some friends are not satisfied with the effect after use. So is there a way to enhance the effectiveness of the herbicide? This article will introduce you how to maximize the effectiveness of the herbicide.
1. The relationship between application and climate. When the weather is dry or the wind speed is high, the application will increase the evaporation and drift of the liquid. The amount of liquid attached to the weed surface and the soil surface will decrease, resulting in a decrease in herbicidal effect. The weather conditions in dry and windy conditions should be avoided. Apply underneath.
2. The relationship between application and temperature. Many herbicides have enhanced activity under high temperature conditions, and the activity is lowered under low temperature conditions, and the speed of dead grass is slowed down. Generally, the average daily temperature is greater than 8-10 ° C to benefit the drug. However, some herbicide varieties can still obtain good herbicidal effects when applied at a daily average temperature of about 5 °C.
Such as benzoxazole, acetyl oxalic acid, tribenuron, oxadiazon and the like. Before winter, the average daily temperature is about 5 °C (no ice at night is good), and good weeding effect can still be obtained after winter.
The use of isoproturon should be applied to the cold-tailed warm head, and the application should be stopped 2-3 days before the cold current, otherwise it may cause freezing damage.
3. The relationship between application and humidity. Whether it is soil closure or stem and leaf treatment, it is necessary to have suitable soil moisture. Under drought conditions, it is not conducive to the efficacy of the drug, and should be avoided under too dry conditions.
4. The relationship between application and water consumption. The amount of water used during the application depends on the amount of the drug solution and the uniformity of the application, thus affecting the herbicidal effect. The application of the herbicide requires no heavy spray or no leakage, and the repeated part is easy to cause phytotoxicity, and the weeds in the place where the spray is leaked are not dead. According to practical experience, when the soil is closed and weeded, the amount of liquid used for the acre is 45-60 kg (manual sprayer 3-4 barrels of water), and the stem and leaf treatment agent is 30-45 kg (2-3 barrels of water). .
5. The relationship between application and land preparation quality. The surface of the soil is finely divided and flat, which is conducive to the formation of a drug film by the liquid medicine, and the herbicidal effect is good. The soil surface is not flat, and the soil block is not conducive to the closure of the soil surface, and due to the freezing and thawing effect in winter, the large clods are broken, resulting in increased grass yield in spring and reduced herbicidal effect.
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