With the modernization of agriculture, farmers also use a lot of high-tech products in agricultural production, a series of chemical products such as biological pesticides and pesticide mixtures, but the most popular pesticide products are herbicides. However, there are many varieties of herbicides on the market, and the application technology is also demanding. A little carelessness in the application will cause problems such as phytotoxicity and poor herbicidal effect. Then, how to master the selection of herbicide varieties and their application techniques is the key to improving the herbicide effect.

1. Choose the right herbicide.

Because each herbicide has a certain herbicidal spectrum, the effective herbicide should be selected according to the type of crops and the main species of weeds. At the same time, the herbicide should be selected according to the farming system. In addition, pay attention to mixing and alternating herbicides. Because the same herbicide is used continuously for many years, it is easy to lead to the gradual reduction of sensitive weeds and the increase of resistant weeds. Therefore, herbicides should be used in combination and alternately between years to achieve the purpose of long-term weed control.

2. Choose the best time to spray.

According to the nature of the herbicide, the period of occurrence of weeds, the growth period of weeds and crops, and the appropriate period of application should be selected. There are many varieties of herbicides, including stem and leaf treatment agents, soil treatment agents, contact herbicides, and biocide herbicides. Some are suitable for pre-emergence weedings, and some are suitable for stem and leaf weedings. Soil treatment involves spraying herbicides directly on the soil surface to kill newly emerged weeds. Therefore, it is very important to choose the best time to apply herbicides.

3. The effect of herbicide is proportional to the temperature.

When the temperature is high, the weeds have strong functions of absorbing and transporting herbicides, and the herbicide activity is also high, and it is easy to give full play to the herbicidal effect on the action parts of the weeds. The test results show that when applying herbicides, the higher the temperature of the air and soil, the more significant its efficacy, especially the herbicidal efficacy of stem and leaf treatment can be greatly improved.

Air humidity also has a significant impact on the efficacy of herbicides When the air humidity is relatively high, the application of stem and leaf herbicides can prolong the residence time of the herbicides on the weed leaves and help the stomata of the weed leaves to open, thereby absorbing a large number of herbicides and improving the weed control effect. After the soil treatment herbicide is absorbed, and it will be transported upward with a large amount of water, which is beneficial to inhibit photosynthesis and can significantly improve the herbicidal effect. Therefore, when using herbicides, the higher the humidity of the air, the more obvious the herbicidal effect; otherwise, the herbicidal effect will be reduced.