First, a reasonable choice of pharmacy.
Chemical weeding in vegetable fields should select suitable herbicides according to the different types of vegetables and the mechanism of action of herbicides. For example, fluridine is a pre-sowing soil treatment agent, which mainly acts on grass weeds and can be used for weeding vegetables such as eggplant, pepper, tomato, cabbage, rape, cabbage, and broccoli.
Second, choose the correct method of application.
The chemical structure and mode of action of herbicides determine the application method is different, some are only applied to soil treatment before sowing, some can be used for pre-emergence treatment, some are only suitable for post-emergence stem and leaf treatment, so choose Use appropriate and effective methods and use them with caution.
Third, choose the appropriate concentration.
The application concentration of the herbicide is related to many factors, such as soil texture, sunshine, humidity, temperature, etc. According to the external comprehensive factors and the instructions for the use of the herbicide, it is reasonable to select the application concentration.
Fourth, determine the amount of medication.
1. Determine the amount of herbicide according to different soil texture and organic matter content. The herbicide efficacy of soil treatment decreased in the order of sand, loam and clay. The content of organic matter was related to the amount of herbicide. When the soil organic matter content was 2.5-5%, it was positively correlated. Therefore, the amount of herbicide should be determined according to the soil texture and organic matter content.
2. Determine the amount of herbicide based on soil water content. When the soil water content is high, the amount of dissolved reagent is large, the leaching property is large, the soil adsorption amount is small, and the drug effect is high; when the soil moisture is large, the air humidity is also large, the leaf pores are easy to open, the drug effect is easy to play, and the medicament can be appropriately reduced. The amount used.
3. Determine the amount of herbicide according to the ambient temperature. The efficacy of most herbicides is positively correlated with temperature. The higher the temperature, the stronger the ability of weeds to absorb and transport agents. At the same time, the chemical activity of the agent is also high, and the amount of the herbicide can be appropriately reduced.
4. Determine the amount of herbicide according to the strength of sunshine. When sunshine is enhanced, the photosynthesis of the plants is strong, and the assimilation products are increased. It is beneficial to the absorption and transport of the medicaments, which can enhance the efficacy and reduce the amount of herbicides.
5. Determine the amount of herbicide according to the cultivation environment. In the mulch, arch shed or greenhouse, the chemical activity of the herbicide is easily increased due to the increase in temperature and humidity, so the amount of the herbicide can be appropriately reduced.
Huaxian Agricultural Technology Center Wu Limin
Chemical weeding in vegetable fields should select suitable herbicides according to the different types of vegetables and the mechanism of action of herbicides. For example, fluridine is a pre-sowing soil treatment agent, which mainly acts on grass weeds and can be used for weeding vegetables such as eggplant, pepper, tomato, cabbage, rape, cabbage, and broccoli.
Second, choose the correct method of application.
The chemical structure and mode of action of herbicides determine the application method is different, some are only applied to soil treatment before sowing, some can be used for pre-emergence treatment, some are only suitable for post-emergence stem and leaf treatment, so choose Use appropriate and effective methods and use them with caution.
Third, choose the appropriate concentration.
The application concentration of the herbicide is related to many factors, such as soil texture, sunshine, humidity, temperature, etc. According to the external comprehensive factors and the instructions for the use of the herbicide, it is reasonable to select the application concentration.
Fourth, determine the amount of medication.
1. Determine the amount of herbicide according to different soil texture and organic matter content. The herbicide efficacy of soil treatment decreased in the order of sand, loam and clay. The content of organic matter was related to the amount of herbicide. When the soil organic matter content was 2.5-5%, it was positively correlated. Therefore, the amount of herbicide should be determined according to the soil texture and organic matter content.
2. Determine the amount of herbicide based on soil water content. When the soil water content is high, the amount of dissolved reagent is large, the leaching property is large, the soil adsorption amount is small, and the drug effect is high; when the soil moisture is large, the air humidity is also large, the leaf pores are easy to open, the drug effect is easy to play, and the medicament can be appropriately reduced. The amount used.
3. Determine the amount of herbicide according to the ambient temperature. The efficacy of most herbicides is positively correlated with temperature. The higher the temperature, the stronger the ability of weeds to absorb and transport agents. At the same time, the chemical activity of the agent is also high, and the amount of the herbicide can be appropriately reduced.
4. Determine the amount of herbicide according to the strength of sunshine. When sunshine is enhanced, the photosynthesis of the plants is strong, and the assimilation products are increased. It is beneficial to the absorption and transport of the medicaments, which can enhance the efficacy and reduce the amount of herbicides.
5. Determine the amount of herbicide according to the cultivation environment. In the mulch, arch shed or greenhouse, the chemical activity of the herbicide is easily increased due to the increase in temperature and humidity, so the amount of the herbicide can be appropriately reduced.
Huaxian Agricultural Technology Center Wu Limin
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