Precautions for application of dryland herbicides
In the production process of agriculture, it is inseparable from the use of pesticides. In addition to the results of weed elimination, we also pay attention to the protection and improvement of farmland environment. The following are six kinds of attentions for the application of herbicides in dry land. matter.
Pay attention to the application period. When the weeds are germinated, they are sensitive to the drug. At this time, the effect of the drug is best. The herbicide used in dry land can generally be used twice. The first time the sowing site is in the pre-emergence seedling, the first time the cultivation field is applied when the weed seeds start to sprout or the young grass just comes out, the second application time is the most suitable. It should be based on the length of the drug and the weeds in the field, usually in the middle of July.
Pay attention to the amount of medication. The amount of medication directly affects the herbicidal effect. Generally, the instructions for use of the drug should be referred to, but the dose should be different depending on the environmental conditions. The same drug applied in the same area will also vary with the external conditions, and it should be controlled flexibly according to the local conditions. When the weeds are tall and the cultivated plants are strong, the dosage can be larger; when the temperature is low, the dosage should be larger; the application of the sand loam should be appropriately reduced to avoid phytotoxicity.
Attention to application methods Weeds in dryland treatment of weeds are both stem and leaf treatment and soil treatment. Stem and leaf treatment is to spray the medicament on the stems and leaves, touch or pass through the leaves to infiltrate the plants to kill the weeds, usually by spraying. The soil treatment allows the medicinal agent to first contact the soil and then kill the weeds. The spray method, the pouring method, and the toxic soil method can be used.
Pay attention to the application environment and safety options. Apply on sunny days, there should be no heavy rain for 12 hours after application. The temperature is low, the soil moisture is too large or too small, and the effect is poor. It is best to do it when there is no wind. When the wind is small, the spray direction should be downwind or beveled with the wind direction. When the leeward sprays, it should be moved backwards. It is strictly forbidden to spray the medicine on nearby crops to prevent phytotoxicity.
Pay attention to reasonable mixing. Most of the herbicides currently on the market are single. The herbicide range of each herbicide is limited, so it is necessary to mix two or more herbicides. The following principles must be mastered when mixing: herbicide combination to eliminate different subjects; quick-acting and slow-acting herbicide combination; endocytic conduction and contact-type combination: long-lasting and short-term combination; large diffusivity in soil A combination of low diffusivity.
Pay attention to the application period. When the weeds are germinated, they are sensitive to the drug. At this time, the effect of the drug is best. The herbicide used in dry land can generally be used twice. The first time the sowing site is in the pre-emergence seedling, the first time the cultivation field is applied when the weed seeds start to sprout or the young grass just comes out, the second application time is the most suitable. It should be based on the length of the drug and the weeds in the field, usually in the middle of July.
Pay attention to the amount of medication. The amount of medication directly affects the herbicidal effect. Generally, the instructions for use of the drug should be referred to, but the dose should be different depending on the environmental conditions. The same drug applied in the same area will also vary with the external conditions, and it should be controlled flexibly according to the local conditions. When the weeds are tall and the cultivated plants are strong, the dosage can be larger; when the temperature is low, the dosage should be larger; the application of the sand loam should be appropriately reduced to avoid phytotoxicity.
Attention to application methods Weeds in dryland treatment of weeds are both stem and leaf treatment and soil treatment. Stem and leaf treatment is to spray the medicament on the stems and leaves, touch or pass through the leaves to infiltrate the plants to kill the weeds, usually by spraying. The soil treatment allows the medicinal agent to first contact the soil and then kill the weeds. The spray method, the pouring method, and the toxic soil method can be used.
Pay attention to the application environment and safety options. Apply on sunny days, there should be no heavy rain for 12 hours after application. The temperature is low, the soil moisture is too large or too small, and the effect is poor. It is best to do it when there is no wind. When the wind is small, the spray direction should be downwind or beveled with the wind direction. When the leeward sprays, it should be moved backwards. It is strictly forbidden to spray the medicine on nearby crops to prevent phytotoxicity.
Pay attention to reasonable mixing. Most of the herbicides currently on the market are single. The herbicide range of each herbicide is limited, so it is necessary to mix two or more herbicides. The following principles must be mastered when mixing: herbicide combination to eliminate different subjects; quick-acting and slow-acting herbicide combination; endocytic conduction and contact-type combination: long-lasting and short-term combination; large diffusivity in soil A combination of low diffusivity.
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