First, according to the crop to be noted that the correct choice and weed herbicides such as tribenuron north Wheat for broadleaf weeds, grass weeds very good effect on wheat safer; but for rapeseed Tin Will kill the crop. Another example grasses g broadleaf crops only on rapeseed, peanuts, soybeans and the like.
Second, the nature of the herbicide to be noted that, during the occurrence of weeds, soil treatment proper administration of drug selected as acetochlor and other crops after sowing, pre-emergence treatment of weeds, improved efficacy; seedling emergence treatment medication should medication before the two leaves of the weeds and crop two leaves. Further, part of Herbicide level is affected by light, temperature, soil moisture, such as glyphosate, like Roundup high efficacy when strong sunlight, it should choose sunny administration; chlorotoluron, dicamba, etc. the difference in herbicidal effect temperature below 5 ℃, should be avoided before and after cold treatment; acetochlor soil moisture at high weeding effect, if the soil drought, rain or irrigation should administration.
Third, we must pay attention to improve the preparation of pharmaceutical preparation and quality of application of wettable powder. When applying water to the water, the pre-weighed agent can be adjusted into a paste with a small amount of water, then poured into the sprayer, and then the amount of water to be added is fully stirred. . If the dosage is particularly small (about 1 gram/mu), the agent should be added with a small amount of water to form a mother liquor, and then put into a sprayer, and then added with water and diluted to the required concentration. Liquid herbicides should first add a certain amount of water to the sprayer, then add the added amount, then inject the amount of water to be added, and stir while adding. The liquid should be prepared with clean water. If glyphosate is added to the turbid water, the agent is adsorbed and passivated by the soil to reduce the efficacy. The water consumption per mu is generally 30-45 kg. When spraying, pay attention to the speed of the hand-pressure sprayer, the speed of walking, and the height of the nozzle should be basically the same, and the width of each spray should be the same, avoiding heavy spray and leakage, and pay attention not to drift to the vicinity when spraying. On other crops. In addition, the soil treatment herbicides, acetochlor, will form a drug layer on the soil surface after application, and should not be cultivated within 1-2 weeks after application. If the application of soil is applied, the dosage of each acre can be mixed with 20-30 kg of moist fine soil. The powder is first mixed with a small amount of fine soil, and then mixed with other fine soil. The liquid is diluted with a small amount of water and sprayed with a sprayer. On a fine soil, it is better to squirt and mix while spraying.
Fourth, we must pay attention to the mixed and alternate use of herbicides. Because of the continuous use of the same herbicide for many years, it is easy to cause sensitive weeds to gradually reduce and produce drug resistance. Therefore, herbicides can only be used in combination for long-term control of grass damage. purpose.
Second, the nature of the herbicide to be noted that, during the occurrence of weeds, soil treatment proper administration of drug selected as acetochlor and other crops after sowing, pre-emergence treatment of weeds, improved efficacy; seedling emergence treatment medication should medication before the two leaves of the weeds and crop two leaves. Further, part of Herbicide level is affected by light, temperature, soil moisture, such as glyphosate, like Roundup high efficacy when strong sunlight, it should choose sunny administration; chlorotoluron, dicamba, etc. the difference in herbicidal effect temperature below 5 ℃, should be avoided before and after cold treatment; acetochlor soil moisture at high weeding effect, if the soil drought, rain or irrigation should administration.
Third, we must pay attention to improve the preparation of pharmaceutical preparation and quality of application of wettable powder. When applying water to the water, the pre-weighed agent can be adjusted into a paste with a small amount of water, then poured into the sprayer, and then the amount of water to be added is fully stirred. . If the dosage is particularly small (about 1 gram/mu), the agent should be added with a small amount of water to form a mother liquor, and then put into a sprayer, and then added with water and diluted to the required concentration. Liquid herbicides should first add a certain amount of water to the sprayer, then add the added amount, then inject the amount of water to be added, and stir while adding. The liquid should be prepared with clean water. If glyphosate is added to the turbid water, the agent is adsorbed and passivated by the soil to reduce the efficacy. The water consumption per mu is generally 30-45 kg. When spraying, pay attention to the speed of the hand-pressure sprayer, the speed of walking, and the height of the nozzle should be basically the same, and the width of each spray should be the same, avoiding heavy spray and leakage, and pay attention not to drift to the vicinity when spraying. On other crops. In addition, the soil treatment herbicides, acetochlor, will form a drug layer on the soil surface after application, and should not be cultivated within 1-2 weeks after application. If the application of soil is applied, the dosage of each acre can be mixed with 20-30 kg of moist fine soil. The powder is first mixed with a small amount of fine soil, and then mixed with other fine soil. The liquid is diluted with a small amount of water and sprayed with a sprayer. On a fine soil, it is better to squirt and mix while spraying.
Fourth, we must pay attention to the mixed and alternate use of herbicides. Because of the continuous use of the same herbicide for many years, it is easy to cause sensitive weeds to gradually reduce and produce drug resistance. Therefore, herbicides can only be used in combination for long-term control of grass damage. purpose.
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