There are many types of herbicide herbicides that are strictly selected, and each herbicide has a certain herbicide spectrum. Some herbicides have very narrow spectrum of herbicides, such as Oatmeal, which can only control wild oats. Methtetrachlorosilane is very effective in controlling sow-herb, purslane, and wild oats, but the effect of controlling piglets is poor. 2,4-D is effective for controlling dicotyledonous weeds such as leeks, but not for grassy weeds. Farmers should use herbicides on the roads according to the most weed species in wheat fields in order to receive ideal results. For control of broad-leaved weeds, weeding nets, diterpenoids, tribenuron-methyl, and 100-a combination agents are effective for weed control; while metsulfuron-methyl, chlorsulfuron-methyl, wheat straw, etc. can only be produced on rice-wheat crops. In the early use of wheat fields, if rice bran is grown on crops such as cotton, corn, peanuts, beans, etc., serious phytotoxicity will occur, resulting in almost accidental accidents. Strict application of the best time Many farmers choose to use wheat herbicides in the spring time, until the weeds of grass age and density is very large when the application of control. At this time, the weeds are old and the drug resistance is enhanced. Therefore, it is necessary to increase the dose when they are controlled. This increases the cost and is also liable to cause phytotoxicity to wheat, postharvest and adjacent crops. For example, if 48% paraquat or 2,4-D is used in wheat during pregnancy, it may result in non-grainy wheat due to too late application time. Years of trials and production practices have shown that the use of herbicides in wheat fields should be better before winter. The time is generally selected before the emergence of wheat herbicides before buds, or wheat 2 to 4 leaf stage can kill herbicides that have emerged. Strictly grasp the temperature and humidity of the application 1. Grasp the temperature when spraying. The temperature at the time of spraying directly affects the effect of herbicides. For example, 2,4-D, dimethyl tetrachlorine, etc. have poor application effects under the temperature of 10° C., and the application effects are better when the temperature is above 10° C.; superstar herbicides are Under low temperature conditions, weeding effects were exhibited 30 to 40 days after application. Therefore, the use of herbicides in wheat fields should be applied at high temperatures on sunny days in order to fully realize the efficacy. 2. Ensure that the soil moisture is adequate when spraying. Whether it is soil application before wheat emergence or application during wheat growth, soil moisture is an important factor affecting the efficacy level. When pre-emergence application, if the surface layer of soil moisture, easy to form a tight layer of pesticide soil, and weed seeds germinate soon, so the control effect is high. When the wheat is applied during the growth period, if the soil is moist, it will be beneficial to the weeds' absorption of the herbicides and their operation in the body, so the medicinal effect is fast and the herbicidal effect is good. Strict control of the amount of weeds and wheat are all plants, and herbicides have limited selectivity. We must ensure that herbicides not only kill weeds, but also do not harm wheat. We must strictly control the amount of herbicides, neither increase them at will, nor decrease them. , must be used in accordance with the dosage described in the user's manual, and be adapted to local conditions. Soil with high organic matter content and fine soil particles has a large amount of herbicides adsorbed thereon, and the amount of soil microorganisms is large and activities are vigorous. The pesticides are degraded more and the application amount should be increased. The sandy loam particles are relatively large, and the adsorption capacity of the pesticide is relatively small. The drug molecules are mostly in the free state among the soil particles, and have strong activity, are prone to phytotoxicity, and the dosage can be appropriately reduced. Herbicides are more stable in alkaline soils, are not easily decomposed, have a long residual effect period, and are prone to produce phytotoxicity to the crops. Therefore, the application time should be as early as possible in alkaline soils and be used with caution. Strictly control the use of herbicide spraying technology, it must be sufficient to dilute the water, fully mixed. To achieve uniform spraying, no heavy spray, no leakage. If adjacent plots are sensitive crops of herbicides, isolation measures should be taken so that when there is wind, no pesticides are sprayed, so as to avoid damage to crops in neighboring plots. It is best to use pesticides for spraying herbicides so as not to injure crops when spraying other pesticides. If the medical equipment does not have special conditions, it must be washed with bleaching powder after spraying herbicides before it can be used to prevent crop pests and diseases. Mixed Vegetable Canned,Canning Mixed Vegetables,Canned Mixed Greens,Vegall Can DOCANNED , https://www.docannedfamily.com