Second dilution, really important
The second dilution of the pesticide is to first dilute the pesticide preparation into a mother liquid or a mother powder with a small amount of water or a diluted carrier, and then dilute to the desired concentration, which has many advantages over the one-time dispensing. 1. It can ensure that the agent is evenly dispersed in water. For example, wettable powders and powders tend to agglomerate together to form coarse agglomerates. If directly into the solution tank, the coarse agglomerates are not fully dispersed, that is, they sink into the bottom of the water. At this time, it is difficult to stir, which is not conducive to uniform spraying. For example, the suspension of the suspension is prone to deposition during storage, that is, the upper layer gradually becomes thinner and the lower layer becomes thicker. The pharmaceutical solution must be prepared in a two-step process. 2. Conducive to accurate medication. With the development of high-efficiency agriculture in recent years, only a few ten grams (or milliliters) or even a few grams of pesticide per acre is used, and the amount allocated to each sprayer is less. If it is directly sprayed on water, then every barrel (15) Kg) only 2 grams of medication, not easy to weigh accurately in one preparation, but also difficult to dilute evenly. 3. Can reduce the risk of pesticide poisoning. Some of the more toxic pesticides have the opportunity to contact the original drug four times with one dilution method, and the secondary dilution method only needs one time. The possibility of poisoning is greatly reduced. Even if it is exposed to the liquid medicine, it is also a good mother liquor. The probability of poisoning is greatly reduced. It is conservatively estimated that the effect of pesticide products without secondary dilution is 15% to 20% worse than that of pesticides with secondary dilution. For some powders and water-dispersible granules, secondary dilution should be promoted. For the second dilution of pesticides, first use a medical saline bottle or other small container with a capacity scale, place the pesticide in the bottle, inject a proper amount of water into a mother liquor, and apply a heavier viscous agent such as a suspension. The medicine adhered to the small package is washed, gently stirred to completely disperse and dissolve the medicine in the container, and then metered for use in the measuring cup. If a knapsack sprayer is used, it can be directly diluted in the drum. First add a small amount of water to the sprayer, then add a proper amount of liquid, shake well, then make up the water and mix well. If a large-area application is carried out with a motorized sprayer, a larger container, such as a barrel or a cylinder, may be used for primary dilution of the mother liquor. In the second dilution, it can be placed in the sprayer barrel for mixing and mixing. In order to ensure the dilution quality of the liquid, the water consumption of the mother liquor should be carefully calculated and carefully measured. It should not be added or used at will, otherwise it will directly affect the control effect. More pesticide knowledge , please pay attention to China Pesticide Network Aluminum Casting Auto Parts,Aluminum Auto Parts,Aluminum Spare Auto Parts,Heavy Truck Auto Parts NINGBO AIKEHAN METAL PRODUCT CO.,LTD , http://www.diecastingsupplier.com