Wettable powder pesticides usually adopt a two-step preparation method, that is, use a small amount of water to prepare a relatively concentrated mother liquor, and then pour it into a syrup bucket for dilution. Because if the quality of WP is not good, the granules will tend to agglomerate to form larger granules. If the granules are directly poured into the medicine bucket, the coarse granules will not be fully dispersed and they will immediately sink to the bottom of the water. At this time, stirring will be more appropriate. difficult. It is important to note that the two-step preparation method requires that the amount of water used twice be equal to the total amount of water needed, otherwise it will affect the concentration of the liquid to be prepared.
Liquid pesticides, depending on the amount of drug dilution and drug activity determine how to dilute. A small amount can be directly diluted, that is, in the preparation of a good container to hold the required water, and then slowly poured into the water quantitative agent and stir, you can spray use. If the amount is large, two-step preparation method is required. The specific method is: first dilute the pesticide with a small amount of water into the mother liquor, and then pour the prepared mother liquor into the prepared fresh water according to the dilution ratio, and mix well. .
Granules pesticides, the active ingredient content is usually low, mostly around 5%, so need to be diluted with fillers. The dry uniform small soil particles or same-sex chemical fertilizers can be used as the filler, and the granules and the filler can be fully mixed when diluted. However, when using chemical fertilizers as fillers, it must be noted that the acidity and alkalinity of pesticides and fertilizers must be the same, so as to avoid the decomposition of pesticides caused by mixing and rendering them ineffective.
The method for calculating the dilution of common pesticides (calculated by adding 15 kg of water to each sprayer) is as follows: 500 times of liquid, 30 ml or 30 g of pesticide is added; 600 times of liquid, 25 ml or 25 g of pesticide is added; 800 times of liquid is added. 19ml or 19g of pesticide; 1000ml of pesticide added 15ml or 15g; 1200x added pesticide 13ml or 13g; 1500x added pesticide 10ml or 10g; 2000x added pesticide 7.5ml Or 7.5 grams; 2500 times the added pesticide 6 ml or 6 grams; 3000 times the liquid, add pesticide 5 ml or 5 grams; 5000 times the liquid, add pesticide 3 ml or 3 grams.
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