How to formulate pesticides
First, the principle of pesticide use The principle of safety, efficiency, and economy should be used in the formulation of pesticides. Safety, to prevent the poisoning of humans and animals, to avoid crop damage, control pesticide residues, to promote pollution-free pesticides, to protect beneficial organisms. Efficient, effective to control the harmful pests, control effect is good; to use pesticides, choose the right timing drugs, use an effective dose and the correct method of application. Economics, pay attention to economic efficiency, with the lowest cost, get the greatest effect; do drugs for prevention and control, pay attention to the application of pesticide technology, use pesticides with better control effect. Second, the commonly used agent concentration method 1. Percent concentration. That is, 100 parts of the liquid medicine or powder containing the number of pure drugs, with ?. For example, 50% carbendazim WP (50% carbendazim WP), ie 100 carbendazim active ingredient, is 50 parts. 2, multiple method. The amount of water or filler in the liquid or powder is the multiple of the original dose, which is generally calculated by weight. In applications where the dilution factor is low, if one is less than 100, one part of the original drug should be deducted; if the dilution factor is less than 100, one part of the original drug will not be deducted. If the emulsion spray is diluted 40 times, it should be taken 39 parts of water were added to 1 part of the drug; diluted 200 times, 1 part of the drug was added to 200 times water. 3, in parts per million. That is, the number of pure pharmaceuticals contained in 1 million liquid medicines or medicinal powders, commonly used in PPM, is one millionth of a million (grams, liter). Third, the conversion of different concentrations of representation. 1. Percent Concentration and Percent Concentration Conversion: Percent Concentration (PPM) = 10000 Percent Concentration (without %) IV. Dilution and Calculation of Pesticide Concentration 1, multiple dilution calculation method: the weight of the original liquid (powder) = diluted liquid / dilution multiple 2. Calculate the formula for the dilution of the effective ingredient: the weight of the original drug = the weight of the diluted drug solution * the concentration of the diluted drug solution / the concentration of the original drug Smart Nucleic Acid Diagnoostic Cloud Service Nucleic Acid Diagnoostic,Multiplex Quantitative Pcr,Quantitative Pcr Instruments,Real Time Pcr Machine Thermal Cycler Jiangsu Dinai Bioengineering Co.,ltd. , https://www.dinaipcr.com