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一、成品农药用水稀释的计算方法 1.稀释时需加水的量=(成品农药的浓度/所需使用的浓度-1)×成品农药的量。例如:用40％乐果乳油0.3斤稀释成0.04％浓度防治蚜虫,问稀释时应加多少水? 代入上式:稀释时需加水的量= 2. 应加成品农药的量=所需使用的浓度×所需药液量/成品农药的浓度例如:某一农药的有效含量为50％,需配成200PPM浓度药液2500毫升,问须加含量为50％的农药多少? 代入上式:应加成品农药的量=200/1000000×250/(50/100)=2/1×250×(10/50)=50/50=1(克)=1(毫升),[1PPM=百万分之一] 3.加水倍数=成品农药的浓度/使用浓度例如:将50％的1059稀释成0.02％浓度防治蚜虫,应加多少水? 代入上式:加水倍数=50/0.02=2500(倍)
First, the finished product diluted with pesticides water calculation method 1. Dilution of the amount of water to be added = (concentration of finished pesticides / required concentration -1) × amount of finished pesticides. For example: 40% dimethoate 0.3 kg diluted to a 0.04% concentration of aphids control, and asked how much water should be added diluted? Substitution into the above formula: the amount of water to be diluted = 2. The amount of pesticides should be added = required Concentration × required liquid volume / finished pesticide concentration For example: the effective content of a pesticide is 50%, need to be dubbed 200PPM concentration 2500ml, asked to add 50% of the amount of pesticide? Amount of additive pesticide = 200/1000000 × 250 / (50/100) = 2/1 × 250 × (10/50) = 50/50 = 1 (g) = 1 One] 3. Water multiples = concentration of finished pesticides / use concentration For example: 50% of 1059 diluted to 0.02% concentration of aphids control, how much water should be added into the type: water multiples = 50 / 0.02 = 2500