First, the dilution method. Percentage concentration refers to the number of parts containing medicine and fertilizer in 100 medicinal fertilizers or medicinal fertilizers, and is expressed in “%â€. For example, 2% urea means that there are 2 kg urea and 98 kg water in a 100 kg urea solution.
Second, multiple concentrations. Refers to the number of times the water is added to the pesticide and is usually expressed in terms of weight. For example, the preparation of 700 times 50% carbendazim is done with 1 part of 50% carbendazim and 700 parts water.
Third, the water method. When several pesticides are used in combination, not every application of one kind of medicine adds water. Instead, each kind of medicine uses the same amount of water to calculate the concentration. For example: 500 times the urea plus 1000 times the thiophanate methyl, is 2 parts of urea plus 1 part thiophanate methyl water plus 1000 parts. In addition, when the water, it should be dubbed the mother liquor, that is, first with a small amount of warm water to the liquid liquefaction, and then add water to the required concentration, fully dissolved, in order to improve efficacy and prevent phytotoxicity.
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