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在病虫害发生期,要根据计划的农药浓度和数量,计算出用药量。可按倍比法(不用考虑有效成分含量)计算。如配制500倍液硫酸铜50公斤浸小麦种子,求硫酸铜的用量?根据公式:原药剂用量=新配
In the pest and disease period, according to the planned concentration and number of pesticides to calculate the dosage. According to the ratio method (regardless of the active ingredient content) calculation. Such as the preparation of 500 times the liquid copper sulfate 50 kg soaked wheat seeds, the amount of copper sulfate? According to the formula: the amount of the original dosage = new