绝大多数的农药。必须加适量的水或其它稀释剂后才能用于防治蔬菜病、虫和草害。农药正确的稀释方法是保证药效、避免药害以及经济用药的一项重要措施。因此,农药稀释时,计量要准确,方法要得当. 农药浓度的表示法很多,常用的有三种:1.百分数浓度:用%表示,即100份药液或药粉中含 Most pesticides. Must add the right amount of water or other diluents before it can be used for control of vegetable diseases, insects and grass damage. The correct method of dilution of pesticides is an important measure to ensure efficacy, avoid injury and economical treatment. Therefore, the dilution of pesticides, the measurement should be accurate, the method should be properly expressed pesticide concentration many, there are three commonly used: 1. Percentage concentration: expressed in%, that is, 100 parts of liquid or powder