某种农药在某种作物上对某些防治对象使用后的效果最佳,且对作物及环境安全的浓度和用量为有效用量,是农药检测部门和植保工作者验证过的。有效用量分为有效低用量、常规用量和最高用量。一般来说,只要方法得当,时间适宜,在蔬菜上使用有效低用量或常规用量(商标上注明的用量)就 A certain kind of pesticide has the best effect on some kinds of crops after being used by some control objects, and the concentration and amount of the crops and the environment are effective, which is verified by the pesticide testing department and plant protection workers. The effective amount is divided into effective low dosage, conventional dosage and maximum dosage. In general, as long as the method is appropriate, the time is right, the use of vegetables in the effective low dosage or conventional dosage (marked on the amount of trademark)