化学除草剂具有省工、省时、除草效果好等优点,近年来,采用化学除草剂的面积逐年扩大,但由于杂草种类繁多,危害程度和危害时期不同,往往因使用不当,不仅达不到理想的除草效果,花费的成本大,甚至药害事故时有发生,造成损失。因此,对除草剂的使用必须掌握正确的使用方法。1、选择 Chemical herbicides have the advantages of saving labor, saving time and good herbicidal effect. In recent years, the area of ​​using chemical herbicides has been expanding year by year. However, due to the large variety of weeds, different degrees of harm and different hazards, chemical herbicides often fail to be used improperly To the ideal weeding effect, the cost of the cost, and even phytosanitary accidents have occurred, resulting in losses. Therefore, the use of herbicides must master the correct method of use. 1, choose