难治杂草难防治是因为种植者过分依赖除草剂,不懂农艺措施、喷洒技术不够精准以及没有充分了解除草剂作用原理,错误地认为多加水多加药效果就一定好,然而事实并非如此,错误的用药观念有时会导致药效差,药害严重。杂草需要控制危害,而不是全部杀死,这就需要有效的农艺措施、标准的植保机械及其规范的使用技术,除草剂及其规范的使用技术,合理混配除草 Difficult to control weeds is difficult because weeding growers rely too much on herbicides, agronomic practices do not know, spraying technology is not precise enough and did not fully understand the role of herbicides, mistakenly think that more water plus the drug effect is certain, but this is not the case , The wrong concept of medication sometimes lead to poor efficacy, serious injury. Weeds need to control hazards, not all killed, which requires effective agronomic measures, standard plant protection machinery and its use of norms of technology, herbicides and their use of norms, reasonable mix and weed