近年来,随着玉米田使用化学除草剂的农户不断增加,受人为、气候等因素影响,除草剂药害发生频率也在增加,一般受害轻的地块减产10%,严重地块可减产50%左右,甚至绝产。为了预防和减轻除草剂药害的发生,我们对不同除草剂造成的药害症状及发生原因进行了调查分析,并在实践的基础上,开展了预防补救技术研究。 In recent years, with the increasing use of chemical herbicides in corn fields, the frequency of herbicide damage is also increasing due to man-made, climatic and other factors. The yield of lightly damaged land is reduced by 10% and that of severely damaged land can be reduced by 50% % Or so, or even abortion. In order to prevent and alleviate the occurrence of herbicide damage, we investigated and analyzed the symptoms and causes of phytotoxicity caused by different herbicides and, on the basis of practice, conducted researches on preventive and remedial techniques.