近些年来,玉米田化学除草剂使用面积不断扩大,因种类繁多,使用技术要求严格,同时也因人为及天气等因素的影响,除草剂药害发生次数及面积也有逐年增多的趋势,造成玉米减产甚至绝收。针对药害发生的原因,应认真找出规范的用药方法,并在出现药害后及时进行补救。从笔者近些年的调查分析,玉米田发生药害的原因主要有以下几点:1.施药时期不当。玉米田 In recent years, cornfield chemical herbicide use area continues to expand, due to a wide range of technical requirements are strict, but also due to man-made and the weather and other factors, the number and area of ​​herbicide phytotoxicity also increased year by year trend, resulting in corn Cut even absolutely. For the reasons for the occurrence of injury, should carefully identify the standard method of medication, and timely remedial drug injury occurs. From the author’s investigation and analysis in recent years, the main causes of injury occurred in corn fields are the following: 1. Improper spraying time. Cornfield