在防治农作物病虫草害中,常常因随意增加农药使用量、使用时期不正确、喷布不均匀、施药后遇低温寒流、劣质药剂等因素,造成植株叶片出现黄褐色枯斑、叶尖叶缘失绿、卷叶、生长停滞、畸形穗、畸形果,甚至整株枯萎等药害症状。如2.4-D在小麦上使用,极易造成药害,导致麦穗畸形、缺粒而减 In the prevention and treatment of crop pests and diseases, often due to arbitrary increase in the amount of pesticides, the use of time is not correct, uneven spraying, spraying low temperature cold, poor quality pharmaceutical agents and other factors, resulting in plant leaves appear brownish yellow spots, leaf tips Marginal lost green, curly leaves, growth stagnation, deformity spike, deformity fruit, and even the whole plant withered and other symptoms of injury. If 2.4-D is used on wheat, it is very easy to cause phytotoxicity, leading to malformation of wheat and lack of grain