作物药害及预防措施一、作物产生药害的表现药害是指因施用农药不当，使作物产生各种病态的反应，可分为急性和慢性两种。１、急性药害：在喷药后２—５天即可出现症状，有的甚至几个小时即产生药害，叫急性药害。叶部有斑点、穿孔、焦的、失绿、落叶等症状表现，果实上可... Crop phytotoxicity and preventive measures A, the performance of crop phytotoxicity refers to the improper application of pesticides, the crop produces a variety of pathological reactions can be divided into two kinds of acute and chronic. 1, acute injury: 2-5 days after the spray can be symptoms, and sometimes even a few hours that produce injury, called acute injury. Leaf Ministry has spots, perforation, coke, loss of green, deciduous and other symptoms, the fruit can be ...