农药是农业植保的一种重要手段,在许多人的概念中似乎农药就是杀虫剂。其实农药的含义是很广的,按用途粗分,它包括杀虫剂、杀菌剂和除草剂三大类。由于虫害面积大,张目显眼,易引起人们的重视,可是对于病害,因为它不易觉察,相当多的人是忽略,马虎了事。然而一旦病害发生,就往 Pesticides are an important means of agricultural plant protection and pesticides appear to be pesticides in many people’s concepts. In fact, the meaning of pesticides is very broad, according to the use of rough points, which includes pesticides, fungicides and herbicides three categories. Due to the pest area is large, visible, easy to arouse people’s attention, but for disease, because it is not easy to detect, a considerable number of people are ignored, careless. However, once the disease occurs, go