在作物感染了病或遭虫危害时,需要用许多不同种农药进行防治,但在病虫害得到控制之后常常会剩下部分农药留着以后或下年使用。在目前农药短缺的情况下,剩余农药的科学保管和贮藏,显得更为重要。许多种农药由于保管不善往往变质失效,不仅经济损失,而且用了这种农药不但起不到防治病 Many different types of pesticides need to be used to control crops when they become infected or endangered. However, after the pests and diseases have been controlled, some of the remaining pesticides will often remain after use or the next year. In the current case of pesticide shortage, the remaining scientific preservation and storage of pesticides, even more important. Many kinds of pesticides often spoil due to poor management, not only economic losses, but also with this pesticide not only failed to control the disease