各种农药,如果放置的时间过久,都可能失效,轻者喷后效果降低,达不到预期的目的,重者喷后不但无效,而形成严重的药害,造成不应有的损失。所以对存放时间长的农药或买来无商标的农药要经检验后再施用,以免造成损失。现介绍五种简易检验方法: 1、灼烧法。用于对粉剂农药的检验。取5克左右粉剂,放在金属上,然后在火上灼烧,如果冒出一些白烟,说明没有失效。 2、对水法。用于粉剂。可湿性粉剂和乳剂农药的检验。对粉剂可取50克左右的药剂,放在玻璃瓶里,用肥皂水调成糊状,再加一定的清水,搅动一会 All kinds of pesticides, if placed too long, may fail, the effect of reducing light spray less than expected, the heavy spray is not only invalid, and the formation of serious injury, resulting in undue losses. Therefore, the long-term storage of pesticides or pesticides bought without trademark to be tested before application, so as to avoid loss. Now introduce five simple test methods: 1, burning method. For pesticide powder testing. Take about 5 grams of powder, on the metal, and then burning on the fire, if some white smoke emerge, indicating no failure. 2, on the water law. For powder. WP and emulsion pesticide testing. Desirable about 50 grams of powder on the pharmaceutical, on the glass, with soapy water into a paste, plus a certain amount of water, stirring for a while