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一、遇碱性物质分解失效的农药,不能与碱性农药混用。有机磷制剂、氮基甲酸酯类、菊酯类和溴氰菊酯在碱性溶液中很快分解失效。因此,这几类农药不能与碱性农药如波尔多液、石硫合剂、石灰、洗衣粉、氨水、草木灰水混用。 二、混合后易发生反应、引起药害的不能混用。如波尔多液与石硫合剂混合后产生硫化铜沉淀,其溶解后产生过量的铜离子会对作物起毒害作用。所以这两种农药绝对不能混用,并且在喷洒过波尔多液的植物上,一般要隔20—30天,才能再施用石硫
First, the event of decomposition of alkaline pesticides ineffective, not mixed with alkaline pesticides. Organic phosphorus formulations, azidates, pyrethroids and deltamethrin decompose rapidly in alkaline solutions. Therefore, these types of pesticides can not be mixed with alkaline pesticides such as Bordeaux mixture, lime sulfur, lime, washing powder, ammonia, ash water. Second, easy to react after mixing, causing injury can not be mixed. Such as Bordeaux mixture of lime and lime sulfur mixture produced after precipitation of copper sulfide, the copper ions produced after its dissolution will play a poisonous role in crops. Therefore, the two pesticides must not be mixed, and the plants sprayed with Bordeaux mixture, usually every 20-30 days, to re-application of stone sulfur