石硫合剂是果树生产中的特效药,即使是在各种新农药竞相问世的今天,从事果树栽培的人们,也仍然没有忘掉石硫合剂这位农药中的“有功之臣”。它不论杀虫杀菌,效果均佳,且制备简单,原料易得,成本低廉,残毒低。至今依旧是果园中广泛应用的良药。那么,石硫合剂为什么能杀虫、杀菌呢?大家知道,石硫合剂是用石灰,硫磺和水混合熬制而成的,其主要成分是一种叫做多硫化钙的化合物,其次还有硫代硫酸钙及少量亚硫酸钙和硫酸钙等。石硫合剂喷洒到果树上以后,多硫化钙逐渐发生氧化、碳酸化及水解反应,产生一种叫做硫化氢的物质及许多硫磺微粒.硫化氢是一种毒性很大的气体,能渗进虫体或菌体内,引致死亡;硫磺微粒可挥发 Limestone is a special medicine used in the production of fruit trees. Even in the race of new pesticides, people engaged in fruit tree cultivation still have not forgotten the “active officials” of the pesticide. It is insecticidal and bactericidal with good effect and simple preparation. The raw materials are easy to obtain, the cost is low and the residue is low. It is still a widely used medicine in orchards. So, why the lime sulfur insecticide, sterilization? As you know, lime sulfur mixture is made of lime, sulfur and water mixture, the main component is a compound called calcium polysulfide, followed by sulfur On behalf of calcium sulfate and a small amount of calcium sulfite and calcium sulfate. After the lime-sulfur mixture is sprayed on the fruit trees, the calcium polysulfide gradually undergoes oxidation, carbonation and hydrolysis to produce a substance called hydrogen sulfide and many sulfur particles. Hydrogen sulfide is a highly toxic gas that can infiltrate insects Body or bacteria, causing death; sulfur particles can be volatile