防护剂马拉硫磷在国外储粮仓库中广泛应用已二十余年,实践证明它具有药效长、残毒低、使用安全、价格低廉、应用面广等特点,防治效果良好,是国外储粮害虫化学防治领域内的一类重要药剂。我省六十年代初期曾采用马拉硫磷防治储粮害虫,并取得一定的效果。但由于当时生产的马拉硫磷纯度较低,药剂中杂质多,对人畜有毒,因而以后未继续在储粮 Protective agent malathion in foreign grain storage warehouse has been widely used for more than 20 years, proved it has long drug efficacy, low residue, safe, low cost, wide range of applications and other characteristics of good control effect, is the foreign storage An important class of pharmaceuticals in the field of chemical control of pests. In the early 1960s, the province used malathion to control stored grain pests and achieved certain results. However, due to the low purity of malathion produced at that time, the impurities in the medicaments were more toxic to humans and animals,