一些年来,同薰蒸剂一样马拉硫磷用于触杀谷物害虫.此种杀虫剂对害虫来说比薰蒸杀虫剂的效力大,因为它对害虫有较长时间的毒杀作用(在某种情况可达一年).实践证明,谷物温度和含水量越低,药剂的毒杀效力就越大.因此,用马拉硫磷来喷雾谷物时,最适宜于低水分粮以及平均粮温不超过20℃,根据消耗的剂量标准分类如表一所示. For several years malathion, like fumigants, has been used to kill grain pests that are more potent to pests than fumigants because they have a long-lasting toxic effect on pests ( In some cases up to one year.) The lower the temperature and water content of the cereal, the greater the toxicological potency of the agent, so spraying malathion on cereals is best suited for low-moisture diets and on average Food temperature does not exceed 20 ℃, according to the consumption of the standard dose classification as shown in Table.