一前言番禺县地处珠江三角洲,气候温暖.潮湿.土地肥沃,是广州市重点产粮基地,每年粮食征购任务13.9万吨,由于储粮堆高多达4—5米,用常规熏蒸方法,毒气不易渗透粮堆底部,严重影响熏蒸杀虫效果。为此,我们学习国外环流熏蒸杀虫经验,在消化吸收的基础上,结合我县仓储条件情况.进行不断的试验研究改革创新.终于1989年初研制了 Panyu County is located in the Pearl River Delta, a warm climate. Humid. Fertile land, is the key grain-producing base in Guangzhou, the annual grain procurement mandate of 139,000 tons, as storage grain heap up to 4-5 meters, with conventional fumigation methods, Gas is not easy to penetrate the bottom of the grain heap, seriously affecting the fumigation insecticidal effect. To this end, we learn from foreign circulation fumigation insecticide experience, on the basis of digestion and absorption, combined with the conditions of our county warehousing conditions. Undertaking experimental reform and innovation. Finally developed in early 1989