惰性粉气溶胶横向环流与直排施粉防虫效果比较研究

COMPARATIVE STUDIES OF PEST CONTROL OF FOOD-GRADE INERT DUST BY TRANSVERSE CIRCULATION AND DIRECT EXHAUST

通过施粉后粮库内采样,实验室培养,检查试虫死亡率的方法,对比了平房仓内横向通风系统下,利用环流与直排两种惰性粉气溶胶施粉方式的防虫效果。结果表明:两种方式都能使惰性粉气溶胶贯穿粮堆,形成最低致死浓度,对长角扁谷盗、玉米象、谷蠹和赤拟谷盗均能起到一定的防治效果,环流施粉好于直排施粉,在惰性粉分布的均匀性上,两者均没有表现出明显的优势。

In order to clarify the effect of pest control of food--grade inert dust by the ways of transverse circula- tion and direct exhaust in horizontal warehouse, we collect samples, cultivatle in laboratory, check the mor- tality, compared the pests control effects of the two kinds of ways. The results showed that the two meth- ods can make the inert powder aerosol through the grain stack, forming the minimum lethal concentration, getting the certain control effect to Sitophilus zeamais, Rhizopertha dominica, Tribolium castaneum （Herbst）and Cryptole stespusillus （Oliver）. The mortality rates of transverse circulation technology was higher and there was no obvious advantage in the uniformity of the distribution of inert powder between two technologies.