平房仓惰性粉横向环流杀虫效果研究

Research on inert dust transverse circulation technology in warehouse

为优化横向通风系统下惰性粉的施粉工艺,研究了在18 m跨度的早籼稻平房仓中,运用比较预埋于粮堆内不同部位试虫笼中试虫死亡率的方法,初步判断环流方式施粉后惰性粉气溶胶的分布均匀性和防虫效果。结果表明:横向环流可以使惰性粉气溶胶贯穿粮堆,在粮堆内的分布比较均匀,施粉结束15天后玉米象、谷蠹、赤拟谷盗以及长角扁谷盗的校正死亡率分别为27.0%、37.8%、4.6%、54.2%。

In order to optimize the application technology of inert dust with transverse ventilation system, we compare the mortality rates of insects pre - buried in grain stack in different parts of the warehouse with 18m span, and judge the uniformity of distribution of inert dust and the effect of pests control after applying the inert dust by transverse circulation technology. The results show that the transverse circula- tion can make the inert dust aerosol run through the grain stack, and the distribution of the particles in the grain is relatively uniform ; the corrected mortality rates of Sitophilus zeamais, Rhizopertha domirtica, Tribolium castaneum（Herbst） and Cryptolestes pusillus （Oliver） are 27% ,37.8% ,4.6% and 54.2% re- spectively 15 days later.