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在中央储备粮乳山和文登两直属库进行了高大平房仓磷化氢熏蒸实仓试验研究。对实验仓进行了密封处理 ,经测试实验仓压力由 50 0Pa降至 2 50Pa的时间都在 4 0秒以上。共设 3种磷化氢熏蒸方法 :磷化氢钢瓶气 ( 2 98)、磷化氢仓外发生器和磷化铝片粮面施药法。借助环流熏蒸装置进行了熏蒸杀虫试验 ,磷化铝用药量为 1g/ ,钢瓶气和磷化氢仓外发生器分两次施药。试验结果表明施药后环流 3天可使仓内磷化氢基本分布均匀 (最高和最低浓度比小于 4 ) ,磷化氢浓度绝大部分时间都在 2 0 0 ppm以上 ,密封 14天的CT值绝大部分测试点都在 150mg .h/L左右。粮堆内原有的害虫和试验前预埋的敏感和抗性害虫以及各种虫态害虫 (成虫、卵、幼虫和蛹 )均被杀死。研究表明在高大平房仓内 ,借助环流装置用磷化铝粮面施药法能很好地杀死害虫 ,是一种经济实用的害虫防治方法
In the central reserve grain Rushan and Wendeng two libraries have been carried out a large silo warehouse phosphine fumigation real-time experimental study. The test chamber was sealed, the test chamber pressure dropped from 50 0Pa 2 50Pa time in more than 40 seconds. A total of three kinds of phosphine fumigation methods: phosphine gas cylinder (2 98), phosphine outside the generator and aluminum phosphide food surface method. Fumigation insecticide test was carried out by means of circulating fumigation device, dosage of aluminum phosphide was 1g /, cylinder gas and phosphine external generator were applied twice. The results showed that after circulating for 3 days, the distribution of phosphine in the silos was basically uniform (the highest and lowest concentration ratio was less than 4), the concentration of phosphine was above 200 ppm for most of the time, and the CT for 14 days The vast majority of test points are at 150mg .h / L or so. The original pests in the grain piles and pre-embedded sensitive and resistant pests as well as various insect pests (adults, eggs, larvae and pupae) were killed. Studies have shown that it is an economical and practical pest control method to kill pests well in the large bungalow warehouse with the aid of the fluxing device with the aluminum phosphide grain noodles.