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研究了在直径30m、高度15m的浅圆仓中储存小麦粮面施用磷化铝片剂后磷化氢的扩散运动情况,并进行了杀虫效果试验。结果表明,在“热皮冷心”状态下,密封性能良好的浅圆仓表面施药后,磷化氢可以比较快且较为均匀地在粮堆中进行扩散分布,在用药量较低(磷化铝片剂3g/m3)的情况下,也可保持较高和较长时间的磷化氢浓度,杀死具有一定抗性的害虫。
The diffusion of phosphine was studied after aluminum phosphide tablets were stored in shallow silos of 30m in diameter and 15m in height, and the insecticidal effect was tested. The results showed that under the condition of “hot skin and cold heart”, the surface of shallow silo with good sealing performance could distribute phosphine faster and more uniformly in the grain piles. When the dosage was lower (phosphorus Aluminum 3g / m3), it is also possible to maintain the concentration of phosphine at higher and longer time to kill insects with certain resistance.