关键词: 流沙, 灌洞, 灭家鼠

Abstract: Experimental studies on elimination of house rodents by blocking the rat's burrows with quicksand is reported for the first time. The experiments were done inside the country houses in Qingyun and wuoneng counties of Dezhou Prefecture in July and November, 1990 respectively.The metnod was to extend a piece of plastics coated aluminium electric wire into the rats' burrows as deep as possible before pouring dry quicksand into the burrows with a spoon and, when the sand stopped flowing, quiver the wire to facilitate the sand flow. The wire was pulled out after the burrow was full with sand.Observations on 210 sand-blocked Rattus norvigicus burrows for 72 hours revealed very few reexcavated level burrows. No new excavated burrows were found. Calculated from the number of sandblocked burrows, the elimination rate in two studies was 97.70 and 99.16% respevtively. Owing to the drop-out blocking of the burrows and the interference of the new comers, the elimination rate measured with the powder-spot method at the same time was relatively lower, the corrected rate was 76.55 and 85.24% respectively. We believe that in areas where wuicksand is Eavailable, rodent elimination can be obtained by anyone at any time.