有关防虫线方面,人们曾先后想出了不少办法。最初是将配好的杀虫溶液直接喷洒在粮仓四周的墙脚和粮仓门口,后因一晒就干,干后害虫照样能顺利地通过这种防线,进入仓内。后来,又在沿仓库四周的墙脚,用水泥筑起一道环仓水沟,并灌注杀虫溶液。后又因渗漏、易干、积污,又难以清理等原因,未经大范围的普及就淘汰了。目前使用最为普遍的方法是将杀虫溶液喷洒在事先铺在仓门前的草帘上,因为草帘可以容纳 Regarding insect control lines, people have come up with many ways. Initially the insecticide solution is sprayed directly onto the wall and granary doors around the granary. After a dry sun, the pests can still pass through this line of defense smoothly and enter the silo. Later, again in the warehouse along the wall around the foot, use cement to build a ring warehouse ditch, and perfusion insecticidal solution. Later because of leakage, easy to dry, pollution, but also difficult to clean and other reasons, without a wide range of out on the elimination. The most common method currently used is to spray the insecticidal solution on a straw curtain that is laid in front of the door, because the straw curtain can accommodate