保护蛇类减少鼠害何世仁近年来因各种原因，造成一些地方鼠害猖獗。据四川省达川地区两市五县去年综合调查和监测结果：农田鼠密度由１９８９年的４．１７％上升到１９．６％．超标３．９％；农舍高达２２．１％，超标７．７倍。农作物受害率２４．７９％，造成死苗缺窝率... Protection of snakes reduce rat poison He Shiren in recent years due to various reasons, resulting in rampant rodent infestation in some places. According to the comprehensive survey and monitoring results of five counties in Dachuan and Sichuan provinces last year, the density of farmland rats rose from 4.17% in 1989 to 19.6%. Exceeding 3.9%; farmhouse up to 22.1%, exceeding 7.7 times. Crop damage rate of 24.79%, resulting in dead seedlings missing nest rate ...