2010～2011年对吉林省蛟河市水稻、玉米和大豆等主要作物地的害鼠群落进行了广泛调查,并统计相应的危害损失情况。结果显示,当地农田害鼠的绝对优势种类为黑线姬鼠。捕获的其他种类害鼠还有褐家鼠、小家鼠、大仓鼠和鼩鼱。2010年鼠密度较高,总体捕获率达6.0%(黑线姬鼠为4.25%),作物损失率较高,其中大豆产量损失达2.8%。2011年鼠密度较低,为3.68%(黑线姬鼠为3.07%),作物损失率均在0.5%以下,因此可以基本判定,鼠密度在3%以下时,不需进行大面积灭鼠。 From 2010 to 2011, extensive investigation was carried out on the pest community in the main crops such as rice, corn and soybean in Jiaohe City, Jilin Province, and the corresponding damage losses were calculated. The results showed that the absolute predominant species of local farm pests were Apodemus agrarius. Other species of harmed creatures caught include Rattus norvegicus, Mus musculus, hamster and catfish. The rat density was higher in 2010, with an overall capture rate of 6.0% (4.25% for Apodemus agrarius), with a higher crop loss rate, with soybean yield losses of 2.8%. The rat density in 2011 was low at 3.68% (3.07% for Apodemus agrarius) and the crop loss rates were all below 0.5%. Therefore, it can be basically determined that a large area rat extermination is not required when the rat density is below 3%.