Rodent not only cause damages on crops and also hazard to health of people in agroecosystem. But on the other hand ,rodent including those pest species play an important role in ecosystem. The basic reason for rodent to become pests is land use as farm in field ecosystem, which has significant impacts on species diversity. And agricultural activities also play an important rule on rodent population, such as intercropping, rotation, tillage, irrigation, weeding, and replace of agrotype or crop species. Rodenticide use in unreasonable and extensive way results in loss of nontarget natural enemy....
