Action of Rodents Control on Rodent Community Structure on Farmland

Objective To study the action of chemical control on rodent community structure for rodent forecast and control.Methods The anticoagulate rodenticides were used to control farmland rodents in spring and summer every year,the species,density and biomass of farmland rodents in Guangdong province were investigated with night trapping method from 1987 to 2000. Results After use of anticoagulate rodenticides for a long time, the percentage and biomass of Bandicota indica increased distinctly and those of Rattus rattoides reduced, and brought about changes to the rodent community structure and the index of diversity of farmland rodent community. Conclusion Chemical control resulted in the increase to the density of those rodents with larger size and stronger endurance to the rodenticide.