Study on the Resistance of Commensal Rodents to Anticoagulant Rodenticide in Qingyuan,Guangdong

Objective To study the resistant development of anticoagulant rodenticide in commensal rodents. Methods Unselective feeding method was used,which was established by Rodenticideresistance Monitoring Cooperation Group in China in 1985. Results The rodents (155 Rattus norvegicus, 13 Rattus flavipectus and 28 Mus musculus) caught in Qingyuan and it's three county city zone of Guangzhou province were tested. The resistance rate differs from 0.65%?0 to 50.00% for Rattus norvegicus,Rattus flavipectus and Mus musculus with average taken dosages 9.82, 84.92 to 453.70 mg/kg respectively. The result shows that Mus musculus have developed resistance to anticoagulant rodenticide Ⅰ and Rattus norvegicus has individual resistance. Conclusion The resistance rodenticide Ⅱ should be used in the areas Mus musculus more than others. The anticoagulant rodenticide Ⅰ can be still used but should be used scientifically and properly with careful tests of sensitivity.