Resistance of Myzus persicae(Sulzer) to insecticides in the major tobacco-planting areas of Fujian Province

The resisitance of Myzus persicae(Sulzer) populations,collected from Sanming,Nanping and Longyan tobacco-planting areas in Fujian,to 6 often used insecticides were determined with dipping method recommended by FAO.The resistance ratios of the M.persicae from the 3 different localities were11.68,5.60,and 3.69 respectively to methomyl,2.08,6.04,and 4.21,respectively to phoxim,2.72,2.70,and 5.89,respectively to imidacloprid,1.20,15.21,and 2.02,respectively to fenvalerate, 1.74,14.87,and 1.19,respectively to cyhalothrin,and 35.03,4.57,and 9.26,respectively to acetamiprid.