Strains of cotton aphid and the green peach aphid were collected from cotton producing faints in eastern Australia. Green peach aphid was rarely collected but resistance to Curacron and Pirimor was documented. The abundance of cotton aphid populations showing Primer resistance appears be increasing, however, in contrast the abundance of Curacron may have reduced during 2001 I 2002. Talstar resistance was detected although the product is not registered for aphid control. Endosulfan, Confidor and Pegasus resistance was not detected. The results underpin the resistance management strategy for aphids in Australian cotton and are discussed in conjunction with management recommendations based on IPM principles.