author(s)
Huma Shereen, Khadija Javed, Humayun Javed, Muhammad Rehan Aslam, Tayyib Ahmad, Kashif Hussain and Ajmal Khan Kassi

abstract
The present study was conducted to investigate the population distribution pattern of aphids and their natural enemies under the response of different wheat varieties at Research Farm of PMAS Arid Agriculture University, Rawalpindi during 2008. Data regarding to winged, wingless and nymph aphid population present on leaves, spike and stem of wheat varieties were recorded. The population of winged, wingless and nymph of aphids were maximum on INQALAB-91 variety with 3.00, 6.69 and 7.97 per leaf and minimum on GA-2000 variety with 2.667, 6.282 and 7.333 per leaf. The predators Coccinelid Beetle, Syrphid fly and Aphid Mummies abundance were maximum on INQALAB-91 variety with 2.154, 1.154 and 3.692. The winged, wingless and nymph aphids population on spikes of wheat were recorded minimum on GA-2000 variety and abundance of predators were maximum on INQALAB-91 variety. The winged, wingless and nymph aphids minimum population were observed on stem of wheat variety GA-2000 with 1.385, 7.564 and 7.436 per stem respectively. The predator aphid mummies were recorded maximum on INQALAB-91 variety with 3.282 while minimum were observed on GA-2000 variety with 2.615. It was also evident from these findings that Ga-2000 proved the comparatively resistant variety with minimum aphids population.