The present study investigated the differentiation of Aphis gossypii in relation to host plants and seasons This analysis, based on field investigation, lineage breeding and microsatellite primer PCR, showed that populations of A gossypii from three overwinter host plant species, Hibiscus Hibiscus syriacus , Pomegranate Punica granatum and Chinese prickly ash Zanthoxylum simulans , were closely related to a pair wise similarity index ranging from 0 833 to 0 917, suggesting a low le...