NATURAL SELECTION AND MATERNAL EFFECTS IN LIFE HISTORY TRAITS OF BREVICORYNE BRASSICAE (HOMOPTERA: APHIDIDAE) ON TWO SYMPATRIC CLOSELY RELATED HOSTS.

The article focuses on the study that estimates the mode and magnitude of selection on life history traits of Brevicoryne brassicae (homoptera) on two sympatric host plants known as brassica campestris and Brassica oleraceae. The study notes that the vital effect together with the recipient host was detected for most life history traits. It mentions the factors that prevents the evolution of host plant specialization, despite the suggesting incipient ecological specialization in B. brassicae.