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bibliographical review of pachypappa tremulae ( L ) : a root aphid of conifer seedlings in containers
bibliographical review of pachypappa tremulae a root aphid of conifer seedlings in containers - L Author:R. Lavallee This describes the life cycle of this aphid that feeds on Aspen trees . It describes its taxonomic postion , distribution and hosts , morphological description , biological cycle , damage and control. Includes electron microscopic photos along with color photos of the damage .