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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 aphid is the primary host of Aspen. Part of its life cycle takes part on an alternate host . This describes its biological history . Includes 8 B+W and color photos.