Life-cycle of a spiral gall aphid, <i>Pemphigus spirothecae</i> (Homoptera: Aphididae), on poplar in British Columbia
Keywords:
poplar, spiral gall aphid, <i>Pemphigus spirothecae</i>, Homoptera, , AphididaeAbstract
<i>Pemphigus spirothecae</i> Pass. was inadvertently introduced into North America only recently. Upon hatching in spring on lombardy poplar, the fundatrix feeds on a leaf petiole, which bends and then spirals into a spiral gall. The fundatrix produces about 100 fundatrigeniae within the gall. These produce winged sexuparae which leave the gall and settle on the poplar bark, where they produce up to eight progeny, males and females. Each female lays a single large egg which overwinters on the bark. This aphid is thus monoecious and holocyclic.References
llenye, E.H. and F.O. Morrison. 1974. Pemphigus spirothecae (Homoptera: Aphidoidea), an aphid which causes spiral galls on poplar in Quebec. Canad. Ent. 106(11):1229-1231.
Dunn, J.A. 1960. The formation of galls by some species of Pemphigus (Homoptera-Aphididae). Marcellia 30 (Suppl.):155-167.
Forbes, A.R. 1969. The stylets of the green peach aphid, Myzus persicae (Homoptera: Aphididae). Canad. Ent. 101(1):31-41.
Forrest, J.M.S. 1971. The growth of Aphis fabae as an indicator of the nutritional advantage of galling to the apple aphid Dysaphis deveeta. Ent. Exp. & Appl. 14(4):477-483.
Gerhardt, K. 1922. Uber die Entwicklung der Spirallockengalle von Penphigus spirothecae ander Pyramidenpappel. Z. Pflkrankh. 32: 177-189. (Seen in Rev. Appl. Ent. A10:492 (1922)).
Mani, M.S. 1964. Ecology of plant galls. Monogr. Biol. 12. Junk (The Hague).
Miles, P. W. 1968. Insect secretions in plants. Ann. Rev. Phytopathol. 6:137-164.
Toth, L. 1939. Uber die Biologie der Blattlaus Pemphigus spriothecae Pass. Z. angew. Ent. 26(2):291-311.
Downloads
Published
Issue
Section
License
Authors who publish with the Journal of the Entomological Society of British Columbia agree to the following terms:
-Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
-Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
-Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
