Apple and spirea aphids (Homoptera:Aphididae) on apples in south central Washington
Aphids were collected from 75 different apple orchards in south central Washington during 1994 and 1995. In 1994, 88% of those examined were spirea aphid (Aphis spiraecola Patch). In 20 orchards we found only spirea aphids; in 11, most were spirea aphids and in 2, all were apple aphids (A. pomi deGeer). In 1995, 76% of those examined were spirea aphids. In 13 orchards we found only spirea aphids; in 22, most aphids were spirea; in one, all, and in 6 most, were apple aphids. In the two years combined, 33 orchards (44%) had only spirea aphids, 33 (44%) had predominantly spirea aphids, 6 (8%) had mainly apple aphids and 3 (4%) had only apple aphids. There were no clear differences in distribution of the two species over time or on different apple cultivars.
Key words: Aphid; Spirea; apple; orchard
LicenseAuthors 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).