Observations on the biology of Cinara ponderosae (Williams) in the westside forests of the Sierra Nevada.

D. J. Voegtlin, D. L. Dahlsten

Research output: Contribution to journalArticlepeer-review

Abstract

The species is believed to be anholocyclic, because sexuals, eggs and fundatrices were absent. In the spring following winter survival on ponderosa pine Pinus ponderosa in the foothills, populations migrated up the west slope of the Sierra Nevada. The local population in Blodgett Forest, Eldorado County, began in May with the number of aphids and colonies expanding throughout June and collapsing by the end of July. There was a gradual increase in older instars until population collapse. First generation 4th instars and apterae moved throughout the tree and began new colonies. Predators, primary and secondary parasites, and ant associates were noted.- from Authors

Original languageEnglish (US)
JournalHilgardia
Volume50
Issue number3
StatePublished - Jan 1 1982

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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