Skip to main content

Notes: Aphids Feeding on Mycorrhizae of Douglas-Fir

Buy Article:

$29.50 plus tax (Refund Policy)


Aphids, probably Pemphigus piceae Htg., were observed feeding directly on mycorrhizae of second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in western Oregon. Infestations were heaviest on mycorrhizae growing within fallen, decaying trunks of Douglas-fir. A similar aphid was also found feeding on mycorrhizae of seedling Tsuga heterophylla (Raf.) Sarg. and Picea sitchensis (Bong.) Carr. Attack varied according to type of mycorrhiza, suggesting that some fungal symbionts may secrete an attractant, others a repellent. In contrast, a second aphid, Prociphilus americanus Wlk., was observed feeding on suberized roots, but not mycorrhizae, of Abies procera Rehd.

Document Type: News

Affiliations: Staff of the Pacific Northwest Forest and Range Expt. Sta., Forest Service, U.S. Dept. Agric., Portland, Ore.

Publication date: December 1, 1965

More about this publication?
  • Membership Information
  • ingentaconnect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more