Journal of Chemical Ecology

, Volume 12, Issue 6, pp 1205–1211 | Cite as

Allelopathic polyacetylenes fromCentaurea repens (Russian knapweed)

  • Kenneth L. Stevens


The allelopathic weed Russian knapweed (Centaurea repens) was found to contain polyacetylenes VIII–XIV in the roots. Dose vs. response of the root length elongation against lettuce, alfalfa, barnyard grass, and red millet showed IX to be active. Closely related isomers were not active. Examination of the soil surrounding the Russian knapweed roots revealed the presence of IX in sufficient concentration to have an appreciable effect on the surrounding plant community.

Key Words

Allelopathy polyacetylenes Russian knapweed Centaurea repens Compositae 


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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Kenneth L. Stevens
    • 1
  1. 1.U.S. Department of AgricultureWestern Regional Research CenterBerkeley

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