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Herbicidal activity of cineole derivatives

Barton, A.F.M., Dell, B. and Knight, A.R. (2010) Herbicidal activity of cineole derivatives. Journal of Agricultural and Food Chemistry, 58 (18). pp. 10147-10155.

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Essential oils and their constituents have potential as ecologically acceptable pesticides that may also have novel modes of action. In this work hydroxy and ester derivatives of the naturally occurring monoterpenoids 1,8-cineole 3, the main component in most eucalyptus oils, and 1,4-cineole 4 were prepared and their pre-emergence herbicidal activity against annual ryegrass (Lolium rigidum) and radish (Raphanus sativus var. Long Scarlet) investigated in laboratory-based bioassays. 1,8-Cineole, eucalyptus oil and all derivatives showed a dose-dependent herbicidal activity against annual ryegrass and radish with many of the derivatives showing improved herbicidal activity relative to 1,8-cineole and high-cineole eucalyptus oil. Increased activity of cineole ester derivatives compared to their associated hydroxy-cineole and carboxylic acid was not observed. No relationship between lipophilicity of the carboxylic acid portion of cineole ester derivatives and herbicidal activity was observed. The results indicate that these cineole derivatives could be environmentally acceptable herbicides.

Item Type: Journal Article
Murdoch Affiliation(s): School of Chemical and Mathematical Science
Sustainable Ecosystems Research Institute
Publisher: American Chemical Society
Copyright: © 2010 American Chemical Society
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