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Volatile Monoterpenes as Potential Parent Structures for New Herbicides

Published online by Cambridge University Press:  12 June 2017

Steven F. Vaughn  and
Gayland F. Spencer
Steven F. Vaughn
Affiliation:
Bioactive Constituents Res., Nat. Ctr. for Agric. Utilization Res., 1815 N. University St., Peoria, IL 61604
Gayland F. Spencer
Affiliation:
Bioactive Constituents Res., Nat. Ctr. for Agric. Utilization Res., 1815 N. University St., Peoria, IL 61604
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Abstract

Eighteen volatile monoterpenes, which are among the major constituents of essential oils from plants, were screened for phytotoxicity to several crop and weed species. Several monoterpenes containing an oxygen function severely inhibited germination of four different annual weeds while concurrently displaying little effect on soybean germination. Soybeans varied in their sensitivity to various monoterpenes (measured by seedling growth), with α-terpineol and geraniol selectivity inhibiting weed seed germination while having little or no effect on soybeans. All of the monoterpenes tested exhibited relatively high germination and growth inhibition to corn and wheat.

Keywords

Cinmethylin, exo-1-methyl-4-(1-methylethyl)-2-[(2-methylphenyl)methoxy]-7-oxabicyclo [2.2.1] heptaneItalian ryegrass, Lolium multiflorum Lam. #3 LOLMUlarge crabgrass, Digitaria sanguinalis (L.) Scop. #DIGSAredroot pigweed, Amaranthus retroflexus L. #AMAREvelvetleaf, Abutilon theophrasti Medik. #ABUTHalfalfa, Medicago sativa (L.) ‘Vernal’corn, Zea mays (L.) ‘Pioneer 3377’cucumber, Cucumis sativus (L.) ‘Edmonson’soybeans, Glycine max (L.) Merr. ‘Williams 82’wheat, Triticum aestivum (L.) ‘Coker 68–19’Allelochemicalsgerminationgrowth inhibition
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 41 , Issue 1 , March 1993 , pp. 114 - 119
Copyright
Copyright © 1993 by the Weed Science Society of America 

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