Herbicidal Potential and Quantification of Suspected Allelochemicals from Four Grass Crop Extracts

• DOI: 10.1111/j.1439-037x.2004.00088.x
• Publication Date: 2004-11-15T17:10:58Z
• Authors: S.‐U. Chon; Y.‐M. Kim
• Keywords: Allelopathy; Echinochloa crus-galli; Avena; Cinnamic acid

Abstract Unknown compounds in crop plants are inhibitory to seed germination and early seedling growth of weed plants. A Petri dish assay showed that barley ( Hordeum vulgare L.), oats Avena sativa rice Oryza L.) wheat Triticum aestivum extracts significantly reduced root alfalfa Medicago barnyard grass Echinochloa crus‐galli , Beauv. var. oryzicola Ohwi.) eclipta Eclipta prostrata L.). As the concentration increased, test were reduced. high‐performance liquid chromatography analysis with nine standard phenolic concentrations compositions allelopathic depend on extracted plant extracts. Caffeic acid, hydro‐cinnamic ferulic m ‐coumaric p acid coumarin present all species, detected as highest amount. Coumarin at 10 −3 inhibited more than eclipta. The research suggests barley, oats, have an effect alfalfa, findings bioassay considerably correlated type amount causative allelochemicals, indicating effects three ranked order (highest), (lowest). results may value enabling control based natural or residues fields.