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Allelopathic effects of Inula viscosa leaf extracts on weeds Dor E.*, Hershenhorn J. Weed Research Department Newe Ya'ar Research Center, Agricultural Research Organization, P. O. Box 1021, Ramat Yishay-30095, Israel *Correspondence author: E.Mail: evgeniad@volcani.agri.gov.il
Online published on 7 November, 2012. Abstract Both leaf extract and dry leaves of Inula viscosa proved effective phytoherbicides for use in organic agriculture. Dodder, pigweed and wild mustard were highly sensitive to the extract and to the ground dry leaves mixed with soil. The phytotoxicity of leaf extract and dry leaves was specific to wheat, cotton and melon crops, whose seedlings were resistant. The active compound was purified and its chemical structure was verified as the sesquiterpene lactone tayunin (C15H20O3). The metabolite was stable under high temperatures, a wide pH range and in long storage. Top Keywords Allelopathic activity, dodder, Inula viscosa, phytoherbicide, sesquiterpene lactone tayunin, weed control. Top | |
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