Activity of extracts from Euphorbia species on the germination of Striga species |
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| Authors: | N E IBRAHIM A G T BABIKER† W G EDWARDS C PARKER |
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| Institution: | Gezira University Preparatory College;Agricultural Research Corporation, Gezira Research Station, Wad Medani, Sudan, Agricultural Research Council, Weed Research Organization, Begbroke Hill, Yarnton, Oxford 0X5 1PF, U.K. |
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| Abstract: | Aqueous extracts of fifteen Euphorbia species induced germination of Striga hermonthica (Del.) Benth. seeds to varying extents. Extracts from E. supina Raf., E. pilulifera Jacq., E. acalyphoides Hochst. ex. Boiss, E. prunifolia (Jacq.) Hort. Schoent., E. hirta L., E. aegyptiaca Boiss, E. splendens Boj., and E. granulata Forsk, were the most active. Extracts from E. acalyphoides and E. pilulifera were inhibitory at high concentrations. Undiluted extracts from E. pilulifera, E. aegyptiaca and E. hirta induced haustorial initiation. The stimulatory substance(s) were widely distributed in plants of E. aegyptiaca. Extracts from E. aegyptiaca also stimulated seed germination and haustorial initiation in a range of Striga species and strains. |
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