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A herbicidal principle fromCaesulia axillaris L., a weed of paddy fields

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Summary

Screening of extracts from weeds of cultivated fields for their herbicidal activity was undertaken. The crude from alkaline aqueous extracts from leaves and stems ofCaesulia axillaris (family Asteraceae), an aquatic weed from paddy fields, gave inhibitory effects in the seed germination test. Separation of the active principle by differential solubility method, and its identification by determination of m.p., b.p., UV-and mass-spectra established it as catechol (1,2-dihydroxybenzene). It was found to have selective herbicidal activity onOcimum sp.,Ammannia sp. andFimbrystylis sp. againstOryza sativa.

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Acknowledgment. J.C.S. is thankful to the authorities of the University Grants Commission, New Delhi, for the award of Teacher Fellowship. Thanks are also due to Dr R.S. Kapil (Central Drug Research Institute, Lucknow) for providing facilities to carry-out chemical investigations. R.A.K.S. and R.C.S. are thankful to the authorities of the C.S.I.R., New Delhi, for providing SRF and Research Associateship respectively. Reprint requests to S.N.M.

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Srivastava, J.C., Srivastava, R.A.K., Srivastava, R.C. et al. A herbicidal principle fromCaesulia axillaris L., a weed of paddy fields. Experientia 39, 898–899 (1983). https://doi.org/10.1007/BF01990427

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  • DOI: https://doi.org/10.1007/BF01990427

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