Assessment of allelopathic efficacy of Parthenium hysterophorus L. plant parts on seed germination and seedling growth of Phaseolus vulgaris L.

Tahseen, N. K. Hemanth Kumar and Shobha Jagannath

Abstract
In the current study an endeavor was been made to appraise the allelopathic effects of Parthenium hysterophorus L. leaf, stem and flower extracts on growth and seedling related traits of Phaseolus vulgaris L. The Parthenium hysterophorus leaf, stem and flower extracts showed inhibitory activity on germination, shoot length, root length, seed vigour, tolerance index, root length, shoot length, fresh and dry weight of bean seedlings. All the parameters were found to be decreased with increase in the concentration of aqueous leaf, stem and flower extracts except phytotoxicity, when compared to control. The maximum and minimum value was observed for all these parameters in 2% and 10% concentration, except phytoxicity respectively, when compared to control. The result of the present study showed that inhibitory effects of Parthenium hysterophorus leaf, stem and flower extracts that may be due to the presence of some allelochemicals.

Keywords
Allelopathy, Bean, Parthenium.

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