Screening and Formulation of Tamarindus Indica and Citrus Limon Extract for Herbicidal Activity Against Parthenium Hysterophous

Abstract

The investigation demonstrated that the aqueous extracts from Tamarindus indica and Citrus limon displayed allelopathic effects on the growth of Parthenium hysterophorus across different concentrations (0%, 25%, 50%, and 75%). These effects resulted in a decrease in chlorophyll content and a reduction in plant height due to inhibited shoot and root elongation. All plants treated with the aqueous leaf extracts of Tamarindus indica and Citrus limon exhibited a significant decline in total chlorophyll content compared to the control treatments. Elevated concentrations of the aqueous seed and leaf extracts led to a more pronounced reduction in both root and shoot length. Moreover, the fresh and dry weight of the tested species significantly decreased after treatment with leaf aqueous extracts of Tamarindus indica and Citrus limon. This study highlights the allelopathic effects found in various plants, influencing neighboring vegetation through mechanisms such as volatilization, leaching, root exudation, decomposition, and herbicidal action.