Abstract
Allelopathy is a biological process where plants affect, often inhibitory, the growth and
germination of other species within their space. This study aimed to demonstrate and
compare the allelopathic effect of Lantana camara and Chromolaena odorata leaf
extracts on plant germination, with Vigna radiata as the test plant. Leaf extracts were
assayed at 10%, 25%, 50%, 75%, and 100% concentrations, and the corresponding
allelopathic effects were compared to that of control. Findings indicated that L. camara
and C. odorata leaf extracts inhibited V. radiata seedling growth and germination in
increasing concentrations, with C. odorata leaf extract exhibiting greater inhibitory
effect. The estimated marginal mean lengths (in cm) of root, hypocotyl, and epicotyl of
V. radiata are 0.917, 5.937, and 3.263 under the control; 0.195, 0.813, and 0.499 under
L. camara; and 0.101, 0.217, and 0.051 under C. odorata, respectively. Phytochemical
analysis showed presence of several allelochemicals in both leaf extracts. These
compounds were suspected to be the primary drivers of the observed allelopathic effect.
It is suggested that the quantitative phytochemical analysis and herbicidal properties of
L. camara and C. odorata be studied further.
Arjay Julio, Carven Tandoc, Daniel Tipace, Yannah Franzine, Elmar Jon, Ken Joseph, Zyrene Yanesa. (2019) Allelopathic effect of Lantana camara and Chromolaena odorata leaf extracts on plant germination, Asian Journal of Agriculture and Biology, Volume 7, Issue 2.
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