ALLELOPATHIC EFFECT OF LANTANA CAMARA L. AND TECTONA GRANDIS L. F. LEAF EXTRACTS ON SEED GERMINATION OF AMARANTHUS SPINOSUS L.

Abstract

The experiment was conducted to evaluate the allelopathic potential of aqueous extracts of Tectona grandis and Lantana
camara on the seed germination of Amaranthus spinosus, a common weed. The present study was conducted under
laboratory conditions. The sterilized seeds were placed in different petri dishes that contain different test concentrations
(5%, 10%, 15% and 20%) of both the leaves. The allelopathic effects of different concentrations of aqueous leaf extracts
on seed germination were recorded and compared with Control (Distilled water) for seven subsequent days. The result
of the present study showed that, the inhibitory effect of allelopathy on seed germination increased with the increase in
concentrations of leaf extracts of both plants. Germination rate and Germination potential were calculated on the basis of
the recorded results. Germination rate was found to be least in 20% of T. grandis and the germination potential was
found to be the lowest in 15% and 20% concentrations of both the leaf extracts. Through this work, we’ve tried to
evaluate the chance of using Lantana and Tectona as two bioresources in developing bioherbicide to manage weeds.