Abstract :
An experiment was carried out to assess the allelopathic effect of leaf extract of Ageratum
conyzoides on germination and seedling growth in Arpan and Sapna varieties of Pisum sativum at
various concentrations viz. 10, 20, 30 and 40% in the laboratory. The results revealed that all the
germination and seedling growth attributes to both varieties of pea were significantly inhibited by
the influence of water extract at various concentrations as compared to control. Lowest germination
percentage, germination index, root and shoot length, seedling dry weight and seedling vigour index
in pea varieties was observed by the effect of water extract of Ageratum conyzoides at 10%
concentration. The seed germination, plumule and radicle length were reduced with increasing
concentration of aqueous solution. The study concluded that increasing concentration of leaf extract
of Ageratum conyzoides has adverse effects on germination, shoot length, and root length and
biomass production of Pisum sativum than the control.
Keyword :
Ageratum, Allelochemicals, Allelopathic effect, Leaf extract, Pisum sativum.