P. OUDHIA [Positive (inhibitory) allelopathic effects of some obnoxious
weeds on germination and seedling vigour of pigeonpea (cajanus cajan
L.)]. Res. on Crops 1 (1) : 116-118 (2000). Department of Agronomy,
Indira Gandhi Agricultural University, Raipur-492 001, India

ABSTRACT

Due to non-availability of any information on allelopathic effects of
aqueous extracts of Parthenium hysterophorus, Lantana camara and
jatropha curcas on germination and seedling vigour of pigeonpea, a pot
culture study was conducted during 1999-2000. To prepare extracts, the
crushed leaves were allowed to decay for 24 h in distilled water in
different ratio of 1 : 10 and 1 : 15 w/v (weed material : water).
Pigeonpea seeds were soaked in extracts for 24 h. Different extracts
produced significant positive (inhibitory) allelopathic effects of
germination and seedling vigour of pigeonpea.

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