Allelopathic interaction among Parthenium hysterophorus Linn., Cassia tora Linn. and Croton bonplandianum Baill.
Allelopathic effects of roots, stems and leaves extract of Parthenium hysterophorus on the seed germination of Cassia tora and Croton bonplandianum and vice-versa have been worked out. The extracts of Cassia and Croton significantly suppressed the germination of P. hysterophorus. Increase in extract concentration promoted the inhibitory potential.