Allelopathic effect of three serious weeds of Nigerian savanna on germination seedling vigour of soybean and maize

Singh, S.P.; Pal, U.R.; Luka, K.

Journal of Agronomy and Crop Science 162(4): 236-240

1989


ISSN/ISBN: 0931-2250
DOI: 10.1111/j.1439-037x.1989.tb00712.x
Accession: 001750312

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Abstract
Allelopathic effects of aqueous extract of Ageratum conyzoides, Imperata cylindrica and Commelina benghalensis from Nigerian savanna were investigated on the germination and seedling vigour of soyabeans and maize. Aqueous extracts of I. cylindrica and C. benghalensis at 1 and 5% concn (w/v) stimulated soyabean germination but a 10% aqueous extract of all weeds inhibited the germination of both soyabean and maize seeds. Length of roots and shoots and FW of seedlings were promoted by up to 5% aqueous extracts of A. conyzoides in soyabeans, whereas all concn stimulated the seedling vigour of maize. Aqueous extracts of I. cylindrica up to 5% also stimulated the seedling vigour of both crops but such effects were less than those observed with A. conyzoides. By contrast, the aqueous extract of C. benghalensis at all concn reduced seedling vigour of soyabeans and maize.

Allelopathic effect of three serious weeds of Nigerian savanna on germination seedling vigour of soybean and maize