Fatunbi, A. O.; Dube, S.; Yakubu, M. T.; Tshabalala, T.
Author Affiliation :
Agricultural and Rural Development Research Institute (ARDRI), University of Fort Hare, PB x 1314, Alice 5700, South Africa.
World Applied Sciences Journal
The allelopathic potential of the leaves (Lv), leaves+stem (LvS), bark and root of Acacia mearnsii was studied. This was done by examining the effect of aqueous extract and the plant debris on seed germination and emergence of cabbage (Brassica oleracea), African love-grass (Eragrostis curvula) and maize (Zea mays). Germination of cabbage and African love-grass were significantly (P<0.05) inhibited by the different concentration (10 g/l, 20 g/l and 40 g/l) of plant parts extracts. The germination inhibition was in the reducing order of LvS > Lv > Root > Bark. Germination index was lower in all the extract treatments compared to the control for both cabbage and African love-grass. This implies that extracts of all the plant parts exhibited varying degree of inhibition to seed germination. The application of debris from various parts of A. mearnsil resulted in 6.7-46.7%, 50-70% and 0-33% suppression in the emergence of cabbage, African love-grass and maize seeds respectively. This study lends scientific evidence to the allelopathic potentials of A. mearnsii and the variation in effect among different parts of the plant. We, therefore, conclude that A. mearnsii may be further explored in the biological control of weeds.
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Organism descriptor(s) :
Acacia mearnsii, Brassica oleracea var. capitata, Brassicales, Eragrostis curvula, plants, Zea mays
allelopathy, biological control, biological control agents, cabbages, leaves, maize, natural enemies, non-wood forest products, plant extracts, roots, seed germination, seedling emergence, seedlings, seeds, stems, weed control, weeds
biocontrol, biocontrol agents, biological control organisms, Capparales, corn, late black wattle, minor forest products, non-timber forest products
Broader term(s) :
Acacia, Mimosoideae, Fabaceae, Fabales, eudicots, angiosperms, Spermatophyta, plants, eukaryotes, Brassica oleracea, Brassica, Brassicaceae, Brassicales, Eragrostis, Poaceae, Poales, commelinids, monocotyledons, Zea