Management of Seed-Borne Fungi in Cowpea Using Leaf Extracts and Sodium Bicarbonate
The study investigated the in-vitro antifungal activities of sodium bicarbonate (NaHCO3) and leaf extracts of Vernonia amydgalina (bitter leaf) and Azadirachta indica (neem) on fungal species isolated from two cowpea cultivars; IFE BROWN and Drum (a local cultivar). Concentrations of 1.95 mg/ml and...
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Veröffentlicht in: | Journal of Applied Sciences and Environmental Management 2018-05, Vol.22 (4), p.565 |
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Zusammenfassung: | The study investigated the in-vitro antifungal activities of sodium
bicarbonate (NaHCO3) and leaf extracts of Vernonia amydgalina (bitter
leaf) and Azadirachta indica (neem) on fungal species isolated from
two cowpea cultivars; IFE BROWN and Drum (a local cultivar).
Concentrations of 1.95 mg/ml and 1.43 mg/ml were used for A. indica
while 1.45 mg/ml and 1.15 mg/ml were used for V. amydgalina. Sodium
bicarbonate was evaluated on all the isolates at 2.0 mg/ml and 3.0
mg/ml. The inhibitory effects of these antifungal agents were compared
with benlate (a synthetic fungicide) on Potato Dextrose Agar. Benlate
totally inhibited all the fungal isolates. Candida species isolated
from the two cowpea cultivars were greatly inhibited by the antifungal
agents while Trichoderma species isolated from IFE BROWN was the
least inhibited. The inhibitory effects of NaHCO3 and A. indica on
Candida spp. were not significantly different and values ranged from
74.5% to 84%. The two concentrations of A. indica had better inhibitory
effect on Pythium spp. than NaHCO3. Vernonia amydgalina at 1.45 mg/ml
inhibited A. niger and Candida spp. by 83.75% and 87.5% respectively
while NaHCO3 at 2.0 mg/ml inhibited Rhizopus stolonifer isolated from
Drum by 75%. The study concludes that the two plant extracts and sodium
bicarbonate had broad spectrum activities on fungal species and are
therefore recommended as alternatives to toxic and synthetic
fungicides. |
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ISSN: | 1119-8362 2659-1502 2659-1499 |
DOI: | 10.4314/jasem.v22i4.23 |