Articles
THE ANTIFUNGAL AND NEMATICIDAL POTENTIALS OF VERNONIA AMYGDALINA (DAL)
Article number
853_43
Pages
357 – 362
Language
English
Abstract
The study sets out to identify the antifungal and nematicidal potentials of the African bitter leaf (Vernonia amygdalina) on cowpea pathogens.
In order to verify the antifungal potentials of V. amygdalina extracts, the leaves were collected from various farms at the National Horticultural Research Institute (NIHORT, Ibadan). At the various points of collection, farmers were interviewed on the various medicinal uses of V. amygdalina.
The collected leaves were sun-dried and ethanol and aqueous extracts were prepared from the dried leaves. Colletotrichum lindemuthianum (causal pathogen of the anthracnose disease of cowpea) was then isolated from an infected field and plated on potato dextrose agar mixed with 5 ml of 0%, 5% and 10% of the plant extracts.
The various concentration of V. amygdalina were found to produce a fungi static substance that prevented the maturation of mycelia in C. lindemuthianum. To test for the nematicidal potential of V. amygdalina, the various concentrations were also tested in vitro (in glass blocks) on eggs and juveniles of root knot nematodes infecting cowpea plants.
The various concentrations of the plant extracts were found to prevent egg hatch, and causes the demobilization of juvenile of root-knot nematode.
Further studies are recommended on the appropriate use of V. amygdalina in vivo.
In order to verify the antifungal potentials of V. amygdalina extracts, the leaves were collected from various farms at the National Horticultural Research Institute (NIHORT, Ibadan). At the various points of collection, farmers were interviewed on the various medicinal uses of V. amygdalina.
The collected leaves were sun-dried and ethanol and aqueous extracts were prepared from the dried leaves. Colletotrichum lindemuthianum (causal pathogen of the anthracnose disease of cowpea) was then isolated from an infected field and plated on potato dextrose agar mixed with 5 ml of 0%, 5% and 10% of the plant extracts.
The various concentration of V. amygdalina were found to produce a fungi static substance that prevented the maturation of mycelia in C. lindemuthianum. To test for the nematicidal potential of V. amygdalina, the various concentrations were also tested in vitro (in glass blocks) on eggs and juveniles of root knot nematodes infecting cowpea plants.
The various concentrations of the plant extracts were found to prevent egg hatch, and causes the demobilization of juvenile of root-knot nematode.
Further studies are recommended on the appropriate use of V. amygdalina in vivo.
Authors
O.O. Fadina
Keywords
phytotoxicity, nematicidal, antifungal, fungistatic juveniles
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