Antifungal effect of aqueous extracts of chromolaena odorata and ocimum gratissimum on two pathogenic fungi of vigna unguiculata (l.) walp, in daloa (center-west, Côte D'ivoire)
International Journal of Development Research
Antifungal effect of aqueous extracts of chromolaena odorata and ocimum gratissimum on two pathogenic fungi of vigna unguiculata (l.) walp, in daloa (center-west, Côte D'ivoire)
Received 20th June, 2021; Received in revised form 19th July, 2021; Accepted 24th August, 2021; Published online 27th September, 2021
Copyright © 2021, KOFFI Ahébé Marie Hélène et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study is a contribution to the search for alternative solutions based on plant extracts to fight against phytopathogenic fungi. The objective is to test the effectiveness of doses of aqueous extracts of C. odorata and O. gratissimum on the development of two species of phytopathogenic fungi. The results showed that the extracts inhibit mycelial growth. These extracts significantly reduced the progression of two fungi, Colletotrichum sp. and Rhizoctonia sp. The severity averageratings of the two accessions ranged from 0.16 to 0.82. Rhizoctonia sp caused the most severe symptoms with an average severity of 0.76 and 0.82 respectively in the white and red accession. Colletotrichum sp was less severe on all two cowpea accessions studied with an average severity of 0.28. On the other hand, these extracts significantly reduced the infection of cowpea plants and the development of symptoms. The best yields were obtained with the lowest doses (25 g/l). They could be used in the treatment of cowpea plants and seeds. Research could also be carried out on its herbicidal properties on certain invasive legumes close to cowpeas.
