Research Report

Activities of Leaf Extracts of Cashew (Anacardium occidentale L.) and Pawpaw (Carica papaya L.) against Mycelia Growth of Aspergillus Species Obtained from Decayed Cashew Fruits  

O.O. Oladele , M.A. Ishola
Department of Biology, The Federal Universty of Technology Akure, Ondo State, Nigeria
Author    Correspondence author
Medicinal Plant Research, 2017, Vol. 7, No. 5   doi: 10.5376/mpr.2017.07.0005
Received: 30 Jul., 2017    Accepted: 23 Aug., 2017    Published: 31 Aug., 2017
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Oladele O.O., and Ishola M.A., 2017, Activities of leaf extracts of cashew (Anacardium occidentale L.) and pawpaw (Carica papaya L.) against mycelia growth of Aspergillus species obtained from decayed cashew fruits, Medicinal Plant Research, 7(5): 34-38 (doi: 10.5376/mpr.2017.07.0005)


The activities of leaf extracts of cashew (Anacardium occidentale) and pawpaw (Carica papaya) were investigated against mycelia growth of Aspergillus niger and Aspergillus flavus in vitro. The leaves were dried at 28±2°C for a period of 5 days after which they were grinded using a mechanized blender. The leaf extracts obtained using aqueous extraction was used for the antifungal assay. The concentration of the extracts used was 2% and 6% both for cashew and pawpaw. The phytochemical screening of each extracts was carried out. The antimicrobial activity of each extracts against each test isolate was assayed using agar well diffusion method. By 72 hours of incubation, the order of zones of inhibition of A. niger with the tested extracts and concentrations was 6% pawpaw leaf extract > 2% cashew leaf extract > 6% cashew leaf extract > Mancozeb > 2% pawpaw leaf extract. Similarly, the order of zones of inhibition of the tested extracts and concentrations against mycelia of A. flavus was 6% cashew leaf extract > Mancozeb > 2% cashew leaf extract > 6% pawpaw leaf extract >2% pawpaw leaf extract. The antifungal activity of the leaf extracts could be attributed to the different classes of phytochemical present in them.

Aspergillus niger; Aspergillus flavus; Cashew extract; Pawpaw extract; Mycelia; Inhibition zone
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