ISSN 2169-303X
International Journal of Medicinal Plants Research ISSN 2169-303X Vol. 9 (3), pp. 001-004, March, 2020. © International Scholars Journals
Full Length Research Paper
Effects of three plant extracts (Ocimum gratissimum, Acalypha wilkesiana and Acalypha macrostachya) on post harvest pathogen of Persea americana
Erute Magdalene Ogbo* and A. E. Oyibo
Department of Botany and Microbiology, Delta State University, Abraka, Nigeria
Accepted 16 October, 2019
Abstract
Disease assessment of Persea americana (Avocado) in a local market in Delta State Nigeria showed that only 7% of the fruits were healthy. 36% of the avocado fruits had Cercospora spot; 28% had Diotherella rot and 29% had anthracnose. Plant extracts of three different species; Ocimum gratissimum, Acalypha wilkesiana and Acalypha macrostachya were assessed for inhibitory effect on the radial growth of Cercospora purpurea. Ethanol extracts of the three plants caused total inhibition of C. purpurea. Crude extract of sterilized and un-sterilized water significantly reduced the radial growth of the fungus. However, the fungistatic effect of O. gratissimum was highest and was followed by A. macrostachya and then A. wilkesiana.
Key words: Plant extracts, inhibition, cercospora spot, antifungal, disease assessment.