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International Journal of Microbiology
Volume 2017, Article ID 2814581, 6 pages
Research Article

Control of Passion Fruit Fungal Diseases Using Essential Oils Extracted from Rosemary (Rosmarinus officinalis) and Eucalyptus (Eucalyptus agglomerata) in Egerton University Main Campus Njoro, Kenya

1School of Biological Sciences, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
2Department of Biological Sciences, Egerton University, P.O. Box 536, Njoro, Kenya

Correspondence should be addressed to Paul Njenga Waithaka; moc.oohay@jnakahtiaw

Received 22 December 2016; Revised 18 March 2017; Accepted 20 March 2017; Published 28 March 2017

Academic Editor: Giuseppe Comi

Copyright © 2017 Paul Njenga Waithaka 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.


Growth of fruits which form an important part of human diet has been jeopardized by the many fungal diseases that are present today. This study was conceived to isolate the most common fungal pathogens in passion fruits. Fungi were isolated using potato dextrose agar in addition to characterization using morphological, cultural, and biochemical means. Extraction of essential oils from rosemary (Rosmarinus officinalis) and eucalyptus (Eucalyptus agglomerata) was done. Before carrying the sensitivity test of essential oils to the fungal isolates, constituents of the essential oils were determined. The most common fungal pathogens isolated from passion fruits were Alternaria spp. (45%), Fusarium spp. (22%), Colletotrichum spp. (17%), and Penicillium spp. (16%). There was a relationship between heating time and yield of essential oils in rosemary () and eucalyptus (). Conversely, there was no significant difference in the amount of essential oils produced by rosemary and eucalyptus (). Furthermore, there was a significant difference in growth inhibition of the fungal pathogens between essential oils from rosemary and eucalyptus (). Fungal pathogens isolated from passion fruits can be controlled using essential oils from rosemary and eucalyptus. The oils need to be produced in large scale.