Abstract Detail

Ecology/Pathology

Adongbede, Erute Magdalene [1], Egboduku, Wisdom Ogenevwogaga [2].

Effect of medicinal plants extracts on growth of  Collectotrichum gloeosporioides (Penz.) Sacc. Isolated from Carica papaya.

The effect of extracts of 21 medicinal plants used in folklore medicine in the Niger Delta region of Nigeria on the growth of pathogenic fungus Collectotrichum gleosporiodes isolated from Carica papaya was investigated. The study was done using the disc well diffusion method. Ethanol, methanol, n-hexane, chloroform and aqueous extracts of the medicinal plants were introduced into growth medium (PDA) seeded with Collectotrichum gleosporiodes. The effect of the various plant extracts was used to assess their antimicrobial activities simply by measuring the inhibition zones of these extracts around the test organism. The type of solvent used for the extraction affected the inhibitory activities of the extracts and this varied for the different plants. The plant with the highest antimicrobial activity was Azachdiracta indica because it had the highest zone of inhibition. Four medicinal plants recorded significantly higher inhibition zones (n-hexane and methanol of Etlingera elatoir, n-hexane Momordica charantia, Azadirachta indica and Acalypha wilkesiana and Acalypha godseffiana) than the standard antibiotic amphotericin B. the plant Blighia sapinda did not show any activity with the five solvent extracts. Sixty percent of the medicinal plants showed activity against the pathogen. The solvent that showed the strongest activity was methanol. The minimum inhibitory concentration for the plant Azachdirachta indica and Cymbopogon citratus was 50mg/ml and that for Acalypha godseffiana was 10mg/ml. The extracts of the active medicinal plants showed stronger antimicrobial activity than than the standard antimicrobial and therefore these plants could be new source for new antimicrobials against the anthracnose disease of pawpaw.

1 - University of Lagos, Botany, University Road, Akoka, Yaba, Lagos, Lagos, 11011, Nigeria
2 - University of Benin, Botany, Ugbowo Campus, Ugbowo, Benin City, Edo State, Nigeria

Keywords:
Anthracnose
Antimicrobial activity
Minimum inhibitory concentration
Medicinal plants.

Presentation Type: Offered Paper - Paper
Session: 5
Location: Room 103 AB/Kellogg Hotel and Conference Center
Date: Monday, June 9th, 2014
Time: 2:00 PM
Number: 5005
Abstract ID:27
Candidate for Awards:None