植物病理学および微生物学ジャーナル

概要

In Vitro Inhibition of the Vegetative Growth of the Fungus, Hendersonia celtifolia, Associated with Foliar Leaf Spots of Erythrina senegalensis, Using the Leaf Extracts of Vernonia amygdalina L and Aspilia africana L

Ibiam OFA and Nwalobu IP

This study is to determine potential use of crude leaf extracts of Vernonia amygdalina and Aspilia africana for the control of Hendersonia celtifolia isolated from leaves of Erythrina senegalensis at concentrations: 500 mg/ml, 1000 mg/ml, 2000 mg/ml, 25000 mg/ml. The result of this study showed that there was significant difference (P>0.05) between the treatment and the control. The result also showed that from the first day, the level of growth of the fungus was significantly higher in the control than in the treatment. The effect of the leaf extracts on fungal growth was high as the concentrations increased, and there was a significant variation (P>0.05) in the treatment. The level of inhibition of the vegetative growth of fungus was concentration dependent as increase in concentration of the test leaf extracts from the two plants caused decrease in the vegetative growth of the fungal organism. Comparatively, the anti-fungal activity of leaf extracts from both plants showed that the leaf extracts of Apilia africana gave a better inhibitory activity than that of Vernonia anygdalina from concentrations 1500 mg/ml to 2500 mg/ml.