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Plant Pathology Journal
Year: 2009  |  Volume: 8  |  Issue: 4  |  Page No.: 133 - 143

The Use of Bread Yeast as a Biocontrol Agent for Controlling Seed-Borne Fungi of Faba Bean

M.A. Elwakil, O.A. Awadallah, I.M. El-Refai, M.A. El-Metwally and M.S. Mohammed    

Abstract: Present objective was to study this phenomenon on the common seed-borne fungi of faba bean in soil amended with composted organic wastes and infested with the most commonly isolated fungi from Vicia faba seed. In vitro studies showed that the yeast was effective in reducing the linear growth of Cephalosporium sp., F. verticillioides, F. oxysporum,. F. solani, R. solani and V. dahliae. Pre- and post-emergence damping-off caused by Cephalosporium sp., F. verticillioides, F. oxysporum, F. solani, R. solani and V. dahliae was reduced significantly when seeds of faba bean were coated with a water suspension (109 cfu mL-1) of the yeast before sowing in soil supplemented with compost type (1) (prepared by Mansoura manufacturer with organic waste from city garbage) or type (2) (consisted of 1 ton of horticultural waste and 100 kg sheep manure). Soil was artificially infested with the fungi isolated from faba bean seeds. The above treatment significantly increased plant growth parameters including height, shoot and root length, number of branches/plant, number of pods/plant, pod weight/plant, fresh weight and dry weight. Photosynthetic pigments (chlorophyll A, chlorophyll B and carotenoids) were also increased by the treatments. Total phenols content in the treated plant leaves was higher than in the control plants.

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