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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 11, No. 2, 2007, pp. 165-168
Bioline Code: ja07042
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 11, No. 2, 2007, pp. 165-168

 en Control of Bean Rust using Antibiotics Produced by Bacillus check for this species in other resources and Streptomyces check for this species in other resources species - Translocation and Persistence in Snap Beans
Wagacha, J.M.; Muthomi, J.W.; Mutitu, E.W. & Mwaura, F.B.

Abstract

Antibiotic culture filtrates produced by Bacillus check for this species in other resources (CA5) and Streptomyces check for this species in other resources spp. were tested for translocation and persistence when applied on snap beans inoculated with rust ( Uromyces appendiculatus check for this species in other resources ) in greenhouse pot experiments. The antibiotics were applied on the first trifoliate leaves and translocation was assessed as the number of rust pustules on non-treated leaflets or trifoliates while persistence was assessed as the number of rust pustules on rust infected plants at different times after antibiotic treatment. The treatments were replicated three times, each replicate consisting of a pot containing three plants. Antibiotics from both Bacillus and Streptomyces were found to have up to 100% trans-lamina and leaflet-to-leaflet translocation but no significant trifoliate-totrifoliate translocation. The antibiotic culture filtrates also retained significant rust control for up to 10 days after application on the bean plant. However, no significant rust control was found on the plants after 16 days of treatment. The study indicated that the antibiotics produced by antagonistic Bacillus and Streptomyces species possess systemic activity that can persist within the plant for over one week. These metabolites are potential bean rust control products that could be incorporated in integrated disease management programs

 
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