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Journal of Plant Sciences
Year: 2012  |  Volume: 7  |  Issue: 3  |  Page No.: 85 - 95

Pathological Assessment of Seed Borne Fungi Involved in Cotton Seedlings Damping-off

Abd El-Rahim M.A. El-Samawaty, Moawad R. Omar, Medhat A. El-Naggar, Mohamed A. Yassin and Osama E. Amer    

Abstract: To determine the involvement of seed born fungi in cotton seedlings damping-off, 39 isolates representing 13 species belonging to seven genera were isolated from seven cotton cultivars and tested on the same cultivars under greenhouse conditions. Obtained results showed that cotton seedling damping off was varied among cultivars as well as within the same cultivar. The occurrence of damping off was dependent upon cultivars responsibility and the virulence of isolate used. It was also found that some tested isolates i.e., Fusarium moniliforme isolate No. 11, Fusarium semitectum isolate No. 20, Macrophomina phaseolina isolate No. 25, Penicillium isolate No. 30 and all tested isolates of Rhizoctonia were capable of infecting all tested cultivars. Tested isolates of Macrophomina phaseolina were highly virulent against different cotton cultivars.

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