Abstract
Fusarium semitectum, which occurs frequently among the fungal microflora associated with seedling disease of cotton, was examined using traditional mycological characteristics and molecular methods. The 29 Fusarium semitectum isolates from different cotton-producing areas and different host genotypes in Egypt could be divided undoubtedly into five groups based on cultural characteristics or Dna fingerprinting methods. The isolates showed a high level of variability in aerial mycelia growth, mycelia colour and radial mycelia growth (colony diameter) on potato dextrose agar. The intra-specific genomic relatedness of F. semitectum isolates was detected by Aflp and Rapd-Pcr fingerprinting methods and no particular difference was found between the results with the two fingerprint techniques.
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