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Studies on fungi associated with tomato fruits and effectiveness of some commercial fungicides against three pathogens

  • Plant Mycology And Crop Protection
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Abstract

Among 39 fungal species and one variety belonging to 16 genera isolated from 116 healthy tomato fruits collected from markets in Assiut, Egypt, during 1994,Aspergillus niger was found to be the most prevalent, being isolated from 84.6% of the samples. Of 11 species recovered from 156 diseased tomatoes,Alternaria alternata, Rhizopus stolonifer andA. niger were the most common and isolated from 52.7%, 35.9% and 25.0% of the samples, respectively. Experiments for comparison of the effects of medium containing tomato juice with synthetic medium on the mycelial growth of nine fungal species indicated that, the tomato juice medium was more suitable for growth of all fungal species. The effect of five commercial fungicides and sodium hypochlorite when applied as post-harvest dips after inoculation was studied in laboratory againstA. alternata, A. niger andR. stolonifer. At 10 and 100 µg ml−1, neither of the fungicide caused a noticeable inhibition ofAlternaria rot. At 1000 µg ml−1 benlate, rovral and sumisclex completely preventedAlternaria andAspergillus rot, whereas cuprosan and ridomil were ineffective against rotting caused byA. niger. Rhizopus rot development was inhibited by over 50% with one treatment only (rovral at 1000 µg ml−1). Sodium hypochlorite has good curative properties against fruit rots especially those caused byA. alternata andA. niger.

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Authors and Affiliations

  1. Department of Botany, Faculty of Science, Assiut University, Assiut, Egypt

    A. Y. Abdel-Mallek, S. K. Hemida &  M. M. K. Bagy

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  1. A. Y. Abdel-Mallek
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  2. S. K. Hemida
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  3. M. M. K. Bagy
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Abdel-Mallek, A.Y., Hemida, S.K. & Bagy, M.M.K. Studies on fungi associated with tomato fruits and effectiveness of some commercial fungicides against three pathogens. Mycopathologia 130, 109–116 (1995). https://doi.org/10.1007/BF01103459

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  • DOI: https://doi.org/10.1007/BF01103459

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