National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The field survey had done to isolate and diagnose the fungus Alternaria alternata on Rosa damascena that Collected from three nurseries in Maysan province, as well as pathogenicity for therse isolates done. The results showed that the highest rate of injury in the nursery Alzhor was 97.2 %. Then after the nursery Alsalam percentage of injury was 96.3 % and Significant differences compared to the nursery Altor rate of injury was 70.9%. It has been isolated and diagnosed four isolates of the fungus A. alternata from the plant leaves Rosa damascena that showed symptoms of disease leaves spotted and diagnosed isolates by comparing the phenotypic characteristics of the fungus pathogen on PDA medium, the results showed the presence of different degrees of pathogenicity according to the isolation, Isolation A2 were more pathogenesis ability was 79.5% followed by isolates (A1, A3, A4) were (72.2, 68.2 and 63.7%) respectively. Significant differences were observed for all isolates compared to the control treatment. This is the first record of the fungus Alternaria alternata on this plant in Iraq.
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