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- Title
Morphological and Pathogenic Variability among Macrophomina phaseolina Isolates Associated with Maize (Zea mays) in Punjab-Pakistan.
- Authors
Ashraf, Waqas; Sahi, Shahbaz Talib; Haq, Imran ul; Ahmed, Sohail
- Abstract
Macrophomina phaseolina (Tassi) Goid. is a serious pathogen of charcoal rot disease in the maize plant recently in Punjab, Pakistan. In order to initiate monitoring of this pathogen, 24 isolates of M. phaseolina from four districts of Punjab province of Pakistan were collected to assess the variations in morphology and virulence on the maize plant. Regarding to the geographic origins, significant differences were observed in radial mycelial growth, sclerotial size, sclerotial population per unit area and virulence among the isolates. Thirteen isolates were rated as fast growing (77.10-88.10 mm), seven as medium growing (66.00-77.00mm), and the rest as slow growing (54.00-65.00 mm). Eight isolates produced large sized sclerotia (> 45μm), eleven produced medium sized (40-45 μm), and the remaining five isolates produced small sized sclerotia (< 40 μm). Three isolates exhibited abundant sclerotial population (91.10-108.10), six exhibited average sclerotial population (74.00-90.00), while the rest of the isolates exhibited low sclerotial population (56.00-73.00)/9mm disc of culture. Nine isolates of diverse origin proved to be highly virulent; eight isolates were regarded as moderately and seven fungal isolates appeared to be least virulent against maize cultivars. The discussion is about these morphological and pathogenic variations in various isolates of M. phaseolina as base line information for disease management and development of resistant cultivars against charcoal rot disease. © 2015 Friends Science Publishers
- Subjects
PUNJAB (Pakistan); FUNGAL morphology; MACROPHOMINA phaseolina; PHYTOPATHOGENIC fungi; CORN
- Publication
International Journal of Agriculture & Biology, 2015, Vol 17, Issue 5, p1037
- ISSN
1560-8530
- Publication type
Article
- DOI
10.17957/IJAB/15.0020