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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
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Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(8): 3284-3291
DOI: https://doi.org/10.20546/ijcmas.2018.708.350


Studies on Cultural and Physiological Variability of Alternaria porri (Ellis) Cif. – A Causative of Purple Blotch of Onion (Allium cepa L.)
R.U. Priya1, Arun R. Sataraddi2 and T.R. Kavitha1
1University of Agricultural sciences, Bengaluru, Karnataka, India
2KVK, Bagalkot, UAS, Dharwad - 580 005, Karnataka, India
*Corresponding author
Abstract:

Onion (Allium cepa) is an important spices crop commercially grown in India. The production of bulbs is limited by certain diseases. The most serious one is the purple blotch caused by Alternaria porri (Ellis) Cif. Variability studies on cultural and morphological features of the pathogen are of immense use in understanding the nature of the pathogen. In this regard an experiment was conducted and it was revealed that the growth of the fungus was significantly highest (8.8 cm) in Czapeck's agar and lowest was in Tochinai’s agar (4.5 cm). The Isolate Ap5 has recorded maximum radial growth (8.2 cm). Majority of isolates were produced brown and black pigmentation in Czapeck’s agar media and medium fluffy growth with smooth margin and submerged topography with poor to good sporulation. The size of conidia of six isolates ranged from 27.13 x 5.6 μm to 101.6 x 17.2 μm with a beak length ranged from 26.60 μm to 90.20 μm. Horizontal septum was 6 to 12 and vertical septa were 1 to 3.


Keywords: Alternaria porri, Purple blotch disease, Onion, Cultural and morphological variability
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How to cite this article:

Priya, R.U., Arun R. Sataraddi and Kavitha, T.R. 2018. Studies on Cultural and Physiological Variability of Alternaria porri (Ellis) Cif. – A Causative of Purple Blotch of Onion (Allium cepa L.).Int.J.Curr.Microbiol.App.Sci. 7(8): 3284-3291. doi: https://doi.org/10.20546/ijcmas.2018.708.350