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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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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 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

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

Int.J.Curr.Microbiol.App.Sci.2020.9(1): 1549-1554
DOI: https://doi.org/10.20546/ijcmas.2020.901.172


Survey of Purple Blotch of Onion (Alternaria porri) in major Onion Growing Area in Nashik, India
B. Sonawane*, J. K. Dhemre, M. P. Badgujar and S. D. Gaikwad
Onion Grape Research Station, Pimpalgaon Baswant, Nashik (MS) – 422 209, India
*Corresponding author
Abstract:

Onion purple blotch caused by the fungus Alternaria porri is a major yield limiting factor in onion growing area. A survey was conducted to assess purple blotch disease severity in onion during kharif 2019 in Nashik district. The purple blotch disease severity ranged from  27.20 to 52.80 per cent. The highest disease severity noticed in Satana tahasil (52.80%) and lowest disease intensity was recorded in Nandgaon tahasil (27.20%) during kharif 2019. The highest purple blotch of onion was followed by Deola (51.20 %), Niphad (48.80%), Malegaon(43.20%), Chandwad (37.60%), Yeola (33.60%) and Sinnar (28.80%), respectively It was observed that purple blotch of onion is a major problem in Nashik district of Maharashtra. Maximum severity of purple blotch was recorded due to climatic conditions vi., high relative humidity (80 to 90 %) and optimum temperature (24+20C), mono cropping, existence of inoculum of previous crop in particular location and cultivation of same or local varieties in larger scale. Diseased samples were collected from the surveyed field to record disease severity and utilised for isolation of pathogen. On the basis of isolation  and morphological study, the pathogen was identified as Alternaria porri (Ellis) Cif. The Alternaria porri was observed in morphological studies in all tahasils of Nashik district during survey carried out in kharif -2019.


Keywords: Onion, Purple blotch, disease severity, A. porri
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How to cite this article:

Sonawane, R. B., J. K. Dhemre, M. P. Badgujar and Gaikwad, S. D. 2020. Survey of Purple Blotch of Onion (Alternaria porri) in major Onion Growing Area in Nashik, India.Int.J.Curr.Microbiol.App.Sci. 9(1): 1549-1554. doi: https://doi.org/10.20546/ijcmas.2020.901.172