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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
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(5): 1720-1726
DOI: https://doi.org/10.20546/ijcmas.2019.805.199


Survey and Pathogenicity of Fusarium Wilt Disease in Cotton Fields of Tamil Nadu
C. Mathivathani1, K. Poornima1*, P. Kalaiarasan1 and M. Muthamilan2
1Department of Nematology
2Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore, 641003, Tamil Nadu, India
*Corresponding author
Abstract:

Cotton is an important crop used globally for its natural fibre and seed. Fusarium wilt, caused by the fungus Fusarium oxysporum f. sp. vasinfectum, is a major disease of cotton capable of causing significant economic loss. The fungus persists in soil as chlamydospores and in association with the roots of susceptible, resistant and non-cotton hosts as well as in seed. In the present investigation, the major cotton growing areas of Tamil Nadu were surveyed for assessing the per cent wilt incidence, the maximum disease incidence of 28.47 per cent was recorded at Coimbatore (Loamy) followed by 24.65 per cent at Salem (Clay loam) and a minimum of 7.65 per cent incidence at Madurai with silty loam soil texture. The number of micro conidia was more as compared to macro conidia. Abundant chlamydospores were observed terminally and intercalary. The size of the macro conidia, micro conidia and chlamydospores of the virulent isolate TRY (Trichy) was 26.20x6.25µm, 13.65x4.18µmand11.87x11.48µmrespectively.


Keywords: Cotton, Fusarium oxysporum f. sp. vasinfectum, Wilt incidence
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How to cite this article:

Mathivathani, C., K. Poornima, P. Kalaiarasan and Muthamilan, M. 2019. Survey and Pathogenicity of Fusarium Wilt Disease in Cotton Fields of Tamil Nadu.Int.J.Curr.Microbiol.App.Sci. 8(5): 1720-1726. doi: https://doi.org/10.20546/ijcmas.2019.805.199