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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 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - 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(9): 1051-1058
DOI: https://doi.org/10.20546/ijcmas.2020.909.131


Evaluation of Different Fungicides against Alternaria macrospora Zimm. inciting Leaf Blight in Cotton under in vitro
Rajesha1*, S. Nakkeeran2, T. Indumathi2, P. Adhipathi2 and A. Chandrasekar2
1ICAR Research Complex for NEH Region, Nagaland Centre,
Medziphema, 797106 Nagaland, India
2Department of Plant Pathology, Tamil Nadu Agricultural University,
Coimbatore-641003, Tamil Nadu, India
*Corresponding author
Abstract:

Alternaria leaf blight caused by Alternaria macrospora Zimm.is devastating foliar disease in cotton (Gossypium spp.) occur in all the major growing regions of cotton. The experiment of evaluation of fungicides was conducted against the Alternaria macrospora pathogen causal agent of leaf blight of cotton. The nine viz., azoxystrobin, chlorothalonil, difenoconazole, propiconazole, tebuconazole, trifloxystrobin, copper oxy chloride, mancozeb and propineb were screenedunder in-vitro and per cent inhibition of radial growth of mycelia was calculated. All the fungicides were found effective against A. macrospora and caused significant mycelial growth inhibition of test pathogen over untreated control. difenoconazole and propineb were effective fungicides in inhibition of 100% radial growth of pathogen among the systemic and contact fungicides respectively at lower fungicide concentration of 500 ppm. Five fungicides viz., azoxystrobin, propiconazole, trifloxystrobin, copper oxy choloride, mancozeb were recorded 100% inhibition at 750 ppm concentration. In 1000 ppm concentration all the fungicides were showed the 100% inhibition in all the fungicides except tebuconazole.


Keywords: Alternaria macrospora, Cotton, Fungicides, Inhibition
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How to cite this article:

Rajesha, G., S. Nakkeeran, T. Indumathi, P. Adhipathi and Chandrasekar, A. 2020. Evaluation of Different Fungicides against Alternaria macrospora Zimm. inciting Leaf Blight in Cotton under in vitro.Int.J.Curr.Microbiol.App.Sci. 9(9): 1051-1058. doi: https://doi.org/10.20546/ijcmas.2020.909.131