National Academy of Agricultural Sciences (NAAS)
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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 2018: 95.39 NAAS RATING 2020: 5.38 |
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.
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