Vol. 5, Issue 2 (2017)
Management of head rot of Cabbage caused by Sclerotinia sclerotiorum through combined application of fungicides and biocontrol Bacillus amyloliquefaciens
Author(s): K Kamesh Krishnamoorthy, A Sankaralingam And S Nakkeeran
Abstract: The pathogen Sclerotinia sclerotiorum infects cabbage leading to a diseased condition called head rot. Symptoms of the disease begin with water soaked lesions on the leaves which enlarge over time. In the final stage of the disease, rotting of the entire cabbage head takes place which is followed by formation of cottony white mycelial growth. The mycelial growth becomes dense leading to development of carbon black coloured resting structures called sclerotia. The effect of eight different fungicides viz., propineb, carbendazim, tebuconazole, nativo (tebuconazole+trifloxystrobin), fosetyl aluminium, tricyclazole, metalaxyl and kresoxim methyl at concentrations of 25, 50, 100 and 250 ppm were evaluated against the growth of Sclerotinia sclerotiorum under in vitro. Results revealed that the fungicide nativo (tebuconazole+trifloxystrobin) was the most effective which inhibited growth of the pathogen at all the four concentrations. This was followed by carbendazim and tebuconazole which exhibited complete inhibition at concentration of 100 and 250 ppm. For field studies the effective fungicides were tested in combination with B. amyloliquefaciens isolate B15. Combined application of B. amyloliquefaciens isolate B15 and nativo was found to be highly effective with the least disease incidence of 8.67 per cent indicating 78.55 per cent reduction over control followed by nativo alone with disease incidence of 8.74 per cent and 78.37 per cent reduction over control. Both the treatments results were on par with each other.
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How to cite this article:
K Kamesh Krishnamoorthy, A Sankaralingam And S Nakkeeran. Management of head rot of Cabbage caused by Sclerotinia sclerotiorum through combined application of fungicides and biocontrol Bacillus amyloliquefaciens. Int J Chem Stud 2017;5(2):401-404.
