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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2019, Volume : 7, Issue : 5
First page : (122) Last page : (130)
Article doi: : http://dx.doi.org/10.18782/2320-7051.7628

Integrated Management of Sclerotium Wilt of Potato Caused by Sclerotium rolfsii Sacc.

Kulkarni V. R.* and Hegde Y. R.
Department of Plant Pathology, College of Agriculture, Dharwad
University of Agricultural Sciences, Dharwad-580005, Karnataka. India
*Corresponding Author E-mail: kulkarnivr@uasd.in
Received: 9.07.2019  |  Revised: 15.08.2019   |  Accepted: 22.08.2019  

 ABSTRACT

Sclerotium wilt/ rot of potato caused by Sclerotium rolfsii Sacc. is one of the major soil borne diseases of potato causing heavy losses every year. The present investigations on integrated management of sclerotium wilt/rot of potato were carried out during Kharif 2005-06 and 2006-07 both at Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Dharwad and in farmer’s fields of Dharwad and Belgaum districts of Karnataka.The results revealed that, pot culture experiments had showed a combination of carboxin and T. harzianum as tuber treatment along with organic amendments like FYM or vermicompost managed the disease to the extent of 88 per cent. The field experiment in farmer's fields confirmed the same results at two locations tested. Maximum suppression of the disease was observed when carboxin (2 g kg-1) and T. harzianum (10 g kg-1) were used for tuber treatment and supplemented with either FYM or vermicompost.
In Dharwad, carboxin + T.harzianum+ FYM (5.56%) treatment T13 recorded significantly least incidence than all other treatments.  Carboxin (10.28%) was next best and was on par with carboxin + T.harzianum (13.05%) and carboxin+ T.harzianum + vermicompost (13.06%). The yield was significantly highest in carboxin+T.harzianum+FYM (13.26 t ha-1) which was on par with carboxin+ T.harzianum+ vermicompost (12.38 t ha-1). In Belgaum carboxin+T.harzianum+FYM (5.28%) was significantly superior to all the treatments followed by carboxin (9.72%), carboxin+T.harzianum(10.28%) and carboxin+T.harzianum+vermicompost (11.12%) which were on par. Yield per hectare was highest in carboxin+T.harzianum+FYM (15.51 t ha-1) than all other treatments except carboxin+T.harzianum+vermicompost (14.43 t ha-1) which was on par.  The highest total returns and additional return over control were obtained in T13carboxin+T.harzianum+FYM followed by carboxin+T.harzianum+vermicompost. But B:C ratio was highest in carboxin (10.20:1). The B: C ratio of IDM trials in farmer's fields showed above 3 for both the years in all the locations. Hence, this IDM technology can be adopted with great confidence by the farming community of the state. The transfer of technology is achieved beyond doubt with ample evidences in farmer's fields of Karnataka.

Keywords: Carboxin, Sclerotium rolfsi, Potato, Trichoderma harzianum, Vermicompost.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Kulkarni. V.R. & Hegde, Y.R. (2019). Integrated Management of Sclerotium Wilt of Potato Caused by Sclerotium rolfsii Sacc. , Ind. J. Pure App. Biosci.7(5), 122-130. doi: http://dx.doi.org/10.18782/2320-7051.7628