Abstract
Indian mustard [Brassica juncea (L.)] is a major oilseed crop, grown in rabi season in India. Sclerotinia stem rot, stem blight or white rot disease caused by Sclerotinia sclerotiorum (Lib.) de Bary is a serious problem in mustard crop in Northern India. The present investigations were undertaken to understand the role of fertilizers and organic amendments on disease development in mustard crop under field conditions. In experiment 1, the effect of nitrogen, phosphorus and potash fertilizers with different levels on the development of Sclerotinia stem rot and on seed yield was studied during two years. The treatment was a combination of 80 kg N, 60 kg P and 60 kg K ha-1 which was applied significantly superior over control (without fertilizers) in disease control (60.42%) and increased seed yield (13.80 q ha-1). Application of 100 kg N, and 60 kg P ha-1 without K was found to be least effective for disease management. In experiment 2, effect of five soil amendments, that is, mustard cake, neem cake, vermicompost, farm yard manure and sulphur on the development of Sclerotinia stem rot was studied. Neem cake applied at 1 ton ha-1 was found significantly superior with minimum disease incidence (20.43%), minimum disease intensity (15.00%), maximum disease control (63.27%) and increased seed yield (14.07 q ha-1) over control (without amendments). The vermicompost and FYM applied at 15 ton ha-1 were also found effective in minimizing disease intensity and increased seed yield. Key words: Fertilizers, Indian mustard, soil amendments and Sclerotinia stem rot.
Highlights
Effe ects of fertiliz zers an nd soill amen ndments on tthe incidence of o Scle erotinia a stem m rot in Indian n musttard
The e present inv vestigations s were underrtaken to understand the role of fertilizers and a organic amendments s on diseas se development in mustard crop un nder field conditions
In experiment 1, the effect phorus and potash ferttilizers with different e of nitrrogen, phosp levels on th he developm ment of Sclero otinia stem rot r and on s seed yield wa as studied during two ye ears
Summary
Effe ects of fertiliz zers an nd soill amen ndments on tthe incidence of o Scle erotinia a stem m rot in Indian n musttard Sclerotinia stem rot is an economically important yield reducing disease that has been widely reported in the last few years in India and elsewhere. Sclerotiorum the present study was undertaken to find out role of fertilizer doses (NPK) and soil amendments (neem cake, mustard cake, vermicompost, farm yard manure and sulphur dust) on disease severity and yield of mustard.
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