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P. S. Prasad ¹, Muhammad Saifulla ¹, M. Mahesh ¹, G. N. Veera Kumar ²

Affiliations
1 Department of Plant Pathology, UAS, GKVK, Bangalore 560 065, IN
2 AICRP on pigeonpea, ZARS, GKVK, Bangalore 560 065, IN

Abstract

Integrated Disease Management (IDM) approach was carried out to combat pigeonpea wilt with a combination of fungicides, bio agents, organic amendments and different cropping systems in kharif seasons of four years viz., 2006, 2007, 2008 and 2009. Based on the performance, four treatments were identified as best practices for the management of pigeonpea wilt viz., carbendazim seed treatment @ 2 g/kg of seeds + Trichoderma viride @ 2.5 kg/ha in FYM @ 50 kg / ha recorded lowest mean wilt incidence of 11.38 per cent with highest mean yield of 969.18 kg/ha, followed by carbendazim seed treatment @ 2g/Kg of seeds + ZnSo4 @ 25 kg/ha which recorded mean wilt incidence of 11.75 per cent with mean yield 951.25 kg/ha. However, Trichoderma viride seed treatment @ 5g/kg of seeds + Trichoderma viride @ 2.5 kg/ha in FYM @ 50 kg/ha which recorded mean wilt incidence of 11.97 per cent and yield of 929.63 kg/ha and pigeonpea intercrop with sorghum @ 1:1 recorded mean wilt incidence of 17.62 per cent and yield of 632.18 kg/ha were also found effective in controlling wilt incidence and increasing yield compared to untreated control which recorded highest wilt incidence of 53.04 per cent and lowest yield (314.95 kg/ha).

Keywords

Pigeonpea, Wilt, Fusarium Udum, Fungicide, Bio-Agent.

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Gowdra Nagamma ¹, Muhammad Saifulla ², S. Pavithra ¹, S. R. Suresh ³

Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, GKVK, BENGALURU (KARNATAKA), IN
2 AICRP on Chickpea, Zonal Agricultural Research Station, (UAS, GKVK), BENGALURU (KARNATAKA), IN
3 Department of Plant Pathology, University of Agricultural Sciences, DHARWAD (KARNATAKA), IN

Abstract

To find out the best sources of nutrients for the fungal growth, different solid media were tested. Maximum radial growth was recorded on PDA and Czapek's agar with mean colony diameter of 90mm and on par with each other compared to other media tested. Carrot agar recorded maximum number of sclerotial production (48 per microscopic field) followed by PDA (46 per microscopic field) and the minimum sclerotial production was observed in Czapek's agar (39.33 per microscopic field). PDA and carrot media supported good mycelial growth and sclerotia production. The maximum sclerotial size was observed in PDA (0.5×0.4 μm) whereas Czapek's agar recorded minimum size of sclerotia (0.3×0.2 μm). Ellipsoidal shape of sclerotia was observed in Czapek's agar whereas, irregular shaped sclerotia were observed in other media. Maximum dry mycelial weight was recorded eighth day of incubation (150mg).

Keywords

Chickpea, Macrophomina phaseolina, Sclerotia, Solid Media.

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