Y. Sindhu Keerthana1, T. Srinivas2, R. Sarada Jayalakshmi Devi3 and A. SriVidhya4
1Department of Plant Pathology, S.V. Agricultural College, Tirupati, 517502, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India
2Krishi Vigyan Kendra, Banavasi, Kurnool, 518360, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India
3Department of Plant Pathology, S.V. Agricultural College, Tirupati, 517502, Acharya N. G. Ranga Agricultural University, Lam, Guntur, 522034, Andhra Pradesh, India
4Department of Genetics and Plant Breeding, Institute of Frontier Technology, RARS, Tirupati, 517502, Acharya N. G. Ranga Agricultural University, Lam, 522034, Andhra Pradesh, India
Email: thumati28@gmail.com
Received-22.11.2021, Revised-12.12.2021, Accepted-23.12.2021
Abstract: Dry root rot of groundnut, a fungal disease more prevalent under rainfed conditions and is capable of causing considerable loss in the yield when left unmanaged. In order to find out an effective input for managing the disease, three organic amendments (neem cake, castor cake and karanj cake) at three different concentrations of their aqueous extracts (5 %, 10 % and 15 %) and six different fungicides with contact, systemic and combination mode of action viz., tebuconazole, difenconazole, mancozeb, carboxin, carbendazim 12 % + mancozeb 63 %, tebuconazole 50 % + trifloxystrobin 25 % were screened for their efficacy against the pathogen at various concentrations in vitro by poisoned food technique. Among the organic amendments tested, karanj cake showed maximum inhibition of pathogen growthi.e., 13.56 per cent and 32.55 per cent at 10 per cent and 15 per cent concentrations respectively and no inhibition at 5 per cent concentration whereas neem and castor cakes did not show any inhibition at all the concentrations tested. Among the fungicides mancozeb (2500, 3000 and 3500ppm), carbendazim 12% + mancozeb 63% WP (2500, 2000 and 1500ppm), tebuconazole 50%+ trifloxystrobin 25% 75 WG (1500, 1000 and 500ppm,) recorded complete inhibition of the pathogen at all the concentrations tested.
Keywords: Groundnut, Dry root rot, Organic amendments, Fungicides, R. bataticola
REFERENCES
Barnett, H.L and Barry, B.H. (1972). Illustrated Genera of Imperfect Fungi. Burgess publishing company, Minnesota.
Bineeta Sen. (2000). Biological control: A success story. Indian Phytopathology, 53: 243 – 249.
Bonanomi, G., Lorito, M., Vinale, F. and Woo, S. L. (2018). Organic amendments, beneficial microbes and soil microbiota: towards a unified framework for disease suppression. Annual Reviews of Phytopathology, 56:1–20.
Lenka, S. and Pun, K. B. (2014). In vitro effect of organic amendments through oilcakes on Rhizoctonia solani Kuhn causing sheath blight disease in rice. Journal of Plant Protection and Environment, 11(2): 88-90.
Lokesh, R., Rakholiya, K. B. and Thesiya, M. R. (2020). Evaluation of different fungicides against Macrophomina phaseolina (Tassi) Goid. causing dry root rot of chickpea (Cicer arietinum L.) in vitro. International Journal of Current Microbiology and Applied Sciences, 9(7): 1-11.
Tayyab, M., Islam, W., Lee, C. G., Pang, Z., Khalil, F., Lin, S., Lin, W. and Zhang, H. (2019). Short-Term Effects of Different Organic Amendments on Soil Fungal Composition. Sustainability, 11(198): 1-13.