Pooja Yadav*, J.R. Verma1 and Dama Ram1
Department of Plant Pathology, CoA, Jodhpur (Agriculture University, Jodhpur, Rajasthan – 342304
1 Department of Plant Pathology, ARS, Mandor (AU, Jodhpur), Rajasthan – 342304
Email: py139501@gmail.com
Received-26.08.2021, Revised-08.09.2021, Accepted-19.09.2021
Abstract: Alternaria leaf blight (Alternaria alternata) is considerable damage to carrot crop on aerial part of the plant. The efficacy of six plant extracts and four bio- agents were evaluated against the A. alternata incite carrot leaf blight under in vitro condition. Extract of garlic (Allium sativum) (clover), and neem (Azadirachta indica) (leaf) were effectively inhibit the growth of pathogen, at two different concentrations viz. 5% and 10% along with control. Among the botanicals, the garlic cloves extract was observed to be all most effective resulting in 68.33% & 80% inhibiting the mycelial growth followed by Neem leaf extract resulting in 60.44% & 73.98% inhibiting the mycelial growth, at 5% and 10% concentration, respectively. Bio control agent i.e. Trichoderma viride and Trichoderma harzianum which in vitro evaluated could suppress the growth of pathogen. Among the all bio- inoculants Trichoderma viride was recorded superior in 77.13% mycelial growth inhibition followed by Trichoderma harzianum was recorded in 70.41% mycelial growth inhibition.
Keywords: Plant extracts, bio-inoculants, carrot, in vitro
References
Bochalya, M.S., Shekhawat, K.S., Singh, R. and Chohan, P.K. (2012). Management of Alternaria fruit rot of brinjal under in vitro conditions. Biopesticides International, 8(2): 131-137.
Bose, T. and Som, M. (1990). Vegetables crops in India, Good Association printers, Culcutta, pp. 148-150 p.
Chand, G. and Singh, V.K. (2011). Eco-friendly management of Alternaria blight of carrot (Daucus carota L.). Journal of Hill Agriculture, 2(2): 201-203.
Denis, C. and Webster, J. (1971). Antagonistic properties of species group of Trichoderma. Transactions of the British Mycological Society, 57: 25-39.
Jadeja, K.B. and Pipliya, B.H. (2008). In vitro evaluation of plant extracts and bio agents against Alternaria burnsii Uppal, Patel & Kamat causing blight of cumin (Cuminum cyminum L.). Journal of Spices and Aromatic Crops, 17(1): 26-28.
Jakatimath, S.P., Mesta, R.K., Biradar, I.B., Mushrif, S.K. and Ajjappalavar, P.S. (2017). In vitro evaluation of fungicides, botanicals and bio-agents against Alternaria alternata causal agent of fruit rot of brinjal. International Journal of Current Microbiology and Appied. Science, 6(5): 495-504.
Nene, Y.L. and Thapliyal, P.L. (1979). Fungicides in plant disease control. Oxford and IBH Publishing Co. Pvt. Ltd. New Delhi. pp. 413-414.
Panchal, D.G. and Patil, R.K. (2009). Eco-friendly management of fruit rot of tomato caused by Alternaria alternata. Journal of Mycology and Plant Pathology, 39(1): 66-69.
Ravishankar, L.V. and Tiwari, S. (2018). Biological management of Alternaria leaf blight in coriander (Coriandrum sativum). Journal of Pharmacognosy and Phytochemistry, 7(6): 1867-1869.
Richardson, M.J. (1990). An Annotated list of seed borne diseases, International Seed testing Association, Zurich, Switzerland, pp. 28.
Strandberg, J.O. (1992). Alternaria species that attack vegetable crops: Biology and options for disease management. In: Alternaria: Biology, plant disease and metabolites. (Cielkowski, J. and Viscontia A. eds). Amsterdam: Elsievier Science Pub. pp. 367-398.
Thaware, D. S., Fugro, P. A., Jadhav, Y. T., Magar, S. V. and Karande, R. A. (2010). In vitro evaluation of different fungicides, plant extracts and bio-agents against Alternaria alternata (Fr.) Keissler causing leaf blight of cowpea. International Journal of Plant Protection, 3(2), 356-360.
Tulek, S. and Dolar, F.S. (2015). Detection and identification of Alternaria Species causing diseases of carrot in ankara province, Turkey. Scientific Papers. Series B, Horticulture, 59: 263-268.
Vincent, J.M. (1947). Distortion of fungal sac hypae in the presence of certain inhibitors. Nature, 159-850.
Yawalker, K.S. (1985). Vegetable crops in India, Agri-Horticultural Publishing House. Bajaj Nagar-440010.