Int.J.Curr.Microbiol.App.Sci (2021) 10(01): 3339-3346 3339 Original Research Article https://doi.org/10.20546/ijcmas.2021.1001.392 Invivo Management of Spot Blotch (Bipolaris sorokiniana) of Wheat (Triticum aestivum L.), using Bio-Agent and Fungicides Shiv Shankar Patel 1* , Shiv Pratap Singh, Sandeep Kumar, Ashwani Kumar Patel and Digvijay Singh Department of Plant Pathology, Narendra Dev University of Agriculture & Technology, Kumarganj, Faizabad, India *Corresponding author ABSTRACT Introduction In India, wheat (Triticum aestivum L.) considered as the most important cereal crop after rice, grown on about an area of (30.90 million hectare), production of (97.44 million tons), and productivity of 3172.24 kg ha -1 and covering 12 percent of world production (DES, MoA & FW, India, 2016-2017). It is also recognized as a world’s major cereal crop and staple food of many regions which grown under both irrigated and rainfed conditions. The crop belongs to family Poaceae or Graminiae (Yadawad et al., 2015), at present, three species, namely T. aestivum L. (Bread wheat), T. durum Desf. (Macroni or Durum wheat) and T. dicoccum Schrank. (Emmer wheat), are commonly cultivated. However, the crop has been affected by a number of devastating diseases caused by many fungi, International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 10 Number 01 (2021) Journal homepage: http://www.ijcmas.com Wheat (Triticum aestivum L.) is a one of the most important cereal crop after rice in the India which have suffers from a no. of devastating diseases caused by the many fungi, bacteria and viruses. Among the fungal diseases spot blotch ( Bipolaris sorokiniana) is a most vital disease of wheat in Northern Eastern Plain Zone of India (NEPZ). The disease has causes considerable grain yield loss of the crop ranging from 18-22 percent. The field experiment was done with eleven different treatments including check with combinations of five different fungicides i.e. Propiconazole 25% EC, Folicure (Tebuconazole 25 % EC), Hexaconazole 5% EC, Nativo 75 WG (Tebuconazole 50 % + Trifloxystrobin 25 %) used as foliar spray. However, the fungicide Vitavax Power 75 WP and one bio-agent Pseudomonas fluorescence used as seed treatment for the management of the disease in the year 2017-18. The percent disease incidence (PDI) indicates that T 7 (seed treatment with Vitavax Power 75WP @ 2.5g/kg seed with two foliar spray of Propiconazole 25% EC @ 0.1 % one at boot leaf stage and second after 20 days after first spray) reduced the disease incidence (32.96%). The 1000 grain weight, yield q/ha, avoidable yield loss and percent increase in yield were also highest in the aforesaid treatment (41.52g, 38.58q/ha, 19.31% and23.93%) respectively, as comparison to other treatment combinations. Keywords Bipolaris sorokiniana, Spot blotch, Percent disease incidence, Pseudomonas fluorescence, fungicides, Bio- agent Accepted: 20 December 2020 Available Online: 10 January 2021 Article Info