Variability and Integrated Management of Spot Blotch of Wheat Caused by Bipolaris sorokiniana (Sacc.) Shoem.
| dc.contributor.advisor | Patil, P.V. | |
| dc.contributor.author | Ashwini, R. | |
| dc.date.accessioned | 2024-07-16T04:17:58Z | |
| dc.date.available | 2024-07-16T04:17:58Z | |
| dc.date.issued | 2017-07 | |
| dc.description.abstract | Laboratory and field experiment were conducted at Department of Plant Pathology, College of Agriculture and Main Agricultural Research Station, Dharwad to study the variability and integrated management of spot blotch of wheat. Roving survey conducted in Dharwad, Belagavi, Gadag, Bagalkote and Vijayapura districts during rabi, 2017-18 indicated low severity of spot blotch disease. Variability study in 14 isolates of B. sorokiniana through morphological and cultural characters, pathogenic ability and SSR markers had showed high distinction. Colony colour ranged from whitish black to black. On the basis of pathogenicity, 14 isolates were grouped into two different pathotypes (P1 and P2). Similarity coefficients were ranged from 0.53 to 0.98 representing less than 53 per cent genetic variability among isolates. Under in vitro studies, captan at 0.3 % (86.29 %), hexaconazole, propiconazole and tebuconazole at 0.025 %, 0.05 %, 0.1 % (100%), hexaconazole 5 % + captan 70 % WP, carboxin 37.5 % + thiram 37.5 % WP and tebuconazole 50 % + trifloxistrobin 25 % WG at 0.05 %, 0.1 %, 0.2 % (100%), multineemore at 1.0 % (54.81 %) recorded maximum inhibition of mycelial growth. Trichoderma harzianum + Pseudomonas fluorescens + Bacillus subtilis (3.3 g each/l) concentration, panchagavya (20 %) inhibited 80.44 and 30.29 per cent spore germination, respectively. In Integrated disease management, among the eight spray schedules evaluated under field condition, two sprays of hexaconazole 5 % EC (0.1 %) with 15 days interval reduced the spot blotch severity by 13.40 per cent with highe st grain yield (13.33 q/ha), biomass (8.33 t/ha) and BC ratio (1:1.94). Hexaconazole 5 % EC (0.1 %) was most effective in managing spot blotch disease. | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810212035 | |
| dc.language.iso | English | |
| dc.pages | 159 | |
| dc.publisher | University of Agricultural Sciences, Dharwad | |
| dc.research.problem | Variability and Integrated Management of Spot Blotch of Wheat Caused by Bipolaris sorokiniana (Sacc.) Shoem. | |
| dc.sub | Plant Pathology | |
| dc.theme | Variability and Integrated Management of Spot Blotch of Wheat Caused by Bipolaris sorokiniana (Sacc.) Shoem. | |
| dc.these.type | M.Sc | |
| dc.title | Variability and Integrated Management of Spot Blotch of Wheat Caused by Bipolaris sorokiniana (Sacc.) Shoem. | |
| dc.type | Thesis |