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ThesisItem Open Access Physiological Effect of Fungicides in Soybean [Glycine max (L.) Merrill] During Storage and Seed Treatment(University of Agricultural Science, Dharwad, 2016-09) Biradar, Rajashree; Jirali, D.I.ThesisItem Open Access Influence of Planting Materials, Sowing Dates and Spacing on Seed Yield and Quality of Radish (Raphanus sativus L.)(University of Agricultural Sciences, Dharwad, 2016-06) Kattimani, Asha Kasturinaik; Eshanna M.R.ThesisItem Open Access Effect of Mycorrhization in the Management of Striga in Sugarcane Under Field Conditions(University of Agricultural Science, Dharwad, 2016-09) Manjunatha H.P.; P. Jones NirmalnathThesisItem Open Access Effect of Treated and Untreated Domestic Wastewater and Fertilizer Levels on the Performance of Tomato-Palak Sequence Cropping(University of Agricultural Science, Dharwad, 2016-06) Sutar, Rahul K.; Angadi, S.S.ThesisItem Open Access Genetic Investigations on Heat Adaptive Traits in Bread Wheat by Using Molecular Markers(University of Agricultural Science, Dharwad, 2016-11) Jaya; Biradar, Suma S.ThesisItem Open Access Evaluation and Characterization of Genetically Modified Cotton G. herbaceum Var. Jayadhar for Helicoverpa armigera Resistance(University of Agricultural Science, Dharwad, 2016-11) Mahawar, Sonam; Katageri, I.S.ThesisItem Open Access Marker Aided Introgression of Blast Resistance Genes Pi1, Pi2 and Pi54 Into Intan Rice Variety(University of Agricultural Science, Dharwad, 2016-12) Debnath, Prasenjit; Prashanthi S.K.Rice blast caused by Magnaporthe oryzae is the most devastating fungal disease that causes approximately 80 % yield loss. Use of resistant cultivars is the most effective and economical way to control rice blast disease. “Intan” is a medium slender indica variety, popular with farmers and consumers in Karnataka but highly susceptible to blast disease. BPT5204 NIL-28, 18, 30 introgressed with Pi1, Pi2 and Pi54 which was developed in the Department of Biotechnology, UAS, Dharwad and Tetep, having Pi1 and Pi54 were used as donor parents in the crossing programme to develop F1’s, BC1F1’s and BC2F1’s. Marker assisted backcross breeding approach was adopted to introgress broad spectrum blast resistance genes Pi1, Pi2 and Pi54 independently and pyramided into Intan in 2015 & 2016. Molecular markers genic/linked, flanking and unlinked to target genes were used as foreground, recombinant and background selection markers respectively. Genic marker RM224 for Pi1 gene, tightly linked marker AP5659-5 (0.10 cM) for Pi2 gene, RM206 (0.6 cM) for Pi54 gene showed polymorphism among the parents. These polymorphic markers were employed to confirm target genes in hybrids and backcross population. F1 plants generated from ‘Intan x Tetep’ cross was confirmed for the presence of Pi1 + Pi54 genes and confirmed plants were backcrossed. Further, these F1 plants were challenge inoculated with Magnaporthe oryzae isolates and F1’s showed resistant reaction, confirming the hybridity. Foreground selection was exercised and heterozygous plants with Pi1, Pi54, Pi1 + Pi54 pyramids were identified in BC1F1 generation. Sixty three genome wide markers were subjected for polymorphism and polymorphic markers were employed for background selection. From ‘Intan x BPT5204 NIL-18’ cross, heterozygous plants for Pi2 gene were confirmed in BC2F1 generation and subjected for background selection, in which recurrent parent genome recovery ranged from 57.40 % to 81.48 %.ThesisItem Open Access Studies on Collar Rot of Brinjal Caused by Sclerotium rolfsii Sacc.(University of Agricultural Science, Dharwad, 2016-12) Wahid, S A.; Kamanna, B.C.Brinjal (Solanum melongena L.) is one of the important vegetable crop. Collar rot of brinjal caused by Sclerotium rolfsii Sacc. is serious soil borne disease. A study on this was undertaken at the University of Agricultural Sciences, Dharwad during kharif 2015-16. Survey revealed that disease incidence ranged from 2.33 to 24.25 per cent. Highest mean disease incidence (9.75 %) was recorded in black soil. Dhruva hybrid showed high mean disease incidence of 11.52 per cent. . Significantly highest per cent disease incidence of 59.75 was recorded in plants of 15 days old in pot culture studies to know susceptible stage of brinjal. None of the genotypes were found resistant to collar rot pathogen. Among the six systemic fungicides tested under in vitro difenconazole, tebuconazole, hexaconazole and propiconazole at 0.1 per cent and 0.15 per cent concentrations inhibited cent per cent growth of S. rolfsii. Among the five contact fungicides mancozeb at 0.3 % concentration recorded maximum inhibition (60.25 %) of S. rolfsii followed by captan at 0.3 per cent concentration (55.19 %). Combi-products fungicides viz., thiram 37.5 % + carboxin 37.5 % WP and hexaconazole 4 % + zineb 68 % WP at 0.1, 0.2 and 0.3 per cent concentrations inhibited cent per cent o growth of S. rolfsii. Among six bioagents Trichoderma harzianum recorded maximum inhibition. Among thirteen botanicals, parthenium leaf extract recorded maximum inhibition (64.57 %). Among the different treatment combinations tested under pot conditions the combination of seedling dip with thiram 37.5 % + carboxin 37.5 % WP @ 2 g/l + application of FYM @ 200 g/pot + soil application of Trichoderma harzianum @ 4 g/kg followed by soil drenching with thiram 37.5 % + carboxin 37.5 % WP @ 2 g/l on 0, 15, 30, and 45 days after transplanting recorded the least per cent disease incidence (12.04 %).ThesisItem Open Access Technological Gap in Onion Production in Haveri District(University of Agricultural Science, Dharwad, 2016-06) Korishetti, Deepak S.; Nagaraja, M.V.This study was conducted under University of Agricultural Sciences, Dharwad during 2014-15 in Haveri district of Karnataka state. Random sampling procedure was used to select 150 farmers and data collected through the personal interview method. Majority of onion growers were middle aged, 42.67 per cent of the onion growers studied up to primary school, 38.67 per cent farmers belongs to semi-medium land holding category, 49.33 per cent of respondents had medium level of farming experience, 52 per cent of respondents had medium level of area under onion crop. 57.33 per cent of farmers belonged to high level of economic orientation. Considerable per cent of respondents belonged to medium level of extension contact, mass media participation, innovative proneness and scientific orientation. The study revealed that cent per cent of onion growers adopted the recommended onion cultivation practices of proper harvesting stage followed by 98 per cent of farmers adopted correct sowing time, spacing and seed rate. 43.33 per cent belonged to medium category of technological gap. 98.00 per cent of technological gap was found in application of plant promoters followed by split application of nitrogen fertilizers. Majority of farmers got the market price information from others, 54.00 per cent farmers sold their produce in APMCs, 56.67 per cent farmers sold their produce immediately after harvest, 82.67 per cent of farmers graded the onion based on size. 70.67 per cent of onion growers indicated lack of knowledge of pest control as major production constraint followed by high cost of inputs. 92.67 per cent of farmers expressed that price fluctuation of onion was major marketing constraint followed by mal practice in weighment and lack of storage facility.
