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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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2000 - 200975
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Subject: Plant Pathology × End date: 2009 × Start date: 2000 × Thesis Type: Ph.D ×
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Now showing 1 - 9 of 75
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    ThesisItemOpen Access
    BIOLOGY AND ECOLOGY OF Ralstonia solanacearum (Smith) Yabochi et aL CAUSING BACTERIAL WILT OF POTATO AND ITS INTEGRATED MANAGEMENT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2000-08-05) VENKATESH; NAZIR AHMED KHAN, A.
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    ThesisItemOpen Access
    EPIDEMIOLOGY AND MANAGEMENT OF ALTERNARIA LEAF BLIGHT AND RUST OF SUNFLOWER (Helianthus annuus L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-04) AMARESH, Y. S.; NARGUND, V. B.
    Alternaria leaf blight caused by Altemaria helianthi and rust caused by Puccinia helianthi are two major foliar diseases of sunflower. The yield loss due to Alternaria leaf blight and rust was estimated to be 43.90 and 32.65 per cent during 1998-99 and 1999-2000 respectively. AUDPC value was found to be a better parameter for yield loss assessment and epidemiological model was developed. Autoregressive method of seventh order was used for estimating both uredospore and condial load interms of previous successive seven days. The disease development was predicted by first order autoregressive model and logistic model. The toxin produced by A.helianthi was purified and identified as 3 propyl 4 hydroj^ -2oxy -2-3 dihydro furone. The toxin produced typical brown necrotic spots without yellow halo on susceptible sunflower cv. Morden. PAC-36, PAC-304 and DSH-34 were identified as slow blighters and PAC-36, PAC-304 GK-2002 and GAUSUF-15 as slow rusters. Sugars and phenols were more in diseased leaves than healthy leaves. The isozyme studies on catalase, peroxidase and polyphenol oxidase revealed their role in disease development. The higher incidence of Alternaria leaf blight and rust was noticed in kharif and rabi sown crop respectively. Among 30 plants screened, Allium sativum, A.cepa, Amamthus viridis, Ocimum sanctum, Tridax procumbens, and Melia azedarach were found effective against both pathogens. Chlorothalonil, mancozeb, propiconazole and hexaconazole were most effective against both the pathogens. Pseudomonas fluorescens was found to be a better bioagent in the management of both diseases. Among 140 sunflower genotype AGO.No.405, 1583, PAC-36 and PAC-336 were found resistant to both Alternaria leaf blight and rust. In integrated disease management of Alternaria leaf blight the treatment fungicide followed by Pongamia and P. fluorescenss was found to be effective in reducing the disease.
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    ThesisItemOpen Access
    EPIDEMIOLOGY AND MANAGEMENT OF LEAF BLIGHT OF WHEAT CAUSED BY Exserohilum hawaiiensis (BUGNICOURT) SUBRAM. AND JAIN, Ex. M. B. ELLIS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-04) SHAMRAO PAUL, VASANT; KULKARNI, SRIKANT
    The leaf blight of wheat caused by Exserohilum hawaiiensis is one of import£int diseases of wheat. The survey revealed maximum disease incidence in Raibag, Gokak, Athani and Dharwad taluks in Kamataka and Mahabaleshwar, Pune, Karad, Niphad taluks in Maharashtra. The loss assessment study indicated reduction in thousand grain weight (18.12%), grain yield (31.30%), height of plants (7.05%) and biomass (19.17%). Crop loss model using input variable PDI was of the farm y = -32.33+1.16 (PDl). The pathogen survived only for few weeks in soil, as it was highly aerobic. The pathogen survived under laboratory conditions for 21 months, 15 months under natural conditions, 27 months under refrigerated conditions and remained viable in seed for 28 months. The pathogen could infect Chloris barbata, Dectyloctenium aegypticum, Eleusine coracana, Oryza sativa. Sorghum bicolor and Zea mays. The perfect state of the pathogen could not be detected. The spore load of E. hawaiiensis showed fluctuations over time fr-om 2.38 to 8.08 per microscopic field per day. Eight isolates obtained from field of different localities. The variability among hyphal tip isolates was assessed on the basis of morphological, cultural, physiological, nutritional and pathogenicity characters. The isolates were classified into four groups such as Group-!: E, F, G, Group-Il: B and C, Group-Ill: D and H, Group-IV: A based on their cultural characters. On the basis of pathogenicity, isolates were classified into three group as highly virulent (Mahabaleshwar and Ugar Khurd), Moderately virulent (Arabhavi, Dharwad and Sangankeri) and least virulent (Kannur, Digraj ^d Pune). Seed treatment with captan or mancozeb or combination of either of them with Trichoderma viride recorded cent per cent control of primary seed home inoculum. Among the fungicides, propiconazole was found effective. The plant extracts viz.. Eucalyptus globus, Lantana camara, Flacourtia ramontchi, Acacia concina, Memecylon edule and Magnifera indica were found effective against E. hawaiiensis.
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    ThesisItemOpen Access
    STUDIES ON VARIATION AND MANAGEMENT OF FUSARIUM WILT OF PIGEON PEA [Cajanus cajan (L.) Millsp.]
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2000-11-09) MADHUKESHWARA, S.S.; SHESHADRI, V.S.
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    ThesisItemOpen Access
    BIOLOGICAL CONTROL OF CHARCOAL ROT OF SORGHUM {Sorghum bicolor (L .) Moench] CAUSED BY Macrophominaphaseolina (Tassi) Goid.
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-04) DESAI, SUNIL A.; Kulkarni, Srikant
    Biological control of charcoal rot of sorghum caused by Macrophomina phaseolina was undertaken utilizing 26 native and 12 commercial isolates of antagonists. Native isolates of Pseudomonas fiuorescens, Trichoderma harzianum, T. vindo and Gliocladium virons exhibited high antagonistic potential. Talc formulation, wheat bran : saw dust : tap water, papaya ripe fruit, farm yard manure, coffee berry skin, gobar gas slurry, mushroom spent bed, pigeonpea husk, press mud and dung were superior substrates for mass multiplication of test antagonists. Ammonium sulphate and diammonium phosphate additives enhanced multiplication. Pseudomonas fiuorescens grew well on dung. Combined application of P. fiuorescens with species of Trichoderma and Giiociadium as seed treatment @ 4 g per kg and soil application (150 kg/ha) method was most effective to reduce charcoal rot. Soybean, wheat, tagase, pigeonpea and sorghum seeds supported quick multiplication of test antagonists. Storage temperature of 15°C was congenial for prolonged shelf life and milky white polythene bags enahanced population of antagonists. Sclerotial germination and disintegration was higher in coconut and sesamum oil cake extracts respectively. Sclerotia remained viable upto 36 months. Extracts of garlic clove, camphor, leaf extracts of bitter gourd, pongamia, amaranthus, periwinkle, ashoka, mosambi, lakki, and oils of eucalyptus, tuisi and karanj wore inhibitory to pathogen, Ncom flower extract was inhibitory to pathogen and stimulatory to test antagonists. Triazoles were lethal whereas metalaxyl and carbofuran exhibited mycotonic effect to test antagonists at lower concentration. Integration of antagonists with biofertilizers was confirmed. Carbendazim, thiram, urea, chlorpyriphos, glyphosate, alachlor, trifluralin were inhibitory to fungal antagonists and pathogen. Copper ore tailings and fly ash were safer to antagonists. Non fungicides recorded fungistatic inhibition. DSV-4 recorded charcoal rot resistance. Integrated management of sorghum charcoal rot disease was achieved through combined application of native isolates of antagonists resulting in 13.56 per cent increased thousand grain weight.
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    ThesisItemOpen Access
    STUDIES ON TOMATO LEAF CURL GEMINIVIRUS AND Bemisia (abaci (Gennadius); MOLECULAR DETECTION, FARMERS PERCEPTION AND SUSTAINABLE MANAGEMENT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2000-08-23) VENKATESH, H.M; MUNIYAPPA, V.
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    ThesisItemOpen Access
    INTEGRATED MANAGEMENT OF PHYTOPHTHORA FOOT ROT OF BLACK PEPPER THROUGH VA MYCORRHIZA AND HOST PLANT RESISTANCE
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-04) LOKESH, M. S.; Anahosur, K. H .
    The black pepper vines of both cultivated and vines in the forest areas are invariably associated with the native isolates of VA mycorrhiza viz., Glomus fascicuiatum and Acaulospora sp. The native isolates VA mycorrhiza were effective in combating the Phytophthora foot rot of black pepper alone and its effects is synergestic when integrated with either Trichoderma viride or potassium phosphonate (Akomin, @ 0.3 per cent). The cuttings of black pepper viz., Vokkalu , Mottakare, Thirupukare showed least incidence of disease when the cuttings were preinoculated with native isolates of VA mycorrhiza then challenged with Phytophthora capsici. Vokkalu type 1 and 2, Uddakare accession 1 and 2, Thirupukare, Balankotta - II, Neelamundi-ll, Narayakodi-IV and Kudargutta showed tolerance to P. capsici at lower inoculum potential i.e., 25 zoospores/vine. The explant initiated the callus in presence of 0.5 mg I BA in combination with either 1.0 mg I 2,4-D or 2.0 mg I NAA or IBA or lAA whereas, the callus could be easily maintained in half strength MS medium supplemented with 1.0 mg I 2,4-D. Callus of cultivars viz.. Vokkalu type-1 and 2 are having slight tolerance at one per cent toxic metabolites of Phytophthora capsici. The shoot tip explant of Uddakare and Thirupukare produced multiple shoots in half strength MS medium with 2.0 mg I BA and 0.01 mg I NAA. NAA (1.0 mg I and IBA (1.0 mg I -1) were found effective in rooting of the shoot. Micro propagated plantlets of black pepper were hardened by planting in 1:1 sand and coir pith in humid chamber for 30 days.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    HOST P1H:FE1H:NCE of Uemisia (abaci (Geimadius) AND MANAGEMENT OF TOMATO LEAF CURI. VIRUS DISEASE
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-12-27) GANESHA NAIK, R.; Muniyappa, V.