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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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199822
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Subject: Agricultural Microbiology × End date: 1998 × Start date: 1998 × Type: Thesis ×
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Now showing 1 - 9 of 22
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    ThesisItemOpen Access
    RESPONSE OF MICROPAGATED FICUS AND SUGARCANE TO INOCULATION WITH Glomus mosseae, Bacillus coagulans AND Trichoderma harzianum
    (UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE, 1998) JAYANTHI SRINATH; D J, BAGYARAJ
    Abstract not available
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    ThesisItemOpen Access
    ACTINORRHIZAL INOCULATION OF Casuarina equisetifolia L. SEEDLINGS FOR THE GROWTH IMPROVEMENT OF ROSEWOOD (Dalbergia latifolia Roxb.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE, 1998) K T, ROYACHAN; J, RAJ
    Abstract not available
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    ThesisItemOpen Access
    STUDY ON EFFECT OF AZOTOBACTER ON GROWTH AND YIELD OF RADISH {Raphanus sativus L.) AND KNOL-KHOL (Brassica caulorapa L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES, BANGALORE, 1998) O, BASAVARAJU; A R, MADHAV RAO
    Abstract not available
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    ThesisItemOpen Access
    STUDIES ON MICROBIAL DIVERSITY AND THEIR ACTIVITY IN SOIL UNDER BAMBOO PLANTATION
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK ,BANGALORE, 1998-08-19) MAHESH KUMAR, K. S.; AIagawadi, Dr.A.R.
    Investigations were carriedout on the rhizosphere microflora of bamboo as well as their population and activities under leaf litter of bamboo plantation during different seasons. The enumeration of microflora in the rhizosphere of different species of bamboo grown at different locations indicated that Dendrocalainus harboured maximum number of total bacteria and N2-fixers whereas Bambusa arundinaceae recorded highest number of P-solubilizers and Bambusa recorded highest population of fungi and actinomycetes. Bamboo plants grown in medium black soil showed higher population of different groups of microorganisms than those grown in red soils. Out of 32 representative major bacterial isolates obtained from bamboo rhizosphere, 16 were found to be N^-fixers, six were P-solubilizers and 10 were predominant general bacterial isolates. The N,-fixers mainly belonged to the genera Azotobacter Azospirillum. The P-solubilizers belonged to Pseudomonas, Xanthomonas and Erwinia. Predominant bacterial isolates belonged to Bacillus, Erwinia, Pseudomonas and Xanthomonas. Among N2-fixers, Azospirillum isolates were found to fix higher amount of nitrogen than Azotobacter isolates. In case of P-solubilizers, strains PSER-1 and PSER-2 showed maximum solubilization of tricalcium phosphate with maximum reduction in pH of the broth. All N2-fixers and P-solubilizers were found to produce lAA and GA. Inoculation of bamboo seeds with selected efficient nitrogen fixers or P-solubilizers either individually or in combination showed increased growth of bamboo seedlings. In general single inoculation treatments gave better results than combined inoculations. All the inoculation treatments enhanced the seed germination root and shoot length as well as dry matter accumulation of bamboo seedlings. The microbial load and enzyme activities in soil under leaf litter of bamboo were significantly higher than that of control soil (unplanted soil). Among the bamboo plant densities, the soil under highest plant density showed maximum population of bacteria, fungi, actinomycetes, N2-fixers, P-solubilizers and cellulose degraders, as well as dehydrogenase, urease and phosphatase activities.
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    ThesisItemOpen Access
    INFLUENCE OF VA MYCORRHIZAL FUNGI, AND NITROGEN FIXING AND MYCORRHIZATION HELPER BACTERIA ON GROWTH OF NEEM (Azadirachta indica A. Juss.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK ,BANGALORE, 1998-12-19) SUMANA, D. A.; BAGYARAJ, D.J.
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    ThesisItemOpen Access
    POST - HARVEST PRESERVATION OF MANGO AND GUAVA AGAINST SPOILAGE MICROORGANISMS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK ,BANGALORE, 1998-08-19) BHAT, ARATI; KULKARNI, J.H.
    A study was conducted on the post harvest spoilage and their control by biocides in mango and guava. The in vitro effect of Sanosil and two check chemicals viz. Carbendazim and Mancozeb on spore germination, mycelial weight and hyphal growth of spoilage fungi was studied. Three spoilage fungi namely Pestalotiopsis mangiferae stey. and Aspergillus fumigatus Fresenius, Rhizopus stolonifer Lind. were isolated from spoiled mango and guava respectively. Fruits collected from market had higher microflora than those collected directly from the orchard. The minimum inhibitory concentration of three biocides against spore germination of Pestalotiopsis mangiferae was 1,000 ppm in Carbendazim and 5,000 ppm in Sanosil and Mancozeb, whereas in Aspergillus fumigatus application of Carbendazim. Sanosil and Mancozeb at 1,000 ppm in each case completely inhibited spore germination. However, in Rhizopus stolonifer \he spore germination was completely inhibited in Carbendazim and Mancozeb at 1,000 ppm and in Sanosil at 5,000 ppm. Mycelial weight and hyphal growth were also controlled by all the three biocides at higher concentrations, but the growth was not checked completely. In vivo studies the effect of biocides on shelf life and post harvest qualities of fruits were maintained for longer period and spoilage was reduced significantly. Carbendazim (500 ppm) and Sanosil (10,000 ppm) dipped fruits maintained low TSS, reducing sugar, PME and high ascorbic acid content compared to untreated fruits. In cold storage there was no spoilage upto 10 days in mango and treatment with Carbendazim (500 ppm), Sanosil (10,000 ppm) and Mancozeb (1,000 ppm) could extent shelf life upto 20 days. The TSS, reducing sugar and PME were low In treatment with Carbendazim 500 ppm and Sanosil 10,000 ppm. But ascorbic acid content and titrable acidity were high compared to all other treatments. Hence, Carbendazim (500 ppm) and Sanosil 10,000 ppm treated fruits for five minutes maintained high post harvest quality and low spoilage.
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    ThesisItemOpen Access
    STUDIES ON INDUCTION OF SPORULATION IN Azolla filiculoides AND ITS APPLICATION IN INOCULUM PRODUCTION
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 1998-08-03) KOSHY, BINU; Shivaprakdsh, Dr. M.K.
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    ThesisItemOpen Access
    STUDIES ON POST-HARVEST PRESERVATION OF TOMATO AND BEANS AGAINST SPOILAGE MICROORGANISMS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 1998-08-19) RAGHAVENDRA RAO, B.; ALAGAWADI, A.R.
    Post-harvest spoilage of tomato and beans and their chemical control were studied by considering the spoilage susceptibility of these two vegetables. The microbial analysis of the healthy tomato and beans samples from field and market during three different months, representing three different seasons, showed higher microbial load in samples collected from market compared to ones collected from field. The two vegetables sampled during August showed higher fungal load whereas those collected during March showed higher bacterial load. Out of 17 isolates obtained from tomato and beans six fungal species belonging to the genera Fusarium, Aspergillus, Alteniaria, Cladosporium, one yeast (Hansenula) and a bacterium (Pseudomonas) caused spoilage of tomato and a lone funeral isolato, Malualela aeria, caused spoilage of beans and is a new record on beans. The ill vitro evaluation of three biocides indicated that Carbendazim was most effective followed by Mancozeb and Sanosil in inhibiting all spoilage fungi isolated from tomato and beans except Alternaria alternata on which Mancozeb was most effective. However, Carbendazim and Miiacozob were not effective ajjainst Pseudomonas whereas Sanosil was most efficient on thin bacterium. The in vivo studies on effect of biocides on shelf-life and post-harvest qualities of tomato and beans indicated that Carbendazim 500 ppm and Sanosil 10000 ppm were most effective in extending the shelf-life and maintenance of post-harvest qualities. These two treatments showed lowest spoilage percentage, reducing sugar content, pectin methyl esterase activity and cellulase activity but recorded highest ascorbic acid content. The dipping time of five minutes showed higher shclf-life and maintenance of above said post-harvest qualities in both tomato and beans compared to one and two minutes dipping. Storage of the two vegetables in cold storage (6" C) further improved the shelf-life and post-harvest qualities.
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    ThesisItemOpen Access
    SEED BORNE NATURE OF AZOTOBACTER CHROOCOCCUM IN CHILLI {CAPSICUM ANNUUM L.) AND ITS ROLE IN PLANT GROWTH
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 1998-08-19) SHARMA, JAYALAKSHMI S.; ALAGAWADI, A.R.
    Investigations were carried out on seed borne nature of Azotobacter in chilli and their role in plant growth at the Department of Agril. Microbiology, University of Agricultural Sciences, Dharwad. Azotobacter sp were isolated from both surfacesterilized and unsterilized seeds of 14 varieties of chilli at different stages of fruit maturity. The occurrence of Azotobacter in surface sterilized seeds was lower than that of unsterile seeds. The representative isolates were identified as A. chroococcum. A significant difference in percent seeds yielding Azotobacter was observed between the varieties. Among the varieties, Lathigolar and NP31 harboured highest and lowest population of Azotobacter respectively. The two varieties also had respectively highest and lowest ascorbic acid content. Ascorbic acid was found to stimulate the growth and nitrogen fixation by seed isolates. The competitive survival ability of seed borne Azotobacter in soil was poor as compared to soil isolates. Interaction studies of seed borne Azotobacter isolates with soil bacteria indicated that all the isolates were inhibited by Pseudomonas sp but were stimulated by Bacillus subtilis is. However, Serratia marcescens stimulated nine and inhibited two i solates. The presence of seed borne Azotobacter in different plant parts of aseptically grown chilli seedlings was also detected and their movement from Seed to other plant parts was confirmed by inoculating antibiotic resistant marker strains to surface sterilized seeds and reisolating them from different parts of aseptically grown chilli seedlings on antibiotic containing medium. Pesticides like dimethoate and methyl parathion inhibited the growth of seed isolates at higher concentration but phosphomidon had no inhibitory effect. Seed borne Azotobacter isolates were found to produce lAA, GA and several amino acids, besides fixing atmospheric nitrogen. Inoculation with these strains increased the seed germination, root and shoot length and total dry matter content of chilli plants significantly in both sterilized and unsterile soil .