Thumbnail Image

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.

Browse

20203
Reset filters
Subject: Plant Physiology × End date: 2025 × Start date: 2020 × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON Fusarium WILT IN SCENTED GERANIUM [Pelargonium graveolens (L.) Herit]
    (University of Agricultural Sciences, Bangalore, 2020-12-30) ARUNKUMAR; Shreenivasa, K. R.
    Scented geranium is an important, perennial aromatic herb affected by several diseases of which wilt caused by Fusarium oxysporum is becoming a major constraint in production. Wilt symptoms such as yellowing, drooping of plants and vascular discolouration were observed in the infected stems. Maximum wilt incidence recorded in Tumakuru district (36.73 %). The wilt causing pathogen was isolated from infected plant samples collected from different geranium growing areas of southern Karnataka and pathogenicity was proved under greenhouse conditions. The re-isolated pathogen was identified as F. oxysporum based on its morphological characters by comparing with standard descriptions of Fusarium species and also confirmed the pathogen through molecular characterization of isolates by using universal fungal ITS-1 and ITS-4 primers. Sabouraud's dextrose agar (SDA) and corn meal agar (CMA) were found to be ideal for radial mycelial growth and sporulation. The maximum growth and sporulation of the pathogen was found at temperature 25 ˚C and pH of 6.5. Among the botanicals and bio agents evaluated under in vitro condition against F. oxysporum, agave (59.31 %), Trichoderma viride Tv- 8 (71.12 %), Bacillus pumilis (54.66 %) and B. velezensis Bv-P42 (53.61 %) were effective in inhibition of mycelial growth of the pathogen. Among the fungicides evaluated, systemic fungicides carbendazim and propiconazole shower 100.00 per cent, combi products hexaconazole + captan 84.51 per cent and contact fungicide copper oxychloride 56.48 per cent were effective as evidenced by maximum mycelial growth inhibition compared to other fungicides under in vitro condition.
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON Helminthosporium LEAF BLIGHT OF BROWNTOP MILLET [Brachiaria ramosa (L.) Stapf]
    (University of Agricultural Sciences, Bangalore, 2020-12-31) GUTHA VENKATA RAMESH; PALANNA, K. B.
    Browntop millet was recently introduced into millet system in India for domestic purpose. In Kharif 2018, leaf blight was observed at Bangalore, India. Spots were brownin colour with small yellow halo eventually enlarged with light brown centre. Spots coalesce causing blight. Maximum disease severity was recorded in Bengaluru (8.46 G) and minimum in Mandya (4.80 G). Morphologically the pathogen was identified as Bipolaris sp. by comparing with standard descriptions of Helminthosporium species. BTMH5 isolate was identified as more virulent. Pathogen was able to infect only browntop millet. Czapek Dox agar (CDA) and host leaf decoction agar with 2 per cent sucrose and pH 6.0 to pH 7.0 were found to be ideal for radial mycelial growth and sporulation. In vegetative compatibility, BTMH2 × BTMH6 showed compatibile reaction where H-shaped hyphal anastomosis was observed. Barren pseudothecia are produced on Sach’s agar medium. BLAST results of GPDH sequences confirmed that Bipolaris setariae as the causal organism of browntop millet leaf blight in India. Specific primers were designed and validated. Among the botanicals, maximum per cent inhibition was noticed in agave with no inhibition in calotropis. Trichoderma viride along with T.harzianum strain 14 among the fungal bio agents and P42 strain of Bacillus velezensis among the bacterial bio agents accounted maximum per cent inhibition. Mancozeb (96.54 %) among the contact fungicides, propiconazole (100.00 %) among the systemic fungicides and cymoxanil + mancozeb among the combi-product fungicides exhibited maximum inhibition of mycelial growth. Amongst the 40 germplasm screened, none of the germplasm showed resistant reaction.
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON Fusarium WILT IN SCENTED GERANIUM [Pelargonium graveolens (L.) Herit]
    (University of Agricultural Sciences, Bangalore, 2020-11-20) ARUNKUMAR; ARUNKUMAR; Shreenivasa, K. R.; Shreenivasa, K. R.
    Scented geranium is an important, perennial aromatic herb affected by several diseases of which wilt caused by Fusarium oxysporum is becoming a major constraint in production. Wilt symptoms such as yellowing, drooping of plants and vascular discolouration were observed in the infected stems. Maximum wilt incidence recorded in Tumakuru district (36.73 %). The wilt causing pathogen was isolated from infected plant samples collected from different geranium growing areas of southern Karnataka and pathogenicity was proved under greenhouse conditions. The re-isolated pathogen was identified as F. oxysporum based on its morphological characters by comparing with standard descriptions of Fusarium species and also confirmed the pathogen through molecular characterization of isolates by using universal fungal ITS-1 and ITS-4 primers. Sabouraud's dextrose agar (SDA) and corn meal agar (CMA) were found to be ideal for radial mycelial growth and sporulation. The maximum growth and sporulation of the pathogen was found at temperature 25 ˚C and pH of 6.5. Among the botanicals and bio agents evaluated under in vitro condition against F. oxysporum, agave (59.31 %), Trichoderma viride Tv- 8 (71.12 %), Bacillus pumilis (54.66 %) and B. velezensis Bv-P42 (53.61 %) were effective in inhibition of mycelial growth of the pathogen. Among the fungicides evaluated, systemic fungicides carbendazim and propiconazole shower 100.00 per cent, combi products hexaconazole + captan 84.51 per cent and contact fungicide copper oxychloride 56.48 per cent were effective as evidenced by maximum mycelia growth inhibition compared to other fungicides under in vitro condition