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

2020 - 20224
Reset filters
Subject: Agricultre × Start date: 2010 × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 4 of 4
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON THE POLLINATOR FAUNA OF POMEGRANATE, Punica granatum L. (Lythraceae)
    (2020-11-12) KOTESH, Y CHAVHAN.; JAGADISH, K S.
    This investigation was carried at the Departments of Apiculture and Horticulture, UAS, Bangalore and farmers field Koramangala, Devanahalli during 2019-20. Flower initiation in pomegranate (var: “Bhagwa”) commenced at 21.11± 1.86 days after bud development. Staminate: hermaphrodite flower ratio was 0.40±0.831, with mean of 20.66±6.12 staminate and 27.53±6.95 hermaphrodite flowers. Staminate and hermaphrodite flowers opened during 0800-1300 and 0800-1400 hours, respectively. Anthers dehisced at 0800-1300 (staminate) and 0900-1200 (hermaphrodite) hours after anthesis. Fruit set was highest in the plants when flowers were kept in unbagged condition (10.7±2.08) compared to the bagged condition (3.85±1.22). Totally 20 insect species were found foraging on the inflorescence of pomegranate and they belonged to three insect orders viz., Hymenoptera (40%), Lepidoptera (55%) and Hemiptera (5%). Shannon- Wiener diversity index (H) values ranged from 0.05-0.23 during different hours of the day, with peak ‘H’ values during 0900- 1100 hrs (0.54-0.52). Berger-Parker dominance index (d) was highest for A. dorsata (d=0.38). A. dorsata, A. cerana, A. florea and T. iridipennis spent upto 11.24±1.31, 12.61±1.29, 16.86±2.08 and 25.73±1.88 sec/staminate flower and 7.94±0.87, 10.30±0.98, 14.55±1.21and 24.13±1.68 sec/hermaphrodite flower, respectively. All four species of honey bees spent maximum foraging time during 1100- 1200 hrs. A. dorsata (5.95±1.00) A. cerana (5.18±0.68), A. florea (4.39±0.67) and T. iridipennis (4.20±0.82) visited more number of staminate flowers as compared to hermaphrodite flowers (4.81±1.06, 4.12±0.84, 3.55±0.38 and 3.44±0.59) respectively. Significantly highest yield and qualitative parameters were recorded in the fruits obtained from open pollinated flowers, followed by pomegranate plants enclosed with A. cerana colony.
  • Thumbnail Image
    ThesisItemOpen Access
    COMPARISON OF POLLINATOR DIVERSITY IN CAPSICUM (Capsicum annuum L.) AND SUNN HEMP (Crotalaria juncea L.) AND IMPACT OF DIFFERENT MODES OF POLLINATION ON FRUIT YIELD PARAMETERS OF CAPSICUM
    (2021-11-19) GANA, P K.; JAGADISH, K S.
    The study was carried at the Departments of Apiculture and Horticulture, UAS, GKVK, Bengaluru during 2020-21. Flower initiation in capsicum (var. Nemalite) commenced at 15.50±0.94 days after bud development. Peak anthesis and anther dehiscence started at around 09:00 hrs. and 11:00 hrs respectively. Pollen was viable for three days. Stigma was receptive for four days. Comparison of pollinator diversity revealed that sunn hemp and capsicum flowers were visited by totally 18 and 6 species of floral visitors, belonging to orders Hymenoptera, Lepidopteran, Dipteran and Thysanoptera, respectively. In sunn hemp and capsicum peak abundance of floral visitors were observed from 09:00 to 13:00 hrs and 10:00 to 11:00 hrs, respectively. Shannon-Wiener diversity index in sunn hemp and capsicum ranged between 0.936 to 2.244 and 0.00 to 1.099, respectively. Berger-Parker dominance index was highest for Megachile spp. (d = 0.207) in sunn hemp and Ischiodon scutellaris (d=0.45) in capsicum. Ischiodon scutellaris and Apis cerana were the common floral visitors for both capsicum and sunn hemp. The time spent for foraging and the number of flowers visited per minute by floral visitors were relatively lesser on capsicum than in sunnhemp. Sunn hemp had comparatively higher pollen quantity and higher TSS content in its nectar, thus attracting greater number of floral visitors than capsicum. Significantly higher fruit yield and qualitative parameters were recorded in the capsicum fruits obtained from hand cross pollinated flowers, followed by capsicum plants enclosed with A. cerana colony, as compared to other modes of pollination.
  • Thumbnail Image
    ThesisItemOpen Access
    INVESTIGATIONS ON MAJOR POLLINATOR PROFILE OF CHIA (Salvia hispanica L.)
    (2022-02-28) CHANDRAMANU, K G R.; SHYLESHA, A N.
    Scientific field investigation aimed to document the insect visitors of Chia (Salvia hispanica L.) flowers was carried out at three different locations viz., crop raised in the experimental plots at ICAR, NBAIR-Attur campus-Bengaluru, Organic farming unit-UASGKVK- Bengaluru and also at the farmer field, Nijayappanadoddi, Ramanagara District during 2021. A total of 107 insect visitors were collected and recorded on chia during flowering season at three different selected locations. The collected insect visitors belonged to 41 different insect species, 24 insect genera, nine insect families and three insect orders. The Hymenopterans were dominant (82%) followed by the Dipterans (14%) and lepidopterans (4%). Among, 41 different insect species, the honeybees, Apis dorsata, Apiscerana and Apis florea were dominant visitors in all the locations. The mitochondrial DNA from the legs of the floral visitors was used for the amplification of the CO-I gene at 530C to identify the specimens using molecular taxonomy. Total 5 species confirmed their identity in the molecular taxonomy. The activity of floral visitors, started from 06:00 hours and ended at 18:00 hours. The peak activity of floral visitors was maximum between 13:00 to 15:00 hours with maximum Shannon-Weiner diversity index of 1.754. Among honeybees, Apis dorsata was the dominant visitor of chia flowers with an 0.986 Berger-Parker dominance index. The alighting patterns were very clear in Apis dorsata with the mirror images of ‘C’ and ‘7’ shapes on flowers compared to Apis cerana with mirror images of ‘C’ shapes. But for Apis florea it was not clear.
  • Thumbnail Image
    ThesisItemOpen Access
    PHYSICO-CHEMICAL AND MELISSOPALYNOLOGICAL STUDIES ON MONOFLORAL HONEY OF Apis mellifera Fab. (HYMENOPTERA: APIDAE)
    (University of Agricultural Sciences, Bangalore, 2021-11-29) NATURE, M. S.; Eswarappa, G.
    The study was carried out at the Departments of Apiculture and Plant Biotechnology, UAS, GKVK, Bengaluru during 2020-21. A total of 20 honey samples, belonged to five monofloral honeys viz., Litchi, Acacia, Sunflower, Mustard and Eucalyptus were collected from 20 different Apis mellifera colonies were investigated. The results of melissopalynological investigation revealed that Litchi chinensis (84 %), Acacia auriculiformis F. (72 %), Helianthus annuus (91 %), Brassica juncea (73 %) and Eucalyptus globulus (87%) were the major pollen types, whereas Brassica sp. (16%), Michelia sp. (28 %), Phyllanthus sp. (9 %), Chrysophyllum sp. (27 %) and Grevillea robusta (13 %) were the minor pollen types. All the monofloral honey were categorized under group-III, since their absolute number of pollen grains were in between 100,000 and 500,000 in 10 g of honey. The physical parameters, such as specific gravity of collected monofloral honey ranged from 1.4523 to 1.4568 followed by refractive index (1.4886-1.4963), moisture content (16.15-19.15 %), electrical conductivity (0.33-0.76 dS/m), pH (3.66-4.33), ash content (0.15-0.25 %), total soluble solids (78.75-81.75 °Brix), total solids (80.85-83.85 %), optical density (0.08-0.38) and pfund values (22.50-77.00 mm). The chemical parameters, such as total reducing sugars (70.18-76.16%), sucrose (0.96-3.26 %), glucose (32.01-39.71 %), fructose (34.72- 38.17 %), HMF (2.12-12.29 mg/kg), diastase activity (8.10-17.48 Schade units), fructose-glucose ratio (0.84-1.10) and acidity 0.07 to 0.17 formic acid per cent. All the physical and chemical parameters of five monofloral honey samples of A. mellifera were within the specified guidelines of AGMARK, FSSAI, Codex and EU standards.