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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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Subject: Agricultural Entomology × Author: ARAVINDA × Start date: 1960 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    ANTIMICROBIAL PEPTIDES AND THEIR ROLE AS SEED PROTECTANTS IN THE HARVESTER ANT Trichomyrmex scabriceps (Mayr) (HYMENOPTERA: FORMICIDAE)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-07-30) ARAVINDA; CHANDRASHEKARA, K.
    A diverse array of resources is utilised by ants for their growth and survival. Ants are predatory, phytophagous, nectariorous, and grainivorous etc. Grainivorous ants are commonly called as “harvester ants”. The seed cleaning and other behaviours of harvester ant T. scabriceps was observed in the laboratory queen less ant nest (Formicarium). The results showed that, they perform self-grooming behaviour more frequently than antennation, followed by seed cleaning by mandibles, wall cleaning, allo-grooming, and abdominal wagging. The role of exocrine glandular secretion of these ants as seed protectant was also evaluated, the results suggest that these ants only mechanically clean the seeds in nest and they may not involve the use of any glandular secretion as antimicrobial seed protectants. Antimicrobial activity of 50 per cent acetonitrile:water extracts of head, thorax, and abdomen of T. Scabriceps was evaluated in vitro, against Gram-positive bacterium Escherichia coli and Gram-negative bacterium Staphylococcus aureus using “spot on lawn method” of bioassay. Among three body parts, head and thorax extracts does not shown any antimicrobial activity against both E. coli and S. aureus. Whereas abdomen extracts showed antimicrobial activity only against E. coli but not against S. aureus. Separation of antimicrobial peptide fractions of abdomen extracts was carried out using RP-HPLC. Among 14 fractions collected, only fraction-1 and fraction-2 showed in vitro antimicrobial activity in “spot on lawn method” bioassay. This study showed that T. scabriceps perform different behaviours in nest ant there may not be any association between antimicrobial peptides in the ants and seed cleaning behaviour.