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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: Sericulture × Author: LATHA, S. × End date: 2009 × Start date: 2009 ×
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    ThesisItemOpen Access
    EFFECT OF BIOCHEMICAL CONSTITUENTS (SELECTED) OF MEDICINAL PLANTS ON SILKWORM REARING AND BmNPV MANAGEMENT
    (University of Agricultural Sciences, Bangalore, 2009-07-15) LATHA, S.; BHASKAR, R. N.
    The study on the “Effect of biochemical constituents (selected) of medicinal plants on silkworm rearing and BmNPV management” was undertaken in the Department of Sericulture UAS, GKVK, Bangalore-65. Aqueous extracts of different medicinal plants viz., Adathoda vasica, Bougainvillea spectabilis, Phyllanthus niruri, Terminalia arjuna and Pongamia glabra administered to silkworm through mulberry leaves once during fourth and fifth instar larvae of PMxCSR2 revealed positive response to the botanical treatments. However, there was an increase in mature larval weight from 26.31 to 27.85 and 26.46 to 28.68g/10 and silk productivity (3.34 to 4.23 and 3.52 to 4.60cg/day) which were recorded for P. glabra and P. niruri administered batches respectively and reduced total larval mortality (20 to 9 and 15 to 7%) over the control (25 to 21%). The trend was same even on cocoon parameters of both the instars. The fourth and fifth instar experimented batch administered with different hours of medicinal botanical treatment BmNPV polyhedra revealed antiviral action. This is due to antiviral property of total phenols and tannins present in aqueous extracts of A. vasica, B. spectabilis, P. niruri, T. arjuna and P. glabra. Among four hours of treatment (0,3,5 and 7h), 7 hour of treatment to BmNPV showed increase in larval weight (24.65g/10), reduced fifth instar and total larval duration (9.14 and 30.64days), increased ET50 for symptom expression and ET50 for mortality (4.49 and 9.79 days), reduced total mortality (8.50%), higher ERR (91.50%) and all the cocoon parameters in P. niruri treated lots of fourth instar silkworms followed by B. spectabilis, T. arjuna, A. vasica and P. glabra. The trend was same, even in fifth instar treated batches. It is further confirmed that, presence of above biomolecules might have act as viral inhibitors in avoiding infection by BmNPV as well as enhancing silk yield and quality.