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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: ANU, C. N. × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    BIOSYNTHESIS AND CHARACTERIZATION OF SILVER NANOPARTICLES AND ITS EFFECT ON GROWTH AND DEVELOPMENT OF SELECTED LEPIDOPTERAN INSECTS
    (University of Agricultural Sciences, Bangalore, 2021-12-28) ANU, C. N.; Srinivas Reddy K. M.
    The study on “Biosynthesis and characterization of silver nanoparticles and its effect on growth and development of selected lepidopteran insects” was conducted in the Department of Agricultural Entomology, College of Agriculture, GKVK during 2020. Impact of biosynthesized AgNPs was studied on growth and development of two lepidopterans namely silkworm, Bombyx mori L. and tobacco cutworm, Spodoptera litura F. AgNPs was synthesised using mulberry leaf extract and silver nitrate. The change in color from pale green to brown indicates the formation of biosynthesized AgNPs. Nanoparticles were characterized by UV-Vis, Zetasizer, FTIR, SEM, XRD and AFM. UV-Vis illustrated the presence of AgNPs at 423 nm wavelength. Zetasiser enabled the average size of particles was 13.35 nm. FTIR revealed that alkynes were involved in reducing Ag+ to Ago. XRD spectrum specified the crystalline nature of AgNPs. SEM with EDX visualized spherical shape of biosynthesized AgNPs. Maximum larval mortality of 5.33 per cent (on both 3rd and 5th day of 5th instar) and 4.00 per cent (on 3rd day of 5th instar) were recorded in silkworm treated with AgNPs at 150 ppm during 4th and 5th instar, respectively. Deviation from normal appearance of silkworm gut tissues were observed more significantly at 150 ppm. Maximum larval mortality (8.89 %) in tobacco cutworm was observed on both 24 and 48 hr after treatment. Maximum per cent of larval-pupal intermediates (59.75 %), maximum pupal mortality (69.41 %) and least adult emergence per cent (19.35 %) were recorded in tobacco cutworms treated with 150 ppm AgNPs.