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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: Plant Pathology × Author: AKSHATHA, M × Start date: 2019 × Type: Thesis × Thesis Type: M.Sc ×
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    STUDIES ON EARLY BLIGHT OF TOMATO CAUSED BY Alternaria solani (ELLIS AND MARTIN) JONES AND GROUT
    (University of Agricultural Sciences, Bangalore, 2022-12-20) AKSHATHA, M; MAHESH, M
    Early blight of tomato caused by Alternaria solani is an important disease causing considerable yield loss. The leaves showing typical target board spot with yellow hallow were used to isolate the pathogen by using standard tissue isolation method. A. solani produced muriform conidia that were born singly and had a long beak and Koch’s postulate was proved. The pathogen was further confirmed as A. solani by molecular characterization using ITS primers. The highest colony growth of 82.10 mm was found on V8 juice agar medium and the colony colour varied from light brown to dark brown with completely serrated to smooth margin. The temperature (25oC) and pH (7.00) were found best for growth of the pathogen. Three different solanaceous vegetables viz., potato, brinjal and chilli were found to be collateral host for the early blight of tomato. Among different fungicides, bioagents and botanicals tested under laboratory conditions, two contact fungicides viz., captan and copper oxy chloride, two systemic fungicides viz., propiconazole and tebuconazole, two combi fungicides, viz., azoxystrobin + tebuconazole and zineb + hexaconazole were found best. Among fungal and bacterial bioagents, T. viride (Tv-B2) and B. subtilis (Bs-O) and among botanicals, touch me not plant and neem leaf extract were found effective against the pathogen. Under field conditions, two foliar sprays of azoxystrobin + tebuconazole @ 0.1% at 15 days interval was found effective with least mean disease severity (16.78 %) and highest yield (37.23 t/ha) and BC ratio (2.49).