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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Plant Pathology × Author: Chouhan, Vinod × End date: 2023 × Start date: 2020 ×
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    ThesisItemOpen Access
    Studies on management of brown spot of rice caused by Bipolaris oryzae (Subramanium and Jain)
    (CCSHAU, Hisar, 2020-09) Chouhan, Vinod; Ashwani Kumar
    Brown spot disease is one of the most destructive diseases of rice which appear every year in Haryana and remain severe in areas where rice is grown as direct seeded crop and in upland conditions. The present studieswere undertaken on management of brown spot of rice caused by Bipolaris oryzae during Kharif season of 2019 at CCSHAU Hisar and CCSHAU, Rice Research Station Kaul, Kaithal. Fungal colony appeared whitish in colour initially which later turn olive green in culture on PDA medium. Out of nine phytoextracts, evaluated under in vitro conditions against Bipolaris oryzae, garlic cloves extract inhibited the mycelial growth of fungus by 95.04% followed by neem (84.85%) and calotropis (78.79%) leaf extracts at 30% concentration. Five better plant extracts were also evaluated as foliar spray under field conditions and the maximum per cent disease control was found in garlic cloves extract treated plots (15.04%). Among eight fungicides evaluated for their efficacy against Bipolaris oryzae under in vitro conditions, three fungicides viz., propiconazole,pyraclostrobin + epoxyconazole and tebuconazole + trifloxystrobin inhibited mycelial growth upto 100% at 0.75 ppm concentration. However, under field conditions, foliar spray of propiconazole @ 0.1% was found most effective in controlling the disease upto 63.24% followed bypyraclostrobin + epoxyconazole (50.07%). Among three bio-agents evaluated, Trichoderma harzianumwas found superior and per cent disease control was recorded as 30.15% over control. Among five non conventional chemicals ferric chloride was found superior in which per cent disease control was observed as 31.28% followed by magnesium sulphate. Out of 238 genotypes evaluated against disease, none of the genotype was found completely free from disease, however, 27 and 38 genotypes were observed to be moderately resistant and moderately susceptible, respectively, while rest of the genotypes showed susceptible to highly susceptible reaction under artificial inoculation conditions in field.