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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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Author: Janvi × End date: 2023 × Start date: 2023 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Epidemiology and induction of systemic resistance in sorghum against Cercospora sorghi (Ellis & Everh.) causing grey leaf spot
    (CCSHAU, Hisar, 2023-05) Janvi; Manjeet Singh
    The grey leaf spot disease of sorghum (Sorghum bicolor L. Moench.) caused by Cercospora sorghi has emerged as a seriousprobleminmost ofthe sorghumgrowingplaces of India,leadingtoconsiderableyieldlosses. The present investigation on epidemiology, management and biochemical analysis were carried out during Kharif 2022-23. Epidemiology of the pathogen was studied under field condition in two varieties (HC 136 and CSV32F) of sorghumby sowing the cropatthreedifferentdates. Outofthethree datesof sowingof sorghum,higherdisease severity,AUDPC andAIR was observed on early sown crop (15thJune) followed by normal sown crop (30th June) and least in late sown crop (15th July) on both the varieties. Disease severity,AUDPC andAIR was higher in HC 136 as compared to CSV32F in all three dates of sowingduring Kharif 2022.Temporal increasewas maximumin 30th to 31st standard meteorological week (SMW) followed by 38th to 39th SMW in both the varieties. The inhibitory effect of chemical inducers was evaluated against Cercospora sorghi under in vitro conditions and maximum mycelial growth inhibition was recorded in salicylic acid followed by indole butyric acid. Among the biorational components evaluated against C. sorghi, neem leaves extract at 20 per cent concentration and Trichodermaharzianumandwerefoundthemost effectiveinmyceliumgrowthinhibitionofthepathogenunder in vitro conditions. Out of eight fungicides evaluated against C. sorghi, under in vitro conditions, Carbendazim 50% WP and Propiconazole 25% EC at 50 µg/ml were found most effective. Under screen house conditions, salicylic acid showed maximum per cent disease control at 100 µg/ml concentration in both the variety i.e., HC 136 (susceptible) and SH 1951 (moderately resistant). The analysis of biochemical parameters like determination of total phenol content and different enzyme activities i.e., Polyphenol Oxidase (PPO), Phenylalanine AmmoniaLyase(PAL)andTyrosineAmmoniaLyase(TAL)revealedsignificantresults.Totalphenolswerefoundmaximum in plants inoculated with conidial suspension of Cercospora sorghi and increase from 0 to 96 HAI. But in other treatments it increased upto 72 HAI and then decreased in both the varieties and being higher in SH 1951. The enzyme activities were higher in plants sprayed with salicylic acid. Polyphenol Oxidase (PPO) activity continuously increased from 0 to 96 HAI in all treatments. Phenylalanine Ammonia Lyase (PAL) and Tyrosine AmmoniaLyase(TAL)activitiesincreased upto48HAIand thendecreased from48 to96HAIin alltreatmentsof both varieties. Among the best promising non conventional chemicals, botanicals, bioagents and fungicides, carbendazim 50% WP and Propiconazole 25% EC at 50 µg/ml were found under field conditions. Out of eighty five varieties of sorghum screened against grey leaf spot, twenty three and twelve varieties were highly resistant and resistant respectively. For sorghum, which is grown as fodder crop, fungicides are often not advised due to their residual impact, therefore use of chemical inducers to induce systemic resistance in plants and integrated approaches for management of grey leaf spot is, therefore, a high-priority research area.
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    ThesisItemOpen Access
    To study morphological and optical properties of doped zinc sulfide
    (CCSHAU, Hisar, 2023-05) Janvi; Vinay Kumar
    Zinc Sulphide (ZnS) is a semiconductor receiving discernible attention as a nanomaterial scale because of excellent ion accessibility, charge storage ability, enhanced luminescent efficiency and lifetime shorting in comparison to that of bulk. However, doping of manganese (Mn) ion enhances its optoelectronic properties due to large exciton energy and wide bandgap at room temperature. ZnS and Mn-doped ZnS have been synthesized using the hydrothermal approach with 5, 10, and 20 % of Mn dopants. Prepared samples were characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), Field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), UV-Vis and Photoluminescence (PL) spectroscopy. The XRD pattern confirmed the cubic sphalerite crystal structure of prepared nanoparticles (NPs) whereas FE-SEM micrographs showed sphere-shaped NPs. The EDX spectrum measurements showed that spectra of Mn-doped ZnS exhibit peak related to elemental Mn. The stretching mode of undoped ZnS was observed at 636 cm -1 and the Zn-S-Zn network was perturbed by the presence of Mn. The energy bandgap was found to be decreased with increasing doping percentage from 5 to 20%, which is agreed to XRD. The PL spectra of Mn-doped ZnS showed at room temperature exhibit both the blue defect-related emission and orange Mn +2 emission due to the 4 T1 – 6A1 transition.