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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: Soni, Namita × End date: 2018 × Start date: 2018 × Type: Thesis ×
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    ThesisItemOpen Access
    Investigations on fruit and seed mycoflora of Bottle gourd and its management
    (CCSHAU, 2018) Soni, Namita; Kushal Raj
    The prevalence of wide variety of mycoflora is a major limiting factor in deteriorating bottle gourd (Lagenaria siceraria) crop qualitatively as well as quantitatively. In the present study, mycoflora associated with seeds and fruits of bottle gourd was isolated, evaluated and further investigated for impact of each isolate individually on bottle gourd seed germination, seedling vigour indices and germination speed under in vitro conditions. A total of eight genera and fourteen fungal species were isolated with prevalence of Fusarium proliferatum as external as well as internal seed borne mycoflora and Talaromyces pinophilus as external seed borne mycoflora. Amongst different isolates of bottle gourd, Fusarium proliferatum was found to be highly pathogenic due to maximum seed germination inhibition and the lowest seedling vigour index of seeds inoculated with this isolate. Pathogenicity tests conducted under in vivo conditions also confirmed the pathogenic nature of species of Fusarium. The isolates Rhizopus oryzae, Penicillium polonicum and Talaromyces pinophilus resulted in increased germination and vigour of bottle gourd. Amongst seven plant protectants evaluated against Fusarium proliferatum, Propioconazole 25% EC, Mancozeb 75% WP and Pseudomonas fluorescens 1 % WP performed better in inhibiting the spore germination. Investigations on efficacy of plant protectants in improving seedling health and minimizing seedling infection due to Fusarium proliferatum revealed that Propioconazole 25% EC, Copper oxychloride 50% WP and Mancozeb 75% WP were effective in reducing per cent frequency of infection while the highest germination percentage of bottle gourd seeds was observed in Trichoderma harzianum 1% WP treatment. The highest germination speed was observed in Carbendazim 50% WP followed by Trichoderma harzianum 1% WP treated seeds. Out of eight germplasm lines screened against anthracnose caused by Colletotrichum lagenarium, GH 34 had the maximum disease intensity of 64.81% while GH 35 was observed to have a minimum disease intensity of 23.33%.