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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: Nematology × Author: Saharan, Ritul × End date: 2022 × Start date: 2020 ×
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    ThesisItemOpen Access
    Isolation, identification and evaluation of indigenous fungal bio-agents against Meloidogyne incognita in okra
    (CCSHAU, Hisar, 2021-07) Saharan, Ritul; Patil, J.A.
    Investigations were carried out for the Isolation, identification and evaluation of indigenous fungal bio-agents against Meloidogyne incognita in okra both under in-vitro and pot house conditions. Under in-vitro condition, the effect of fungal isolates on egg hatching inhibition and juvenile mortality of Meloidogyne incognita was assessed at various concentrations, i.e., 20%, 40%, 60% and 80%. Among all the isolates, Trichoderma asperellum FbMi-6 gave significantly highest and maximum mortality of root-knot nematode juvenile followed by Trichoderma asperellum FbMi-4, at all the four concentrations. The highest mortality of juveniles was observed at 80% concentration. For hatching inhibition of root-knot nematode at all the different concentrations, i.e., 20%, 40%, 60% and 80% showed that all fungal isolates inhibited the hatching of root-knot nematode as compared to the untreated check. Significantly highest and maximum egg hatching inhibition was observed in Trichoderma asperellum FbMi-6 followed by Trichoderma asperellum FbMi-4. The rate of juvenile hatching of all the isolates was inversely proportional to the concentration of culture filtrate. The nematicidal activity of the culture filtrates of Trichoderma isolates increased with the increase in the concentration of the filtrates and the time of exposure. Under pot conditions, significantly highest plant growth parameters (plant height, fresh shoot and root weight, dry shoot and root weight, germination percentage and germination vigour) were achieved in neem cake enriched with T. asperellum FbMi-6 @ 20g kg-1 soil followed by neem cake enriched with T. asperellum FbMi-4 @ 20g kg-1 soil. Numbers of galls per plant, number of eggs per egg mass, number of egg masses per plant, final nematode population and reproduction factor were significantly lowest in T. asperellum FbMi-6 @ 20g kg-1 soil followed by neem cake enriched with T. asperellum FbMi-4 @ 20g kg-1 soil. Higher amount of polyphenols, total chlorophyll, nitrogen balance index, anthocyanin and flavonoids in neem cake enriched with T. asperellum FbMi-6 @ 20g kg-1 soil as compared with untreated inoculated check.