BIO-INTENSIVE MANAGEMENT OF FUSARIUM WILT OF TOMATO UNDER PROTECTED CULTIVATION

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dc.contributor.advisorBHARAT, NARENDER K.
dc.contributor.authorSHARMA, JITENDER
dc.date.accessioned2016-12-28T10:41:48Z
dc.date.available2016-12-28T10:41:48Z
dc.date.issued2012
dc.description.abstractABSTRACT The present investigation on “Bio-intensive management of Fusarium wilt of tomato under protected cultivation” was carried out in the Department of Plant Pathology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (Himachal Pradesh) under laboratory and polyhouse conditions during 2011-12 to work out a biologically sustainable management strategy against Fusarium wilt of tomato. During the survey of tomato growing areas in four districts in mid hills of Himachal Pradesh viz. Solan, Sirmour, Hamirpur and Bilaspur, the overall incidence of Fusarium wilt was observed to be 19.50 per cent in polyhouses. The pathogen Fusarium oxysporum f. sp. lycopersici (FOL) was isolated from affected plants and pathogenicity was proved. Three fungal BCAs viz. Trichoderma harzianum, T. viride, T. hamatum and one bacterial antagonist Pseudomonas flourescens were isolated from tomato soil in pure cultures. Four different genera of arbuscular-mycorrhizal (AM) fungi were found associated with rhizospheric soil of tomato plants and identified to be Glomus spp., Acaulospora spp., Scutellospora spp. and Gigaspora spp. These AM fungi were multiplied on Guinea grass in pots. Amongst different BCAs tested in vitro T. viride was found most effective which resulted up to 49.86 per cent inhibition to mycelial growth of FOL in dual cultures. Amongst different biofumigant crop residues (green as well as dry) tested in vitro, taramira resulted highest inhibition in mycelial growth of FOL i.e. 62.59 and 60.74 per cent, respectively. All the effective bio-intensive management inputs evaluated under in vitro conditions were again evaluated under polyhouse in an integrated manner. The results of polyhouse experiment indicated that integration of bio-intensive management practices like bio-fumigation of sick soil with taramira crop residues for 30 days and soil application of talc based formulation of T. viride after mixing with FYM and inoculation of transplants with culture of indigenous AM fungi provided more than 80 per cent disease control of Fusarium wilt of tomato caused by Fusarium oxysporum f. sp. lycopersici under protected cultivation conditions. This bio-intensive management practice also increased growth parameters viz., height, number of branches and plant dry weight as well as yield parameters like number of fruits per plant and fruit yield per plot. Colony forming units (cfu/g) of Fusarium spp. were found reduced and that of Trichoderma spp. were increased in soil with this treatment. The spore population of AM fungi was also found more in the plots receiving this treatment as compared to control.en_US
dc.identifier.other47883
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/93399
dc.language.isoenen_US
dc.subPlant Pathologyen_US
dc.these.typeM.Sc
dc.titleBIO-INTENSIVE MANAGEMENT OF FUSARIUM WILT OF TOMATO UNDER PROTECTED CULTIVATIONen_US
dc.typeThesisen_US
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