EPIDEMIOLOGY AND MANAGEMENT OFANGULAR LEAF SPOT OF FRENCH BEAN CAUSED BY Phaeoisariopsis griseola (Sacc.) FERRARIS

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dc.contributor.advisorKANSAL, SANDEEP
dc.contributor.authorADIKSHITA
dc.date.accessioned2017-01-04T11:40:17Z
dc.date.available2017-01-04T11:40:17Z
dc.date.issued2012
dc.description.abstractAbstract Angular leaf spot caused by Phaeoisariopsis griseola (Sacc.) Ferraris is one of the most important foliar disease of French bean in mid hills of Himachal Pradesh. Survey and surveillance studies conducted in the present investigation revealed that the disease occurred in moderate to serve form in different French bean growing localities of Solan, Shimla and Sirmour districts of Himachal Pradesh. Temperature of 25°C was found optimum for conidial germination and the relative humidity 95 percent with 24 h of leaf wetness period favoured the disease development under controlled conditions. The epidemiological studies conducted under field conditions revealed that moderate temperature (23 ± 2°C) and high humidity (>90%) prevailing during the rainy season found to be congenial for the rapid disease progression. The in vitro evaluation of fungicides indicated Sectin (fenamidone 10% + mancozeb 50% WG) and Index (mycobutanil 10% WP) as potent growth inhibitor of P. griseola while amongst the botanicals, garlic and neem extracts were most promising. Amongst the different fungal antagonist evaluated in in vitro studies Trichoderma harzianum proved most inhibitory to P. griseola while testing their antagonistic efficacy through dual culture or through its toxic substances. The integrated management studies conducted under field conditions revealed that treatment consisting of seed treatment with Trichoderma harzianum @ 0.5% and Sectin @ 0.3% followed by pre-sowing soil application of T. harzianum @ 2.5 kg/50 kg FYM/ ha and four periodic sprays of Sectin @ 0.2% at 15 days interval started with the appearance of disease proved most efficacious in limiting the angular leaf spot disease and enhancing the green pod yield.en_US
dc.identifier.other47859
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/94348
dc.language.isoenen_US
dc.subPlant Pathologyen_US
dc.these.typeM.Sc
dc.titleEPIDEMIOLOGY AND MANAGEMENT OFANGULAR LEAF SPOT OF FRENCH BEAN CAUSED BY Phaeoisariopsis griseola (Sacc.) FERRARISen_US
dc.typeThesisen_US
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