Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810029797
Authors: Kavyashree M. C.
Advisor: Dr. K. B. Yadahalli
Title: STUDIES ON FUNGAL FOLIAR DISEASES OF GREENGRAM (Vigna radiata L.) Wilczek
Publisher: University of Agricultural Sciences, Dharwad
Language: en_US
Type: Thesis
Agrotags: null
Keywords: STUDIES ON FUNGAL FOLIAR DISEASES OF GREENGRAM (Vigna radiata L.) Wilczek
Abstract: Greengram [Vigna radiata L. Wilczek] is an important pulse crop of India. The crop is affected by many fungal foliar diseases such as Cercospora leaf spot, powdery mildew and anthracnose. The severity of Cercospora leaf spot ranged from 10.38 to 69.62 PDI, powdery mildew (9.13 to 52.64 PDI) and anthracnose (0.00 to 47.34 PDI). The hot spots identified for Cercospora leaf spot and anthracnose are Dharwad, Lokur (Dharwad taluk) and for powdery mildew are Sasvihalli, Basapur, Majjigudda villages (Navalgund taluk). Morphological and molecular identification of pathogens revealed that Cercospora canescens Ellis and Martin, Erysiphe polygoni DC and Colletotrichum gloeosporioides Penz. are the causal organisms of foliar fungal diseases of greengram. Fourty and fifty days old plants were identified as the most susceptible stages for infection of Cercospora leaf spot, powdery mildew and anthracnose diseases. In vitro evaluation of fungicides revealed that hexaconazole 5% EC (0.1% and 0.15%), carbendazim 25% + mancozeb 50% WS (0.05%, 0.1% and 0.2%) and mancozeb 75 WP (0.2% and 0.25%) were found effective against C. canescens. The propiconazole 25% EC, trifloxystrobin 25% + tebuconazole 50% w/w (0.05%, 0.1% and 0.15%) and copper oxychloride 50 WP (0.25%) were identified as the most effective fungicides against C. gloeosporioides. The systemic fungicides, hexaconazole 5% EC (0.1%) and azoxystrobin 250% SC (0.15 %) were found effective against E. polygoni. The genotypes Selection- 4 × Co-7-2 (F5) and Selection- 4 × Co-7-10 (F5) were identified as multiple disease resistant lines against foliar fungal diseases under both field and glasshouse conditions. Seed treatment with carbendazim 25% + mancozeb 50% @ 2g/kg + foliar spray with trifloxystrobin 25% + tebuconazole 50% WG @ 0.05% or spray with hexaconazole 5 % EC @ 0.1 % were found effective components in managing the fungal foliar diseases and recorded highest yield with better economic returns.
Subject: Plant Pathology
Theme: STUDIES ON FUNGAL FOLIAR DISEASES OF GREENGRAM (Vigna radiata L.) Wilczek
These Type: M.Sc
Issue Date: 2014-06-01
Appears in Collections:Thesis

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