Etiology of leaf spot diseases of lvy Gourd (Coccinia grandis (L) Voigt) and their management
By: Deepa Davis C.
Contributor(s): Beena S (Guide).
Material type:
BookPublisher: Vellanikkara Department of Plant Pathology, College of Horticulture 2003DDC classification: 632.3 Online resources: Click here to access online Dissertation note: MSc Abstract: A study on various aspects of leaf spot disease of ivy gourd was conducted
at College of Horticulture, Vellanikkara during 2002-2003. Etiological studies
revealed that Cercospora cocciniae Munjal, Lall and Chona, Colletotrichum
gloeosporioides (Penz.)Sacc, and Alternaria alternata Fr.Keissler were the main
pathogens causing different leaf spot diseases of ivy" gourd. Colletotrichum
gloeosporiotdes was found as the main pathogen causing spots on fruits of ivy
gourd. Among the nineteen ivy gourd genotypes tested eight genotypes were found
highly resistant to different leaf spot diseases. For Cercospora and Colletotrichum
leaf spots, low temperature, high humidity and high rainfall were found to favour
infection, so they were prevalent in rainy season. Alternaria infection was noticed
during summer months favouring high temperature, moderate relative humidity
and rainfall.
From the in vitro evaluation conducted for testing the efficacy of fungicides
and botanicals, 0.2 per cent copper oxychloride, copper hydroxide, captan and
mancozeb, 10 per cent leaf extract of Lantana and Adathoda, bulb extract of garlic
and 0.2 per cent neem oil were selected. The fungal antagonists Trichoderma
viride, T. harzianum and the bacterial antagonist, Pseudomonas jluorescens were
" also selected for pot culture studies. During the pot culture experiment, copper
oxychloride, copper hydroxide(both at 0.2 per cent), garlic (l0 per cent) and neem
oil (0.2 per cent) and the antagonists, Trichoderma viride (0.4 per cent) and P.
jluorescens (0.2 per cent) were found effeotive against leaf spot diseases and
selected for field evaluation. From disease management study conducted in the
field, 0.2 per cent copper oxychloride, co~per hydroxide, 10 per cent garlic and 0.4
per cent Trichoderma viride were found equally effective in controlling both leaf
and fruit infection in ivy gourd.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 632.3 DEE/IT (Browse shelf) | Available | 172206 |
MSc
A study on various aspects of leaf spot disease of ivy gourd was conducted
at College of Horticulture, Vellanikkara during 2002-2003. Etiological studies
revealed that Cercospora cocciniae Munjal, Lall and Chona, Colletotrichum
gloeosporioides (Penz.)Sacc, and Alternaria alternata Fr.Keissler were the main
pathogens causing different leaf spot diseases of ivy" gourd. Colletotrichum
gloeosporiotdes was found as the main pathogen causing spots on fruits of ivy
gourd. Among the nineteen ivy gourd genotypes tested eight genotypes were found
highly resistant to different leaf spot diseases. For Cercospora and Colletotrichum
leaf spots, low temperature, high humidity and high rainfall were found to favour
infection, so they were prevalent in rainy season. Alternaria infection was noticed
during summer months favouring high temperature, moderate relative humidity
and rainfall.
From the in vitro evaluation conducted for testing the efficacy of fungicides
and botanicals, 0.2 per cent copper oxychloride, copper hydroxide, captan and
mancozeb, 10 per cent leaf extract of Lantana and Adathoda, bulb extract of garlic
and 0.2 per cent neem oil were selected. The fungal antagonists Trichoderma
viride, T. harzianum and the bacterial antagonist, Pseudomonas jluorescens were
" also selected for pot culture studies. During the pot culture experiment, copper
oxychloride, copper hydroxide(both at 0.2 per cent), garlic (l0 per cent) and neem
oil (0.2 per cent) and the antagonists, Trichoderma viride (0.4 per cent) and P.
jluorescens (0.2 per cent) were found effeotive against leaf spot diseases and
selected for field evaluation. From disease management study conducted in the
field, 0.2 per cent copper oxychloride, co~per hydroxide, 10 per cent garlic and 0.4
per cent Trichoderma viride were found equally effective in controlling both leaf
and fruit infection in ivy gourd.
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