Occurrence and distribution of viral diseases of bittergourd (Momordica charantia L) in major cultivated areas of Kerala
Publication Date : 12/09/2017
In the survey conducted at five locations in Thiruvananthapuram district , Pappanchani area recorded highest incidence of viral disease (60%) while highest Vulnerability Index (V.I) was recorded from Vellayani (56.00). In Idukki district, six major bittergourd cultivating areas were surveyed among which Rajakumary area recorded the highest disease incidence (100%) and V.I (82.00). In Palakkad district, five locations were surveyed, among which Panackatri and Thekkepotta recorded highest disease incidence of 88% and highest V.I (69.00 ) . Symptoms associated with the disease include yellow mottling, mosaic, blistering, leaf curl and reduction in leaf size. Yellow mosaic and blistering is also seen in case of severe infection finally leading to stunting of the plant, reduced flowering and fruiting and hairyness on the stem. Enzyme Linked Immunosorbent Assay (ELISA) and Dot Immunobinding Assay (DIBA) revealed the presence of three viruses belonging to Begomo, CMV and POTY group causing a mixed infection in bittergourd.
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