Inhibition of virus transmission by guava leaf extract.
Bikash Mandal, Bijoy Singh
Author Affiliation: Regional Station, Indian Agricultural Research Institute, Kalimpong, West Bengal 734 301, India.
Indian Phytopathology 54 : 381-382
Abstract : The inhibitory effect of the extracts of some plants (Araucaria cookii [Araucaria columnaris], Artemisia vulgaris, Catharanthus roseus, Cinnamomum camphora, Mangifera indica, Pyrus communis, Psidium guajava and Rhododendron keleticum [R. calostrotum subsp. keleticum]) on the sap transmission of the Brassica isolate of turnip mosaic potyvirus [turnip mosaic virus] (TuMV-B) in B. juncea var. rugosa was investigated. Leaf extracts were inoculated on the lamina of B. juncea var. rugosa healthy seedlings just before TuMV-B inoculation. Among the leaf extracts from different plants, only that from guava leaf showed effective inhibition of viral sap transmission. In experiments with chilli mosaic virus and TuMV-B, the guava leaf extract inhibited the transmission of both viruses.