, Volume 42, Issue 3, pp 381-386
Date: 11 Jan 2014

Present status of Citrus tristeza virus infecting Citrus spp. in Darjeeling hills and its detection in different plant parts

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Darjeeling hills of West Bengal (India) are well known for the production of mandarin orange (Citrus reticulata). The spread of Citrus tristeza virus (CTV) in this area has threatened the cultivation of citrus. Therefore, a study of the incidence and distribution of CTV in Darjeeling hills was undertaken and a geographical map was prepared. In DAS-ELISA, a high titre of CTV was recorded in the tender shoot bark, leaf petiole and mid-rib of seven Citrus spp. Three citrus species, viz., pomelo, trifoliate and kumquat, were found to be free of CTV infection when tested in double antibody sandwich-enzyme linked immunosorbent assay (DAS-ELISA) and reverse transcription polymerase chain reaction (RT-PCR).