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Darjeeling and Sikkim hills of India are well known for production of mandarin orange (Citrus reticulata). The recent spread of Citrus tristeza virus (CTV) has threatened the citrus cultivation in this region. During a survey in Darjeeling and Sikkim hills, pomelo trees were recorded as CTV free. Since pomelo trees did not show any disease appearance, a study was undertaken to ascertain whether they...
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