1. Ahlawat YS (1997) Viruses, greening bacterium and viroids associated with citrus (Citrus species) decline in India. Ind J Agric Sci 67:51–57
2. Ahlawat YS, Raychaudhuri SP (1998) Status of citrus tristeza and die back disease in India and their detection. In: Proceedings of sixth international citrus congress, Tel Aviv, 6–11 March, pp 871–879
3. Bar-Joseph M, Marcus R, Lee RF (2002) The continuous challenge of citrus tristeza virus control. Ann Rev Phytopathol 27:291–316
4. Biswas KK, Manjunath KL, Marais LJ, Lee RF (2003) Population diversity of Citrus tristeza virus (CTV) in single aphid transmitted sub-isolates of a South African mild strain used for cross protection. Phytopathology 93:S8
5. Biswas KK, Manjunath KL, Marais LJ, Lee RF (2004) Single aphids transmit multiple genotypes of citrus tristeza virus, but often with changed population dynamics. Phytopathology 94:S8