1. Afanasiev, M.M., Morris, H.E. and Carlson, W.E. (1942). The effect of preceding crops on the amount of seedling diseases of sugar beets. Proceedings of the American Society of Sugar Beet Technologists, 3, 435–6.
2. Kiev Gosseljhozizdat USSR;VA Agarkov,1963
3. Ark, P.A. and Leach, L.D. (1946). Seed transmission of bacterial blight of sugar beet. Phytopathology, 36, 549–53.
4. Asher, M.J.C. and Williams, G.E. (1991). Forecasting the national incidence of sugar-beet powdery mildew from weather data in Britain. Plant Pathology, 40, 100–7.
5. Bulletin of Sugar Beet Research, Japan;CW Baba,1966