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2. Abe H, Tamada T (1984) Effect of preceding crops and weeds on the severity of rhizomania disease of sugar beet. Proc Sugar Beet Res Assoc Jpn 26:151–157
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4. Abe H, Ui T (1986) Host range of Polymyxa betae Keskin strains in rhizomania-infested soils of sugar beet fields in Japan. Ann Phytopathol Soc Jpn 52:394–403
5. Abe H, Akashi K, Tamada T (1985) Relation between patterns of occurrence of rhizomania disease of sugar beet and physical and chemical properties of soil in Chitose area. Proc Sugar Beet Res Assoc Jpn 27:57–64