Abstract
A description is provided for Uromyces betae[Uromyces beticola]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On sugar beet, beetroot, spinach beet, mangolds and wild beet (Beta vulgaris subsp. vulgaris, B. vulgaris subsp. maritima), Beta vulgaris, B. cycla, B. rapa. DISEASES: Beet rust. First appears as small, cinnamon brown pustules scattered over the lamina, which in susceptible plants quickly spreads over the entire foliage causing the older leaves to wilt, wither and die prematurely. The younger leaves remain erect but their blades become crumpled drooping and yellowish. Badly rusted plants with blisters on leaf blades and petiole finally collapse. GEOGRAPHICAL DISTRIBUTION: Africa (Algeria, Canary Is., Libya, Madeira, Morocco, S. Africa); Asia (Israel, Iran, U.S.S.R.); Australasia (Australia, New Zealand, Tasmania); Europe (Austria, Belgium, Bulgaria, Channel Islands, Czechoslovakia, Cyprus, Denmark, Finland, France, Germany, Greece, Great Britain, Holland, Hungary, Ireland, Italy, Latvia, Malta, Norway, Poland, Portugal, Rumania, Sardinia, Spain, Sweden, Switzerland, Turkey, U.S.S.R., Yugoslavia); N. America (Canada, Mexico, U.S.A.); S. America (Argentina, Bolivia, Chile, Uruguay). (C.M.I. Map No. 265) TRANSMISSION: Mainly by urediospores (McKay, 1952, 44, 566a). Overwinters on seed crop stecklings, clamped mangolds, groundkeeping beet and mangolds. Spores adhering to seed clusters helps to spread the disease. Reports from U.S.S.R. indicate that teliospores retain viability for 2 yrs. in store houses.
British zoophytes : an introduction to the hydroida, actinozoa, and polyzoa found in Great Britain, Irleand, and the Channel Islands / by Arthur S. Pennington.
