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Epidemiological field studies on sugar beet leaf diseases under variation of site, year and cultivar (n = 76) were performed from 1993–2004 in sugar beetgrowing regions of Lower Saxonia and Bavaria, Germany. The records established Erysiphe betae to cause powdery mildew as a main foliar disease in sugar beet, in particular, when leaf blotching caused by Cercospora beticola is relatively missing and...
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