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THE PRODUCTIVITY OF SUGAR BEET MONOGERM LINES DEPENDING ON CERCOSPORA (Cercospora beticola Sacc.) SUSCEPTIBILITYKeywords: sugar beet , yield , root quality , Cercospora beticola Sacc. Abstract: The producing values of monogerm CMS lines of sugar beet and their tolerance on cercospora leaf spot are investigated in Osijek during two years (2001, 2002) under the following conditions: natural infection and full protection with fungicides. The parameters for evaluation were root quality and yield, just as visual review of leaf damages. Twenty eight genetically divergent CMS lines and two standards were confirmed by the examinations. The test results indicate achieved progress in breeding and monogerm CMS lines value which can be used for obtaining new hybrids and further improvements. Three investigated lines achieved high root yield on the level of standards and even ten lines had the same or higher digestion than better standard. It was found out that in the case of fungicide apply, root yield increased on the average by 7.09 t/ha (16%), sugar content by 0.81% (rel. 5%) and sugar yield by 1.38 t/ha (22.8%). Protection measures with fungicides had higher influence on production results of line being susceptible to cercospora and compared to cercospora tolerant lines.
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