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Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (20): 130-138.doi: 10.11924/j.issn.1000-6850.casb17060034

Special Issue: 园艺

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Cercospora Leaf Spot of Sugarbeet in Heilongjiang: Classification of Disease Areas and Variety Resistance

  

  • Received:2017-06-06 Revised:2017-11-23 Accepted:2017-11-25 Online:2018-07-13 Published:2018-07-13

Abstract: The paper aims at the prevention and control of Cercospora leaf spot (CLS) of sugarbeet. The disease index (DI) of 166 sugarbeet varieties were investigated by field test in 10 regions of Heilongjiang from 2009 to 2016. The results showed that: the regions were divided into 3 disease areas as light, middle and heavy areas; the resistance levels of the varieties were divided into 6 levels, including high resistant, resistant, middle resistant, medium sensitive, sensitive and high sensitive varieties; the area with the disease index (DI) less than 15 was light disease area, 1530 was the heavy disease area; high resistance varieties had DI≤20, resistant varieties had 20