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This article in AJ

  1. Vol. 77 No. 1, p. 126-129
     
    Received: Mar 29, 1984
    Published: Jan, 1985


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doi:10.2134/agronj1985.00021962007700010030x

Response of Sugarbeet in Europe and the USA to Cercospora beticola Infection1

  1. G. A. Smith2

Abstract

Abstract

The interaction among cultivars and pathogen races is of particular relevance since sugarbeet (Beta vulgaris L.) cultivars developed in one geographic area may or may not be resistant in other areas. The objective of this study was to investigate the presence of pathological variability among indigenous biotypes of Cercospora beticola under field conditions as measured by cultivar ✕ location (biotype) interaction. Twelve sngarbeet cultivars developed in four different and unrelated breeding programs were evaluated for response to C. beticola in Greece, Italy, Spain, and the USA. The cultivars representing a wide range of inherent resistance were evaluated under field epidemics for 3 years. Results indicated that resistance to C. beticola was stable over the four diverse geographic locations and the 3 years, in all probability in the presence of several different biotypes of the pathogen. If pathogenic races do exist, as has been reported, their presence may be of limited consequence to germplasm development programs.

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