@ARTICLE{TreeBASE2Ref29136, author = {Noel Liam Knight and Niloofar Vaghefi and Julie R Kikkert and Sarah J Pethybridge}, title = {Alternative hosts of Cercospora beticola in field surveys and inoculation trials}, year = {2019}, keywords = {}, doi = {10.1094/PDIS-01-19-0229-RE}, url = {}, pmid = {}, journal = {Plant Disease}, volume = {}, number = {}, pages = {}, abstract = {Cercospora beticola, the cause of Cercospora leaf spot (CLS) of sugar beet and table beet, has a broad range of potential alternative hosts. The role of these hosts as inoculum sources in the field is unclear, and has had limited investigation since the advent of DNA-based pathogen identification. The presence of C. beticola on alternative hosts associated with table beet fields of New York was assessed in field surveys during 2016. Lesions were collected, and 71 cercosporoid-like conidia were isolated for phylogenetic comparison. C. beticola was identified from Solanum ptychanthum (n = 4), Chenopodium album (n = 2) and Spinacia oleacera (n = 1), while C. chenopodii was identified on C. album (n = 51). Artificial inoculation of 21 plants species demonstrated C. beticola was pathogenic to Brassica kaber, C. album, Carthamus tinctorius, Rumex obtusifolius and S. oleacera. These results indicate that while C. beticola may be pathogenic to a range of plant species, the role of symptomatic tissue for inoculum production on alternative hosts in the field appears limited. Observations of C. beticola on necrotic and naturally senescent tissue suggests saprophytic survival on plant debris of a range of species, which has implications for CLS epidemics and disease management. } }

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