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Characteristics of Pustula tragopogonis (syn. Albugo tragopogonis ) Newly Occurring on Cultivated Sunflower in Germany
Author(s) -
Thines M.,
Zipper R.,
Schäuffele D.,
Spring O.
Publication year - 2006
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.2006.01065.x
Subject(s) - biology , sunflower , weed , temperate climate , asteraceae , botany , helianthus annuus , host (biology) , mediterranean climate , cirsium arvense , horticulture , ecology
In temperate climates, Pustula tragopogonis is rarely found on cultivated sunflower. In Europe, it was so far of little economic impact on other Asteraceae, except for some regions in the Mediterranean. In 2003, P. tragopogonis was found for the first time in sunflower fields in southern Germany. The pathogen has a widespread occurrence there, especially in the region around Stuttgart, BW. Fatty acid profiling, ultrastructural investigation and ITS sequencing revealed a high similarity to an 2002 isolate from southern Africa and an 2005 isolate from Australia, but revealed significant differences to P. tragopogonis s.l. on Cirsium arvense , a common weed, growing on or in the vicinity of sunflower fields in Germany. P. tragopogonis from this host can therefore be excluded from being the source of the reported infection.