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Abstract
Abstract A description is provided for Septoria cirsii . Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Leaf spot, leaf blight (VURRO et al. , 1993), drying of leaves, perforation of leaf tissues, sometimes causing defoliation. HOSTS: Cirsium altissimum, C. appendiculatum, C. arvense, C. discolor, C. erisithales, C. heterophyllum, C. hillii, C. incanum, C. iowense, C. lanceolatum, C. laniflorum, C. leo, C. oleraceum, C. rivulare, C. segetum , C. setosum , C. vulgare , Saussurea sp., Serratula coronata, S. quinquefolia, S. radiata ( Asteraceae ). GEOGRAPHICAL DISTRIBUTION: NORTH AMERICA: Canada, USA. ASIA: Armenia, Azerbaijan, China, Republic of Georgia [ www.cybertruffle.org.uk/gruzmaps/index.htm ], Iran, Kazakhstan, Kirgizstan, Russia (West Siberia, Far East), Turkmenistan, Uzbekistan. EUROPE: Austria, Bulgaria, Czech Republic, Denmark, Estonia, France, Germany, Hungary, Italy, Latvia, Lithuania, Netherlands, Poland, Romania, Russia, Ukraine [ www. cybertruffle. org. uk/ukramaps/index. htm ]. TRANSMISSION: By airborne or splash-dispersed conidia from infected plant debris. Spores in droplets in suspension have been used in inoculation experiments.
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