Erysiphe flexuosa - the new pathogen of Aesculus hippocastanum in Lithuania.

Authors
Stankeviciene, A.; Snieskiene, V.; Lugauskas, A.
Journal
Phytopathologia 2010 No. 56 pp. 67-71
ISSN
2081-1756
URL
http://www.au.poznan.pl/ptfit
Record Number
20103327406
Abstract
This paper describes the occurrence of powdery mildew, caused by E. flexuosa, in A. hippocastanum (horse chestnuts) in Lithuania. The new horse chestnut disease was established in Kaunas in July, in Siauliai in October and in Vilnius in September of 2004. Since 2004, when the powdery mildew first appeared in Kaunas, Vilnius and Siauliai, the degree of tree infestation stays constant (the degree of damage was ~1-1.5), while the damage caused by the leaf miner (Cameraria ohridella) is increasing (below 0.5 in 2005 to almost 4 in 2008 and 2009) on the hole territory of Lithuania. During 2008-09, chestnut powdery mildew was detected all over the territory of Lithuania in areas where horse chestnuts were grown in cities, towns, settlements and villages, and roadsides. Trees growing under more favourable conditions, as well as luxuriant and pruned trees, which produced larger sprouts, were observed to be more injured by the pathogen.

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