01599nas a2200229 4500008004100000245010600041210006900147300001000216490000700226520086000233653001801093653002001111653001701131653002001148653001701168653001901185653001501204653002201219100001501241700001801256856009501274 2010 eng d00aPhytophthora alder decline: disease symptoms, causal agent and its distribution in the Czech Republic0 aPhytophthora alder decline disease symptoms causal agent and its a12-180 v463 a

Phytophthora decline of riparian alder populations has recently become an important problem in many European countries, including the Czech Republic. The causal agent, Phytophthora alni, has spread quickly in the Czech Republic. Hundreds of kilometres of riparian alder stands, especially in the western part of the country, have been severely affected to date. Diseased trees show symptoms characteristic of Phytophthora root and collar rot; these include small, sparse and yellowing foliage, crown dieback, presence of exudates on the bark and necroses of collar and root tissues. Infected trees usually die within a few years, or they become irreversibly damaged, and their function in bank reinforcement declines. The ecological and mechanical functioning of severely affected alder stands may be seriously disrupted.

10aalder decline10aAlnus glutinosa10aAlnus incana10ableeding canker10acommon alder10aCzech Republic10agrey alder10aPhytophthora alni1 aČerny, K1 aStrnadová, V uhttp://www.agriculturejournals.cz/web/pps.htm?volume=46&firstPage=12&type=publishedArticle