Powdery mildew on Rhododendron caused by Erysiphe azaleae in Latvia
2013
Apine, I., University of Latvia, Riga (Latvia). Botanical Garden | Bankina, B., Latvia University of Agriculture, Jelgava (Latvia). Inst. of Soil and Plant Sciences | Nikolajeva, V., University of Latvia, Riga (Latvia). Faculty of Biology | Tomsone, S., University of Latvia, Riga (Latvia). Botanical Garden
In 2002 a fungus causing powdery mildew on Rhododendron in Latvia was discovered and identified as Erysiphe azaleae. The powdery mildew has since then been observed on leaves and seed pods of decidous azaleas as well as evergreen rhododendrons, although the disease is more sommon on taxa of deciduous azalea. Development of mature chasmothecia has been noticed at every location where disease was detected. The distribution area of E. azalea is expanding gradually from the south-west and central regions to the north and east parts of Latvia. It has been suggested, that climate change and large-scale plant import favour this process. To our knowledge, Latvia is so far the farthest north-eastern most site where E. azaleae has been detected.
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