摘要：Mycosphaerella dearnessii in Hollenstein/Ybbs (Lower Austria) – Results 2004
In 2004, in Hollenstein/Ybbs (Lower Austria) samples were taken from 30 trees to investigate infestations by brown spot disease
– Mycosphaerella dearnessii Barr.
With microscopic inquiries at the Federal Research and Training Centre for Forests, Natural Hazards and Landscape (German
abbr. BFW),Vienna (Austria), we found 5 newly infested trees (1 Pinus sylvestris; 4 Pinus mugo). Concurrently with the
affirmation from the Department of Forest Protection, also the BOKU Vienna and the University of Pretoria confirmed the
results.
Survey on Phytophthora ramorum 2004
As well as in other European countries, a survey for the detection of Phytophthora ramorum was conducted in Austria in
2004. Forest stands and single trees (shrubs) in the surroundings of garden centres and nurseries were checked for characteristic
Phytophthora symptoms. Symptoms were found mainly on Fagus sylvatica, Aesculus sp. and species of Quercus. Samples
analyzed by PCR confirmed the presence of several native species of Phytophthora but not of Phytophthora ramorum in
Austria.
Anoplophora glabripennis – development of infestation in Braunau/Inn (Upper Austria) in 2004
In the year 2004 the intensive monitoring of the Asian Longhorned Beetle (ALB) in the city of Braunau resulted in altogether
27 infested trees found at three different locations in May, July and September. The tree species were Acer spp. (25),
Aesculus hippocastanum (1) and Fagus sylvatica ‘Asplenifolia’ (1). At one location “Neue Heimat” three Acer campestre and
two Acer pseudoplatanus showed exit holes, fresh oviposition sites, galleries of larvae and living young larvae. Four adult
beetles were caught. From these findings we concluded that at least this ALB generation has developed within only one and
a half year due to the hot and dry summer of 2003, whereas up to now a 2 year developing period under Austrian climatic
conditions seems convincing.
During 2004 infestations of Anoplophora spp. in several European countries were detected. In Germany/Bavaria the first
infestation of Anoplophora glabripennis of living trees was discovered, and BFW/Department of Forest Protection supported
the Bavarian authorities in the monitoring and examining of infested trees and the carrying out the molecular biological
diagnosis of suspicious larvae and beetles. Besides, a further Anoplophora glabripennis infestation was also found at an additional
location in France. One beetle of an indifferent Anoplophora species was caught in Poland.
