Hannes Krehan

Forest Research Centre BFW · Institute of Forest Protection

The use of wood packaging materials (WPMs) in international trade is recognized as a pathway for the movement of invasive pests and as the origin of most introductions of Asian longhorned beetle, Anoplophora glabripennis (Motschulsky) (Coleoptera: Cerambycidae) in Europe and North America. Following several pest interceptions on WPM associated with...

Forest disturbance regimes have intensified in many parts of the world in recent decades, and are an increasing problem for managers concerned with the sustainable and continuous provisioning of forest ecosystem services. In order to address these changes an improved understanding of disturbance regimes is needed, particularly with regard to their...

Most of the coniferous wood of non-European origin that is imported into the European Union (EU) has to be inspected phytosanitarily, to prevent the introduction and spread of harmful pests in EU territory. Wood importers have been caught declaring Siberian larch wood as being of European origin to save the costs of the inspection. Therefore, an un...

Drveće je tijekom svoga života neprekidno u dinamičnom odnosu sa svojom okolinom, izloženo različitim i brojnim činiteljima žive i nežive prirode. Znatan broj čimbenika štetno utječe na razvoj i na opstanak stabala u urbanim sredinama. Najčešći i najštetniji uzroci poremećaja zdravstvenog stanja drveća urbanih sredina definirani su i opisani u sklo...

By the end of summer 2005, four sites of infestation by Anoplophora glabripennis (Coleoptera, Cerambycidae) had been detected in three European countries: Austria in 2001, at Braunau am Inn; France in 2003, at Gien, and in 2004, at Sainte-Anne-sur-Brivet; and Germany in 2004, at Neukirchen am Inn. Two sites of infestation by Anoplophora chinensis h...

larval specimens could be assigned to the species A. glabripennis. The Bavarian plant protection service started monitoring the pest in Neukirchen.

Background: Thaumetopoea processionea L. (order Lepidoptera), the oak processionary moth, is found in oak forests in most European countries. Its third to sixth larval instars are armed with poisonous hairs (setae) containing an urticating toxin (thaumetopoein) potentially harmful to humans. Because T. processionea infests trees at the edges of fo...

The horsechestnut (Aesculus hippocastanum) is one of the most popular shade trees in central Europe. Although it was introduced only 400 years ago from southeast Europe, at least 20,000 horsechestnuts grow in Vienna and its environs. The horsechestnut was a tree species with few health problems (e.g., Guignardia aesculi Ascomycetes) until the leafm...

Forest Protection Situation 2010 in Austria In 2010, humid weather conditions favoured the vitality of the most tree species and also various diseases, whereas pests were affected adversely. Nevertheless, the damage by bark beetles did not go back substantially; the amount of damaged wood was 2.7 million mm and reached nearly the record amount of 2...