Der Buchdrucker (Ips typographus L.) (Col., Scolytidae) und seine Problematik in der Tschechischen Republik

Abstract

The Czech Republic is passing the third outbreakperiod ofIps typographus since 1880. The first and second outbreaks (1870–1876 and 1945–1954) were a consequence of falling of masses of trees caused by storm. The data ofIps duplicatus during the first outbreak mentioned in later papers are a mistake, reality it has beenIps amitinus.

The third outbreak from 1980 until now has not one but several from man dependent and not dependent causes. There are: Falling of trees, by repeating windstorms damage of trees by pollutions of SO₂ and their pollutants, the increasing temperatures during the last period of 30 years and the development of higher numbers of generations of the beetle. The successes in using pheromones in control ofIps typographus were overestimated. Also the changes in the ownership of forest stands were of importance.

Ips duplicatus occured in North Moravia having been migrated across Northpoland to the east Czech Republic.

In the Nationalpark of Šumava (on the other side to the Nationalpark of Bavaria) in some reservations no measures againstIps typographus as in Bavaria were made. Here new control measures must be taken against this pest.