Influence of mass trapping on the population dynamic and damage-effect of bark beetles.
1992
Dimitri L. | Gebauer U. | Loesekrug R. | Vaupel O.
In extensive experiments during a period of 5 years we could prove that 1. the population density could not be substantially influenced by a massive and continuous mass trapping with pheromone baited traps neither of Ips typographus nor of Trypodendron lineatum, 2. the protection of an object by this method is in case of the first-named insect possible but against the second one not, 3. the number of bark beetles on a given place is not exclusively decisive, for the attack of trees. The monitoring in a certain time and the forecast based on this date have therefore a vague character, 4. there is a good correlation between the manner of forest management on the one hand and the population density of bark beetles of the number of attacked trees, respectively, on the other, the so-called clean-management is the best, probably the most reliable and at long sight also the most reasonable method against the propagation and the attack of the bark beetles.
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