Objective 2. Identifying the effect of the volatile natural substances characteristic to the spruce over the Ips duplicatus adults to the commercial pheromonal atractants;



Evaluating the volatile natural characteristic of the spruce on Ips duplicatus adults response to commercial pheromone attractants (O2) will be made by field testing of the beetle Ips duplicatus response to the synthetic pheromone traps installed in the wing that is mounted in the prosecution of different seniority, in the concentration of volatile substances characteristic natural spruce varies with the age of the stump and of the existing wood material. The experiment will be installed in at least four surfaces (two fresh and two operated at least one year earlier). In each area there will be installed six-wing traps, baited with specific synthetic attractive for Ips duplicatus. The captured material will be harvested every week. Temperature and relative humidity will be monitored, using sensors recorders.

In the laboratory, the biological material captured will be analyzed, sorted, identified and sexing. Working assumption for this objective is that the adults of Ips duplicatus will respond more intensely to traps baited with synthetic pheromones installed in fresh clear cut areas, than those installed in older areas, the expected result being the confirmation of the synergistic effect of the volatile natural substances characteristic to the spruce on the attractiveness of specific synthetic pheromones, point in fact demonstrated for the species Ips typographus. It also is expected that the proportion of females will be lower in catches obtained in fresh clear cut areas compared to those from the old areas.