Wood destroying insects in Western Black Sea region and natural durability of some industrial woods against effective insect species

The purpose of this study was to identify insect species in log depots in Western Black Sea Region. In addition to classifying the detected insects according to severity of damage, it was also to determine the damage cases of insects species in industrially important woods. In the region, seven different provinces (Düzce, Bolu, Zonguldak, Bartın, Karabük, Kastamonu, Sinop) and 21 different log depots were selected as working area. When all the research fields and methods are considered, a total of 5 taxa, 33 families and 151 different insect species have been identified. The number of insect species and their density in pheromone traps were highest in Düzce province and Yığılca Aksu log depot. The insect species detected in the pheromone traps were evaluated on the basis of their density, flight time, relation to environmental factors and severity of damage. While damage severity of Hylotrupes bajulus, Anobium punctatum, D. parallelipipedus and Camponotus vagus was found very high in holding woods and trap woods, damage severity of Arhopalus rusticus, Monochamus galloprovincialis, Acanthocinus aedilis, Acanthocinus griseus and Buprestis dalmatina was higher damage in pheremone traps. The most severe damaging insect species were identified (H. bajulus and A. punctatum). The natural durability of the industrially most used woods against these insects were tested on laboratory scale. According to the findings obtained, the mortality rate of H. bajulus larvae was calculated in fir (Abies nordmanniana) and yellow pine (Pinus sylvestris) woods. After larval test, it was observed that H. bajulus larvae sizes in the yellow pine wood were larger than the fir woods in the dimensional measurements made under the microscope. The least mortality rate of A. punctatum larvae was resulted in alder wood (Alnus glutinosa) while the highest mortality rate was resulted in exotic woods and oak and maple woods. The highest values in the size and weight measurements of A. punctatum larvae were also found in the alder wood species. Keywords: Forest depot, Harmful insects, Wood, Western Black Sea Region