Damage status of Dendroctonus micans (Kugelann) (Coleoptera:Scolytidae) and effectiveness of Rhizophagus grandis (Gyllenhal) (Coleoptera:Rhizophagidae) on it

Damage Status of Dendroctonus micans (Kugelamt) (Coleoptera: Scolytidae) and Effectiveness of Rhizophagus grandis (Gyllenhal) (Coleoptera: Rhizophagidae) on It It's known that Dendroctonus micans Kug. (Coleoptera: Scolytidae), first determined in Turkey in 1966 is found in around 250 000 ha of 445 000 ha (oriental spruce) Picea orientalis (L.) Link, forest and continues to extend its spread. In this study spruce forests were studied in Artvin, Trabzon and Giresun Regional Directorate of Forestry to determine damage status of D. micans (Kug.) and effectiveness of R. grandis (Gyll.) on it. In 33 plots, a total of 1 186 trees were evaluated. D. micans damage was determined on 195 trees (28%) of the studied trees present on all plots. It's determined that the damage continues to last on 84 trees (12%), and the damage continues and on 1 1 1 trees (16%) D. micans damage had already taken place before the study was conducted. It was observed that D. micans damage was still continuing 43% of the harmed trees. The damage was found to have occurred before the study on 48 (47.5%) of the 101 (%14) injured trees and still continues on 38 trees (37.6%). Eighty six trees (44%) out of 195 trees damaged by D. micans, and 38 trees (45%) out of 84 trees on which D. micans was still active were wounded trees. In the studied plots, a total of 4548 entry and exit holes were counted on 191 trees. Fifty one per cent of the entry and exit holes, an indicator of the active D. micans individuals density were counted on the bole of the trees from ground level up to 1 m high. Rhizophagus grandis Gyll., the spesific predator of D. micans, were determined in 22 D. micans galleries on 18 trees in 14 plots. In these galleries, a total of 384 R. grandis and 997 D. micans were counted in different biological stages. The effectiveness of R. grandis on D. micans in plots was 84%. The effectiveness was %29, when the galleries with and without R. grandis were evaluated together in plots. When D. micans quantity in whole plots were evaluated, the general effectiveness of the predator is 15%. A total of 38 D. micans adults were found dead in resin on 22 trees. Key Words: Dendroctonus micans, Rhizophagus grandis, Effectiveness, Spesific predator