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                NATURE ENEMIES-PREDATORS, PATHOGENS ANDPARASITIC NEMATODES

                        OF BARK BEETLES IN HATILAVALLEY NATIONAL PARK OF TURKEY

 

       GÖKTÜRK T.1    BURJANADZE M.2    AKSU Y.3    SUPATASHVILI A.2

                          1.      Artvin Coruh University Foresty faculty Artvin, Turkey   

                     2.      Vasil  Gulisashvili Forest Institute, 9, Mindeli. 0186 Tbilisi, Georgia

                   3.      Artvin Forest Department, Lab. Of Forest Protection, Artvin Turkey

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(Received February 8, 2010)

 

 

 

Abstract

 

The study of natural enemies of bark beetles Ips typographus, Ips sexdentatus, Dendroctonus micans from Hatila Valley National Park in Artvin, Turkey (1750-2200 m a.s.I) was carried out in different seasons (Summer and Autumn), 2008. I.typographus population in spruce forest of Hatila VNP is monitored and controlled by 3-4 pheromone traps (Ipstyp) per 1 ha. 4.000 trap pieces were hung and a number of captured beetles was more than 3 334 860.

I.typographus, I.sexdentatus and D.micans are settled under bark in one biotope. Three species of predators Thanasimus formicarius, Rhizophagus grandis and Rhizophagus depressus were found in population of bark beetles. Approximately in 26% of I.typographus, 13% of I.sexdentatus  and 8% D.micans maternal galleries larvae and adult of T.formicarius were detected. 21% and 39% of R.depressus were found in the observed gallery of I.typographus and I.sexdentatus at the same regions of investigation. Ahigh density (66%) of Rhizophagus grandis, predator of D.micans was observed. Various pathogen species and nematodes are observed in the population of bark beetles. Protozoa, Gregarina typographi, was revealed in I.typographus (41.1-49.5%) and I.sexdentatus (17.3%). Chytridiopsis typographi was found in I.typographus (9.1-15%) and I.sexdentatus, (4.1%). The first data on distribution and occurrence of Ch. Typographi in Turkey was obtained. Fungal infection Beauveria bassiana (1.5%) and Penicillium sp. (7.6%) were found in adult I.typographus. Virus, like entomopoxvirus – EPV (1.5%) and nematodes (40.7-71.4%) Contortylenchus diplogaster and Bursaphelenchus sp. were observed in I.typographus. Contortylenchus sp. was found in I.sexdentatus, 26.1% of nematodes were associated with D.micans.

Key words: Ips typographus, Ips sexdentatus, Dendroctonus mican, Thanasimus formicarius, Rhizophagus grandis, Rhizophagus depressus, Gregarina typographi, Chytridiopsis typographi, Beauveria bassiana, Contortylenchus diplogaster, Contortylenchus sp.