Şahin, G.Özder, Nihal2022-05-112022-05-1120171302-7050https://hdl.handle.net/20.500.11776/9639This study was carried out to determine the bark beetles species collected in Düzce (Esentepe, Çamlipinar and Hamamüstü) during the 2013-2014. Four bark beetles (Col: Scolytidae), were determined at the end of this study. These species are Xyleborus dispar Fabricius, Xyleborus saxeseni Ratzeburg, Xyleborus germanus Blanford and Lymantor coryli Perris. L. coryli was found very few rate in only Çamlipinar village. The number of X. saxeseni adults was found much more in the village of Hamamüstü and Çamlipinar while in Esentepe the number of X. dispar bark beetles was more compared to the rate of other species in 2014. First adult flights of bark beetles in Çamlipinar village were determined between 13-18 March in 2013. First adult flights X. dispar and X. saxeseni in spring were determined from the second week of March (13-19 March), the first adult flights of X. germanus happened at the last week of March (21-27 March) in 2014. The flights of X. dispar in summer term begin from the first week of July. The harm rate of bark beetles were determined in hazelnut orchards in 2013 and 2014. © 2017 Namik Kemal University - Agricultural Faculty. All rights reserved.trinfo:eu-repo/semantics/closedAccessDüzceHazelnutLymantor coryliXyleborus disparXyleborus germanusXyleborus saxeseniArticle14327372-s2.0-85044764446Q3