In this study, five sample plots were selected from pure Scots pine (Pinus sylvestris L.) stands and DBH, height and crown diameter were measured on the live Scots pine trees, of which DBH was higher than 4 cm, in these sample plots in Ilgaz Mountain, Cankiri, Turkey. According to inspections on bark samples which obtained from Scots pines in sample plots and catches at the light trap, Ips acuminatus (Gyll.), Orthotomicus erosus (Woll.), Pityogenes quadridens (Hartig) (Coleoptera: Scolytidae), Dendrolimus pini (L.) (Lepidoptera: Lasiocampidae) and Sphinx pinastri (L.) (Lepidoptera: Sphingidae) were determined at stands of 15-45 cm dbh, 50-110 age, 30-50% slope, generally southeast and southwest aspects and at elevation of 1420-2080 m where Scots pine dominated. Regression analysis showed that there were statistically significant (p<0.001) and strong (R2>0.50) relationships between DBH, tree height and crown diameter variables in Scots pines. The strongest relationship determined was the crown diameter-tree height relationship (R2 = 0.977), followed by the tree height-DBH (R2 = 0.893) and crown diameter-DBH (R2 = 0.874) relationships, respectively.
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Yalcin Kondur, Nuri Oner and Ziya Simsek, 2006. Harmful Insects and Relationships Between Certain Tree Properties in Scots Pine (Pinus sylvestris L.) of Ilgaz Mountain, Cankiri, Turkey. Journal of Biological Sciences, 6: 1065-1070.
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