Harmful insects and relationships between certain tree properties in Scots pine (Pinus sylvestris L.) of Ilgas Mountain, Cankiri, Turkey

Kondur Y., Oner N., Simsek Z.

Journal of Biological Sciences, vol.6, no.6, pp.1065-1070, 2006 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 6
  • Publication Date: 2006
  • Doi Number: 10.3923/jbs.2006.1065.1070
  • Journal Name: Journal of Biological Sciences
  • Journal Indexes: Scopus, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, EMBASE, Veterinary Science Database
  • Page Numbers: pp.1065-1070
  • Keywords: Crown diameter, DBH, Hamful insects, Pinus sylvestris L., Regression analysis, Tree height
  • Ankara University Affiliated: Yes

Abstract

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 in 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. © 2006 Asian Network for Scientific Information.