Terpene and resin acid contents in Scots pine stem lesions colonized by the rust fungus <i>Cronartium pini</i>

Cronartium pini causes economic losses especially on Scots pine in northern Europe. reacts to rust infection by resin flow. The chemicals enriched wood after have not been investigated before. We acids and mono- sesquiterpenes produced Cronartium-infected wood. was extracted with acetone, the extractives were analysed GC-mass spectrometry (GC-MS) compared those from control Among acids, abietic acid, levopimaric palustric dehydroabietic acid neoabietic richest (32–68 mg/g) monoterpenes, concentration of ?-pinene highest (49 Concentrations all monoterpenes most significantly higher (1.3- 108-fold) In wood, extractive content greater (1.1- 14-fold) than literature suggesting that chemical processes strongly affected rust. results suggest terpenes are host protect it