01766nas a2200169   4500008004500000245020300045210006900248260001000317300001000327490000600337520102200343653002101365100002101386700002501407700002901432856013501461       2008                        Engldsh  00aInfestation by a Nalepella species induces emissions of alpha - and beta -farnesenes, (-)-linalool and aromatic compounds in Norway spruce clones of different susceptibility to the large pine weevil0 aInfestation by a Nalepella species induces emissions of alpha an  cMarch  a31-410 v23 aThe emissions of spruce grafts (Picea abies), caused by infestation of an acarid species of the genus Nalepella were investigated. Volatiles of three clones, both healthy and infested, with different susceptibility to the large pine weevil Hylobius abietis were collected by solid phase micro extraction (SPME) and analyzed by gas chromatograph coupled to mass-spectrometry (GC-MS). In addition, enantiomers of the main chiral compounds were separated by a two dimensional-gas chromatograph (2DGC). In the characteristic flower-like fragrances emitted by the infested grafts large amounts of E-[beta]-farnesene, E,E-[alpha]-farnesene, (-)-linalool, methyl salicylate and minute amounts of benzyl alcohol, E-anethole, methyl benzoate, neral and geranial were found. All together, these compounds could explain the characteristic scent emitted by the infested seedlings. Large differences in the emissions of E-[beta]- farnesene, E,E-[alpha]-farnesene and methyl salicylate were found between but not within the clones.10aHylobius abietis1 aKannaste, Astrid1 aVongvanich, Namphung1 aBorg-Karlson, Anna-Karin  uhttps://weevil.myspecies.info/infestation-nalepella-species-induces-emissions-alpha-and-beta-farnesenes-linalool-and-aromatic-comp