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Mini-seedlings of Picea abies are less attacked by Hylobius abietis than conventional ones: is plant chemistry the explanation?
Högskolan Dalarna, Akademin Industri och samhälle, Skog- och träteknik.
Vise andre og tillknytning
2008 (engelsk)Inngår i: Scandinavian Journal of Forest Research, ISSN 0282-7581, E-ISSN 1651-1891, Vol. 23, nr 4, s. 299-306Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The pine weevil, Hylobius abietis (L.), is a major pest in conifer reforestation areas in the Palaearctic region. Size and chemistry of the seedlings may explain the damage rates in plantations. The performance of 10-week containerized seedlings (mini-seedlings) was compared with 1-year-old conventional seedlings of Norway spruce, Picea abies (L.), in a field experiment in central Sweden. After 2 years the weevil damage was lower for the mini-seedlings than for the conventional seedlings (3.5 vs 55%). After 3 years, the overall survival was 82 and 75%, respectively. Weevil damage was the main cause of mortality for conventional seedlings, whereas mini-seedlings mainly died from drought. Volatiles of the two seedling types were compared by solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS). Unwounded mini-seedlings and conventional seedlings differed in their compositions of monoterpenes and sesquiterpenes. Mini-seedlings mainly emitted limonene, known to be repellent to the pine weevil. When wounded, green leaf volatiles were released by mini-seedlings while the pine weevil attractant -pinene was released by conventional seedlings. Volatiles may partly explain the mini-seedlings' resistance against weevil attack. Further studies are needed to clarify how long this mini-seedling effect remains.

sted, utgiver, år, opplag, sider
Taylor & Francis , 2008. Vol. 23, nr 4, s. 299-306
Emneord [en]
Green leaf volatiles; growth; Hylobius abietis; Picea abies; seedling size; survival; terpenes; weevil damage
HSV kategori
Identifikatorer
URN: urn:nbn:se:du-2544DOI: 10.1080/02827580802203560ISI: 000258590400003OAI: oai:dalea.du.se:2544DiVA, id: diva2:519762
Tilgjengelig fra: 2007-03-21 Laget: 2007-03-21 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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