Current issue: 58(5)

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Silva Fennica 1926-1997
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Acta Forestalia Fennica
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Articles containing the keyword 'needle loss'

Category : Article

article id 4464, category Article
Esko Kangas. (1932). Tutkimuksia kaasutuhoista Imatran valtionpuistossa. Silva Fennica no. 23 article id 4464. https://doi.org/10.14214/sf.a9020
English title: Studies on gas damages in the state forests in Imatra.
Original keywords: ilman epäpuhtaudet; Imatra; kloori; lehtikato; metsätuhot; neulaskato; hyönteistuhot
English keywords: damage; needle loss; insect damage; air pollutants; chlorine; emissions; leaf injuries
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Category : Research article

article id 1615, category Research article
Minna Blomqvist, Päivi Lyytikäinen-Saarenmaa, Tuula Kantola, Maiju Kosunen, Mervi Talvitie, Markus Holopainen. (2016). Impacts of natural enemies and stand characteristics on cocoon mortality of the pine sawfly Diprion pini in a Fennoscandian boreal forest. Silva Fennica vol. 50 no. 5 article id 1615. https://doi.org/10.14214/sf.1615
Keywords: needle loss; Diprionidae; population dynamics; forest floor vegetation; parasitism; predation
Highlights: Annual cocoon mortality caused by natural enemies varied between 66% and 80% during the six-year study period, most of it caused by the family Ichneumonidae; Basal area, and coverage of lichen (Lichenes) and lingonberry (Vaccinium vitis-idaea L.) best explained cocoon parasitism and predation; Combination of suitable stand characteristics, abiotic environmental factors, and incomplete control by natural enemies enabled pest species to extend its gradation phase.
Abstract | Full text in HTML | Full text in PDF | Author Info
article id 654, category Research article
Margus Pensa, Risto Jalkanen. (1999). Needle chronologies on Pinus sylvestris in northern Estonia and southern Finland. Silva Fennica vol. 33 no. 3 article id 654. https://doi.org/10.14214/sf.654
Keywords: needle age; needle trace method; needle retention; crown thinning; needle loss; shedding
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