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Silva Fennica 1926-1997
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Articles by Martti Varama

Category : Article

article id 5584, category Article
Tarmo Virtanen, Seppo Neuvonen, Pekka Niemelä, Ari Nikula, Martti Varama. (1996). Climate change and the risks of Neodiprion sertifer outbreaks on Scots pine. Silva Fennica vol. 30 no. 2–3 article id 5584. https://doi.org/10.14214/sf.a9229
Keywords: Pinus sylvestris; climate change; GIS; Neodiprion sertifer; cold tolerance; winter temperatures; insect outbreaks
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Category : Research article

article id 360, category Research article
Timo Kurkela, Tarmo Aalto, Martti Varama, Risto Jalkanen. (2005). Defoliation by the common pine sawfly (Diprion pini) and subsequent growth reduction in Scots pine: a retrospective approach. Silva Fennica vol. 39 no. 4 article id 360. https://doi.org/10.14214/sf.360
Keywords: height growth; NTM; defoliation; insect attack; needle density; needle production; needle retention; radial growth; herbivory
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article id 660, category Research article
Erkki Annila, Bo Långström, Martti Varama, Risto Hiukka, Pekka Niemelä. (1999). Susceptibility of defoliated Scots pine to spontaneous and induced attack by Tomicus piniperda and Tomicus minor. Silva Fennica vol. 33 no. 2 article id 660. https://doi.org/10.14214/sf.660
Keywords: Scots pine; defoliation; Scolytidae; Diprionidae; induced attack; Tomicus piniperda; Tomicus minor; Diprion pini
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Category : Research note

article id 23026, category Research note
Michael M. Müller, Leena Hamberg, Martti Varama. (2023). Palatability of Norway spruce needles infected with Lophodermium piceae to larvae of two sawfly species. Silva Fennica vol. 57 no. 3 article id 23026. https://doi.org/10.14214/sf.23026
Keywords: antagonism; herbivory; fungi; Neodiprion sertifer; Gilpinia pallida; palatability
Highlights: We describe the first experiment including both endophyte inhabited and endophyte free intact needles of Norway spruce for examining the possible effect of endophytes on the palatability of needles to insect larvae; The extent of needles consumed by neither of two sawfly species, Neodiprion sertifer and Gilpina pallida, differed depending on endophyte presence.
Abstract | Full text in HTML | Full text in PDF | Author Info

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