Results 41 to 50 of about 92,573 (158)

Conifer Regeneration After Experimental Shelterwood and Seed-Tree Treatments in Boreal Forests: Finding Silvicultural Alternatives

Frontiers in Plant Science, 2018
Forest regeneration is a key element in achieving sustainable forest management. Partial harvest methods have been used extensively in temperate broadleaf and mixedwood ecosystems to promote regeneration on poorly stocked sites and to maintain forest ...
Miguel Montoro Girona, Miguel Montoro Girona, Jean-Martin Lussier, Hubert Morin, Nelson Thiffault   +4 more
doaj   +1 more source

Life‐History Traits and Overwintering of Actia interrupta (Diptera: Tachinidae), a Larval Parasitoid of Choristoneura fumiferana (Lepidoptera: Tortricidae)

Entomologia Experimentalis et Applicata, EarlyView.
Actia interrupta is a larval tachinid parasitoid that plays a key role in regulating low‐density populations of the eastern spruce budworm. We describe its immature stages, life‐history traits, host‐searching behavior, development, and confirm its larviparous reproductive strategy.
Véronique Martel, Jacques Régnière, Jean‐Claude Thireau, Rob C. Johns   +3 more
wiley   +1 more source

Forest Structure and Composition Diverge Following Harvesting Compared to a Spruce Budworm Choristoneura fumiferana (Clem.) Outbreak

Frontiers in Forests and Global Change, 2022
Balsam fir (Abies balsamea) is the most vulnerable species to the spruce budworm (Choristoneura fumiferana), one of the most devastating defoliators in the world.
Daniel D. Kneeshaw, Louis De Grandpré, Loïc D’Orangeville, Maryse Marchand, Jeanne Moisan-Perrier, Louis-Etienne Robert, Mathieu Bouchard   +6 more
doaj   +1 more source

Canopy position and tree size structure the distribution of honeydew‐producing scale insects (Hemiptera: Coccoidea) in a temperate hardwood forest

Ecological Entomology, EarlyView.
Scale insect abundance peaked in the upper canopy of sugar maples. Parthenolecanium peaked on older internodes; Lepidosaphes on the current leader. Internodes longer than the previous carried more scales; wider ones fewer. Abstract Forest canopies are vertically stratified habitats in which microclimate and host tissue quality vary with height.
Susan M. Frye, Sandy M. Smith, Sean C. Thomas   +2 more
wiley   +1 more source

Balsam Fir.

, 2008
Balsam Fir.
Ohio Agricultural Experiment Station. Dept. of Forestry.
core   +1 more source

Conifer host identity shapes wood‐boring beetle communities more than climate across a latitudinal forest gradient in Quebec (Canada)

Insect Conservation and Diversity, EarlyView.
Host tree identity and latitude shaped wood‐boring beetle assemblages, with species richness declining northward but community composition varying among regions and hosts. Host tree species influenced beetle communities more strongly than climate; black spruce supported the most species, while eastern hemlock hosted very few.
Nicolas Perrault, Emilie Champagne, Mathieu Bouchard   +2 more
wiley   +1 more source

Legacy effects of precommercial thinning on the natural regeneration of next rotation balsam fir stands in eastern Canada

Silva Fennica, 2019
The Green River precommercial thinning (PCT) trial was established between 1959–1961 in New Brunswick (Canada) within natural balsam fir (Abies balsamea (L.) Mill.)-dominated stands.
Claudie-Maude Canuel, Nelson Thiffault, Michael K. Hoepting, James C.G. Farrell   +3 more
doaj   +1 more source

First findings of an invasive tandem bark beetle – phytopathogenic fungus in the Middle Ural megalopolis [PDF]

Сибирский лесной журнал
The four-eyed fir bark beetle (Polygraphus proximus Blandford) and the fungus (Grosmannia aoshimae (Ohtaka, Masuya & Yamaoka) Masuya & Yamaoka) form an extremely aggressive invasive tandem affecting Siberian fir (Abies sibirica Ledeb.) throughout almost ...
Yu. N. Baranchikov, V. I. Ponomarev, N. V. Pashenova, A. A. Efremenko, D. Yu. Golikov, G. I. Klobukov, B. V. Krasutskiy, N. I. Kirichenko   +7 more
doaj   +1 more source

Variation of Stem Radius in Response to Defoliation in Boreal Conifers

Frontiers in Forests and Global Change, 2021
In the long term, defoliation strongly decreases tree growth and survival. Insect outbreaks are a typical cause of severe defoliation. Eastern spruce budworm (Choristoneura fumiferana Clem.) outbreaks are one of the most significant disturbances of Picea
Lorena Balducci, Philippe Rozenberg, Annie Deslauriers   +2 more
doaj   +1 more source

From quantity to quality: the evolution of forest restoration in the United Kingdom

Restoration Ecology, EarlyView.
Abstract Introduction Over the past century, forest cover in the United Kingdom has increased threefold. However, the pathways, achievements, and shortcomings of this expansion remain underexplored. Objectives This study analyses the drivers, implementation, and legacies of forest restoration in the United Kingdom before and after 1990, which is when ...
Susanne Raum, Maitane Erdozain, Keith Kirby, Iciar Alberdi, Sergio de‐Miguel   +4 more
wiley   +1 more source