scholarly journals Contrasting vulnerability of monospecific and species‐diverse forests to wind and bark beetle disturbance: The role of management

2020 ◽  
Vol 10 (21) ◽  
pp. 12233-12245
Author(s):  
Laura Dobor ◽  
Tomáš Hlásny ◽  
Soňa Zimová
Keyword(s):  
Bark Beetle

scholarly journals Emergence levels of pine shoot beetles from roundwood piles of Scots pine and the cascading damage in the surrounding forests

Silva Fennica ◽  
2021 ◽  
Vol 55 (5) ◽  
Author(s):  
Markus Melin ◽  
Tiina Ylioja ◽  
Leena Aarnio ◽  
Katri Hamunen ◽  
Seppo Nevalainen ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Coniferous Forests ◽  
The Future ◽  
Forest Legislation ◽  
Pine Shoot Beetles

Bark beetles are amongst the most aggressive pest agents of coniferous forests. Due to this, many boreal countries have designated laws aiming to lower the risk of bark beetle epidemics. Finland’s forest legislation has pre-emptive measures targeted against bark beetles, and for Scots pine ( L.), the law concerns pine shoot beetles ( spp.). This study used data collected around 25 piles of Scots pine roundwood that were harvested in the winter but left in the forest until the following November. Thus, the pine shoot beetles were able to use the piles for breeding. We assessed the number of emerged insects from the piles and the cascading damage they caused in the surrounding forests. All roundwood piles, regardless of their volume, were used by the beetles for breeding. Highest densities of beetle exit holes were found from the parts of the log with thick and intact bark. If the bark of the log was damaged by the harvester head, the number of beetles decreased significantly. Depending on the volume of the roundwood pile, the cascading damage (fallen shoots) was noticeable up to ca. 40–60 m from the roundwood pile. Storing of piles smaller than 50 m did not cause excess damage. The number of fallen shoots per tree was generally below the known thresholds for when growth losses can occur. However, the study was conducted in mature forests, and it can be assumed that the recorded damage levels would severely affect the growth of young pines, raising the question of where to store the roundwood. As with other bark beetles, the role of beetles as damage agents may change in the future, but based on this as well as past studies, the species can be viewed as a notable damage agents only around long-term wood storage sites in the current northern conditions.Pinus sylvestrisTomicus3Tomicus

scholarly journals Studies of Parasitic Wasps (Hymenoptera: Braconidae) in Association with Mountain Pine Beetle Outbreak

2012 ◽  
Vol 35 ◽  
pp. 81-90
Author(s):  
Larry Haimowitz ◽  
Scott Shaw
Keyword(s):  
Bark Beetle ◽  
Mountain Pine Beetle ◽  
Parasitoid Wasps ◽  
Greater Yellowstone Ecosystem ◽  
Local Diversity ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Greater Yellowstone ◽  
New Distribution

A survey of parasitoid wasps (Hymenoptera: Braconidae) in Grand Teton National Park reveals undiscovered (but not unexpected) diversity, as well as changes in diversity associated with the bark beetle epidemic and the unusually warm, dry year. Our 2012 survey found nearly the same number of Braconidae subfamilies (18 vs 19) as a 2002 survey (Shaw 2002); a remarkable amount of diversity given that the 2002 survey was based upon five times as many specimens. Eleven species found in this study are new distribution records for the Greater Yellowstone Ecosystem (GYE), which points to much undiscovered local diversity. Differences from previous studies are possibly due to the unusual warmth and dryness of spring 2012, along with some influence from beetle kill. We provide a list of parasitoids and predators associated with mountain pine beetle (Dendroctonus ponderosae Hopkins) in the Greater Yellowstone Ecosystem (GYE), a stepping stone for further research to determine the role of natural enemies in bark beetle outbreak dynamics in the GYE.

scholarly journals Is it possible and necessary to control European spruce bark beetle Ips typographus (L.) outbreak in the Białowieża Forest?

2017 ◽  
Vol 78 (1) ◽  
pp. 88-92 ◽  
Author(s):  
Jacek Hilszczański ◽  
Jerzy R. Starzyk
Keyword(s):  
Bark Beetle ◽  
Ips Typographus ◽  
Natural Forests ◽  
Forest Research ◽  
Research Papers ◽  
Spruce Bark Beetle ◽  
Białowieża Forest ◽  
Spruce Bark ◽  
European Spruce Bark Beetle

Abstract In response to the information published in ‘Forest Research Papers’ (vol. 77(4), 2016), regarding the problem of the European spruce bark beetle Ips typographus (L.) in the Białowieża Forest, we present our viewpoint on this issue. The role of the European spruce bark beetle in the Białowieża Forest is discussed based on the experience gained in Europe’s forests. We present the effects of I. typographus outbreaks on forest biodiversity as well as outbreak mitigation in the context of the processes taking place in semi-natural forests.

The Eurasian spruce bark beetle: the role of climate.

2015 ◽  
pp. 202-219 ◽  
Author(s):  
B. Økland ◽  
S. Netherer ◽  
L. Marini
Keyword(s):  
Bark Beetle ◽  
Spruce Bark Beetle ◽  
Spruce Bark

Responses of Ips pini (Say), Pityogenes knechteli Swaine and Associated Beetles (Coleoptera) to Host Monoterpenes in Stands of Lodgepole Pine

2003 ◽  
Vol 38 (4) ◽  
pp. 602-611 ◽  
Author(s):  
Daniel R. Miller ◽  
John H. Borden
Keyword(s):  
Bark Beetle ◽  
Bark Beetles ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Behavioral Responses ◽  
Ips Pini ◽  
Host Volatiles ◽  
Pine Engraver ◽  
Pine Beetle

We conducted seven experiments in stands of mature lodgepole pine in southern British Columbia to elucidate the role of host volatiles in the semiochemical ecology of the pine engraver, Ips pini (Say) (Coleoptera: Scolytidae), with particular reference to the behavioral responses of predators and competing species of bark beetles. Our results demonstrated that the attraction of Ips pini and the bark beetle predators Lasconotus complex LeConte (Colydiidae), Thanasimus undatulus (Say) (Cleridae) and a Corticeus sp. (Tenebrionidae) were increased by 3-carene. In contrast, attraction of the bark beetle Pityogenes knechteli Swaine (Scolytidae) to ipsdienol was interrupted by 3-carene and α-pinene. Attraction of L. complex to ipsdienol was increased by γ-terpinene, a compound attractive to the mountain pine beetle, Dendroctonus ponderosae Hopkins (Scolytidae). Terpinolene interrupted the attraction of I. pini to ipsdienol.

Resistance to Bark Beetle Attack in Caribbean Pine: Potential Role of 4-Allylanisole1

Biotropica ◽  
2005 ◽  
Vol 37 (4) ◽  
pp. 702-705 ◽  
Author(s):  
Marc A. Snyder ◽  
Nathan W. Bower
Keyword(s):  
Bark Beetle ◽  
Potential Role ◽  
Caribbean Pine
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