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Keyword: semiochemicals

Beetle pheromones and maple volatiles reduce spruce beetle attacks on spruce trees

Science Spotlights Posted on: August 21, 2019
The spruce beetle is the most significant mortality agent of spruce in western North America, and management options are limited. In cooperation with FHP partners, a novel combination of a beetle-produced pheromone (MCH) and compounds from a non-host (maple) tree (AKB) were shown to be repellent to spruce beetles. High-release rate MCH-AKB devices that are attached to live spruce can reduce spruce beetle attacks on individual trees and small groups of trees.

‘Chem herding’ to improve biological control of saltcedar (Tamarix spp.) in the Northern Rockies

Science Spotlights Posted on: August 08, 2019
Saltcedar (Tamarix spp.) refers to the complex of exotic invasive shrubs and trees (four species and their hybrids) now considered the third most prevalent woody riparian taxonomic group in the western United States. Defoliation by large multivoltine populations of the Northern tamarisk beetle Diorhabda carinulata has successfully reduced extensive saltcedar infestations in the southwestern United States. Behavioral manipulation of insects with semiochemicals such as aggregation pheromones can be used to intensify herbivory, even in the Northern Rockies where beetle population densities are inherently low, to the extent that the target weed species is negatively affected at a population level.

3-Methylcyclohex-2-en-1-one for area and individual tree protection against spruce beetle (Coleoptera: Curculionidae: Scolytinae) attack in the southern Rocky Mountains

Publications Posted on: September 25, 2017
We tested 3-methylcyclohex-2-en-1-one (MCH) and an Acer kairomone blend (AKB) as repellent semiochemicals for area and single tree protection to prevent spruce beetle (Dendroctonus rufipennis Kirby) attacks at locations in Utah and New Mexico.

Semiochemical repellents reduce spruce beetle infestations

Science Spotlights Posted on: August 23, 2017
The spruce beetle is the most significant mortality agent of spruce in western North America. Management options are limited but an effective semiochemical repellent could be economically and environmentally advantageous, compared to insecticide applications, for protection single trees and small stands.

The once and future forest: Consequences of mountain pine beetle treatment decisions

Publications Posted on: June 27, 2014
Entomologists and silviculturists have long recommended management of stand basal area and/or mean tree diameter to mitigate the risk of mountain pine beetle (MPB) (Dendroctonus ponderosae Hopkins) outbreaks while simultaneously reducing wildfire risk.

Area-wide application of verbenone-releasing flakes reduces mortality of whitebark pine Pinus albicaulis caused by the mountain pine beetle Dendroctonus ponderosae

Publications Posted on: September 26, 2012
DISRUPT Micro-Flake Verbenone Bark Beetle Anti-Aggregant flakes (Hercon Environmental, Inc., Emigsville, Pennsylvania) were applied in two large-scale tests to assess their efficacy for protecting whitebark pine Pinus albicaulis Engelm. from attack by mountain pine beetle Dendroctonus ponderosae Hopkins (Coleoptera: Scolytinae) (MPB). At two locations, five plots of equivalent size and stand structure served as untreated controls.

Cultivar preferences of ovipositing wheat stem sawflies as influenced by the amount of volatile attractant

Publications Posted on: July 06, 2009
The wheat stem sawfly, Cephus cinctus Norton, causes severe losses in wheat grown in the northern Great Plains. Much of the affected area is planted in monoculture with wheat, Triticum aestivum L., grown in large fields alternating yearly between crop and no-till fallow. The crop and fallow fields are adjacent.

Behavioural responses of wheat stem sawflies to wheat volatiles

Publications Posted on: January 16, 2009
1) Adult wheat stem sawflies Cephus cinctus, pests of cultivated cereals that also infests wild grasses, migrate into wheat fields where they oviposit in elongating, succulent stems. 2) Volatiles released by wheat plants at susceptible stages were analyzed to determine potential semiochemical compounds. Seven major compounds were identified and quantified.

Traps and attractants for wood-boring insects in ponderosa pine stands in the Black Hills, South Dakota

Publications Posted on: September 25, 2008
Recent large-scale wildfires have increased populations of wood-boring insects in the Black Hills of South Dakota. Because little is known about possible impacts of wood-boring insects in the Black Hills, land managers are interested in developing monitoring techniques such as flight trapping with semiochemical baits.

Comparison of naturally and synthetically baited spruce beetle trapping systems in the central Rocky Mountains

Publications Posted on: July 06, 2006
We compared naturally baited trapping systems to synthetically baited funnel traps and fallen trap trees for suppressing preoutbreak spruce beetle, Dendroctonus rufipennis Kirby, populations. Lures for the traps were fresh spruce (Picea spp.) bolts or bark sections, augmented by adding female spruce beetles to create secondary attraction.