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Exotic Wood-Boring Insect (EWBI) Surveys
Target Orders: Wood boring insects in the Coleoptera, Hymenoptera, and Lepidoptera.

Target Families: Buprestidae, Cerambycidae, Curculionidae (Platypodinae and Scolytinae); Siricidae and Xiphydriidae; Cossidae and Sesiidae.

bark beetle
Lindgren funnel trapbark beetle

Survey Objectives: To monitor for exotic wood boring insects so they can be detected before establishment or dispersal. Each year ODA places from 100 to 400 Lindgren funnel traps across the state at high-risk sites. For some wood borers, effective traps and lures are not available. For these species, such as the Asian longhorned beetle, visual inspections of trees are performed.
Survey Technique: Lindgren funnel traps (see image above and below) are placed at high-risk sites across the state. A Lindgren funnel trap consists of a series of black plastic funnels with a collection cup at the bottom that is suspended from a metal stake. Depending on the species or group of insects targeted, different types of lures will be used.
checking Lindgren trap
Checking a Lindgren funnel trap.
Trap Placement: Traps are placed near the preferred host plants of the target insects at high risk sites such as warehouses and businesses importing commodities with solid wood packing material (including crating, dunnage, pallets, etc.), mills importing raw wood products, wood recyclers, port and industrial areas, and urban forests. The traps may be placed at private residences, roadsides, golf courses, shipping facilities, airports, nurseries, etc. Traps are typically deployed during spring and fall, although traps targeting specific species are deployed throughout the year based upon its life history (i.e., February through late May for pine shoot beetle, July through October for European wood wasp).
Trap Servicing: Traps may be serviced as frequently as every two weeks by an entomologist or insect survey technician.

Identification of Specimens: One of the challenges of this project is that there are hundreds, perhaps thousands, of potential target species throughout the world. In order to confidently ascertain whether a given specimen represents a possible exotic species, all wood boring insects captured must be identified. Considering that one trap in a two-week sampling period may collect as many as 4,000 specimens of target insects amid possibly hundreds of thousands of non-target insect specimens, this can present a formidable task. Depending upon the specific program and its extent, over a hundred thousand target specimens have been collected and identified in a single season.
What if Detected:Typically, after detection, a delimitation will be performed. A delimitation consists of putting an increased number of traps our around the original detection at specific densities in order to get a better idea of the distribution of the introduced pest. If the pest is deemed a risk for establishment, then an eradication may be performed.
Survey Results: After the end of each season survey results are published in the Plant Division Annual Report.
Photo Credits:
bark beetle photos: Steve Valley, Oregon Dept. of Agriculture
trap diagram: Josh Vlach, Oregon Dept. of Agriculture