Biological agent type
root borring beetle
Plant species attacked
St. Johnswort (Hypericum perforatum)
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Images by Eric Coombs, Oregon Department of Agriculture.
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If images are downloaded and used from the ODA web site please be sure to credit the photographer.
Site of attack
Stems and roots.
Mode of attack
The larvae bore into the root and lower stems, and can cause plant mortality.
Destructive stage
Larval-internal.
Collection and release information
Limited in distribution at this time. Consult with ODA for availability for your area.
History in Oregon
The root-boring beetle Agrilus hyperici was introduced in Marion County in 1986, and failed to establish. Now it occurs in the eastern half of Wallowa County where it spread naturally from populations in Idaho and Washington. The first release of adults collected in Oregon was made in Umatilla County in 1992, which were recovered in 1994.
Release status in Oregon
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