Biological agent type
root/defoliating flea beetle
Plant species attacked
leafy spurge (Euphorbia esula)
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Image 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
Leaves and roots.
Mode of attack
Adults feed on the leaves reducing a plant's photosynthetic production of sugars for the root. The larvae feed on the root hairs and young roots and reduce the plant's ability to take up moisture and nutrients.
Destructive stage
Adult and larval-internal.
Collection and release information
This bio-agent is limited in number at this time. Consult with ODA for availability for your area.
History in Oregon
In 1993, two black species, Apthona czwalinae and Aphona lacertosa were released. Both were recovered in 1994. These two species seem to prefer more moist sites and have reduced leafy spurge at a number of sites in eastern Oregon. Both species, particularly Apthona lacertosa , which usually accounts for >90% of most releases, have been heavily redistributed in eastern and central Oregon.
Release status in Oregon
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