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Aphthona flava
Biological agent type
flea beetle
 
Plant species attacked
leafy spurge (Euphorbia esula)
 
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Aphthona flava adult
Aphthona flava larvae


Images by Eric Coombs,
Oregon Department of Agriculture.
For more images of bio agent click here.


If images are downloaded and used from the ODA web site please be sure to credit the photographer.

Impact on target plant 
The larvae of the flea beetles feed on the roots and buds causing plant mortality. Adults feed on leaves and flowers, and can cause severe defoliation during outbreaks.

Collection and release
Collect adults with sweep net in June-July. Release 500+.

Distribution
This beetle has been released in 9 counties and established in 6.

History and comments
Three flea beetles, Aphthona cyparissiae, Aphthona flava, and Aphthona nigriscutis were introduced in 1989. A. nigriscutis and A. cyparissiae are well established, but have been slow to increase and spread. A. flava established, but only occurs in low numbers at several sites. This species seems to do better in mountain infestations where sagebrush also occurs.

Links:
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ODA Bio Control Program
Bioagent History and Decision Making Chart