Biocontrol Science and Technology (2019) 29, 405-409

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Paul D. Pratt, John C. Herr, Raymond I. Carruthers and Guillermo Cabrera Walsh (2019)
Complete development on Elodea canadensis (Hydrocharitaceae) eliminates Hydrellia egeriae (Diptera, Ephydridae) as a candidate biological control agent of Egeria densa (Hydrocharitaceae) in the U.S.A.
Biocontrol Science and Technology 29 (4), 405-409
Abstract: The leaf-mining fly Hydrellia egeriae Rodrigues-Junior (Diptera: Ephydridae) was evaluated under quarantine conditions as a candidate biological control agent of the invasive aquatic weed Egeria densa Planchon (Hydrocharitaceae) in California, U.S.A. The objective of this study was to test the fly's feeding preference for E. densa as compared to the North American native Elodea canadensis Michaux (Hydrocharitaceae), an important benchmark species. No choice testing revealed that H. egeriae can complete development on E. canadensis and choice testing indicated the fly presents little oviposition discrimination between E. densa and E. canadensis. It is concluded that the host range of H. egeriae is too broad for use as a biological control agent of E. densa in the U.S.A.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Paul D. Pratt, John C. Herr

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Elodea canadensis (weed) U.S.A. (SW)
Egeria densa (weed) U.S.A. (SW)
Hydrellia egeriae (weed bioagent) Elodea canadensis (weed)
Hydrellia egeriae (weed bioagent) Egeria densa (weed)