1 / 19

Use of Hydrellia Flies as Biocontrol Agents for Management of Hydrilla

Introduction. Hydrilla verticillata Invasive

bernad
Download Presentation

Use of Hydrellia Flies as Biocontrol Agents for Management of Hydrilla

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Use of Hydrellia Flies as Biocontrol Agents for Management of Hydrilla Julie Nachtrieb, Michael Grodowitz, Chetta Owens, and Nathan Harms U.S. Army Engineer Research and Development Center (ERDC), Environmental Laboratory, Lewisville, TX

    2. Introduction mention fly life cycle and that larvae feed Larval flies feed on up to X leaves during the three instars. mention fly life cycle and that larvae feed Larval flies feed on up to X leaves during the three instars.

    3. Photosynthesis

    4. Biomass, Turions, and Tubers

    5. Hydrilla Biomass

    6. Turion Numbers

    7. Tuber Numbers

    8. Tuber Numbers

    9. Fragments Mention field observations that hydrilla with high levels of fly damage might fragment easilyMention field observations that hydrilla with high levels of fly damage might fragment easily

    10. Fragments

    11. Fragments

    12. Mass - rearing Part of the us army engineer research and development center in vicksburg, ms The laerf also includes mesocosms, greenhouses, etcPart of the us army engineer research and development center in vicksburg, ms The laerf also includes mesocosms, greenhouses, etc

    13. Mass - rearing

    14. Mass - rearing Say at end of slide……Just say increases in fly pops followed by hydrilla declines have been observed at several sitesSay at end of slide……Just say increases in fly pops followed by hydrilla declines have been observed at several sites

    15. Sheldon Lake, TX In 2002, ten years later, flies still detected. Pic is from 2004 fly damage and immatures and adult readily seenIn 2002, ten years later, flies still detected. Pic is from 2004 fly damage and immatures and adult readily seen

    16. Choke Canyon Reservoir, TX 2004 & 2005 robust hydrilla, topped out, very few signs of fly damage seen including adults or immatures Pic is 2006 flies spreading throughout lake2004 & 2005 robust hydrilla, topped out, very few signs of fly damage seen including adults or immatures Pic is 2006 flies spreading throughout lake

    17. Lake Seminole, FL Pic is 2006Pic is 2006

    18. Lake Conroe, TX This summer we will monitor monthly and try for early season releases againThis summer we will monitor monthly and try for early season releases again

    19. Conclusions

    20. Current Research

More Related