1 / 10

Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress

Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress. Native to: Europe, Asia, and North Africa First documented in 1942, confirmed in 45 states Introduced by Aquarium trade Spread mainly by boating activity as well as naturally

mariko
Download Presentation

Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress

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. Eurasian Watermilfoil Myriophyllum spicatum By: Briana Betress

  2. Native to: Europe, Asia, and North Africa • First documented in 1942, confirmed in 45 states • Introduced by Aquarium trade • Spread mainly by boating activity as well as naturally • Habitat: Lakes, Ponds, Shallow Reservoirs, Low flow river and stream areas, brackish waters of protected tidal creeks and bays. • Especially abundant in areas of nutrient loading, intense plant management, or boat use. • Submersed, rooted, perennial herb • Whorled, finely divided leaves with leaflets in pairs of 14

  3. Why Eurasian Watermilfoil is Problematic • Ability to reproduce in fragments • High growth rate in a range of temperatures • Tolerant of a range of environmental conditions

  4. National Distribution

  5. Statewide Distribution

  6. Control Methods • Mechanical • Several cuts may be needed- like mowing your lawn • Dredging and rotavation can eliminate all plants • Mechanical harvesters are effective but costly • Chemical • May need to be repeated every 1-4 years • 2-4-D , used for dicots • Bio • Three taxa considered for use on Myriophyllum spicatum • Acentria ephemerella • Cricotopus myriophylli • Euhrychiopsis lecontei

  7. Biocontrols • Hydrilla tip mining midge- • Cricotopus myriophylli • Consumes meristem • Problems with mass rearing, and funding has slowed research • Milfoil Weevil- • Euhrychiopsis lecontei • Bores through stem, reducing buoyancy and carbohydrate storage capacity. • Pyralid Moth- Acentria ephemerella • Consumes meristem, stem, and leaves. • Unsure of host specificity

  8. Biocontrol- Milfoil Weevil • Larvae are stem miners • Insectivorous fish may be decreasing weevil populations • Euhrychiopsis lecontei • 3mm in length • Completes all life stages submersed Egg Larva Pupa Adult

  9. Any Questions? library.umf.maine.edu/plagiarism/credit2.html

  10. References • http://www.forestryimages.org/images/384x256/0002004.jpg • http://plants.usda.gov/java/profile?symbol=MYSP2 • library.umf.maine.edu/plagiarism/credit2.html • www.cnipm.org/images/Myriophyllum_spicatum.jpg • http://nas.er.usgs.gov/taxgroup/plants/docs/my_spica.html • http://www.hear.org/Pier/images/myspi12.jpg • http://fwcb.cfans.umn.edu/research/milfoil/milfoilbc/bcresearch.html • http://www.rcweeds.org/Weed_List/IMAG045.JPG

More Related