UNIVERSITY OF WISCONSIN-MADISON: Field Test on the Effectiveness of Milfoil Weevil for Controlling EWM in Northern Lakes

Purpose

UW-Madison Center for Limnology is sponsoring an ACEI Research and Demonstration grant to study seven lakes in northern WI. Project partners include Enviroscience, Onterra, County AIS Coordinators, WDNR, and lake association volunteers. The project will focus on assessing the effectiveness of weevil augmentation at controlling EWM. If successful, information gained from this project will be used to assist direction of other EWM reduction projects with weevil augmentation. Project activities include: 1) Mapping and pre/post treatment surveys of EWM beds; 2) Hire a graduate and undergraduate student each summer; 3) Assess density, collect, propagate and stock weevils; 4) Stock seven lake for three summers (2012-2014); 5) Conduct PI surveys during summer of 2015; 6) Data analysis; 7) Public education and outreach \2013 presentations at WI Lakes Convention, Midwest Invasives Conf, NALMS, and other appropriate requested conferences. Project results will be published in an appropriate scientific journal; 8) Annual summaries and a final report. Project deliverables include: 1) Hired students; 2) Aquatic plant survey and weevil data and maps; 3) Aquatic plant vouchers; 4) Public education and outreach \2013 informational materials, presentations, media outreach, web-based materials, K-12 education, and undergraduate education; 5) Annual summaries and final report. Specific conditions for this project: 1) Scientific collectors permit will be needed for weevil collection; 2) Collected weevils for propagation will need approval by Lakes Management Coordinator; 3) Annual summaries and final report need Dept review and approval. WDNR Lakes Management Coordinator will be provided with an electronic (pdf or word) copy of annual summaries, final report, all education and outreach materials, and all data and maps from project, and aquatic plant vouchers.

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Aquatic Invasives Grant
Aquatic Invasives Research Grant
ACEI-122-12
2012
Complete
 
Reports and Documents
This report consists of three chapters, structured as papers for publication, followed by appendices showing detailed data. The first chapter describes the methods and results from the field experiment (2012-15); the second chapter describes an extended survey of additional lakes for background densities of the milfoil weevil (2014-15); and the third chapter describes weevil densities reported in the literature and how sampling methods can create biases for estimating density.
The main study is being conducted in 16 study beds in 4 lakes, where 8 EWM beds (2 in each study lake) were augmented with weevils in 2013 and the other 8 beds were left as controls. Each of these beds were sampled twice each summer (June, August) over a 3-year period (2013-15).
Title: Trophic interactions and the efficacy of the milfoil weevil (Euhrychipsis lecontei) for the biocontrol of Eurasian water-milfoil (Myriophyllum spicatum) in Wisconsin lakes.
The main study is being conducted in 16 study beds in 4 lakes, where 8 EWM beds (2 in each study lake) were augmented with weevils in 2013 and the other 8 beds were left as controls. Each of these beds were sampled twice each summer (June, August) over a 3-year period (2013-15).
The main study is being conducted in 16 study beds in 4 lakes (Fig. 1), where 8 EWM beds were augmented with weevils in 2013 and the other 8 beds were left as controls. Each of these beds is being sampled twice each summer (June, August) over a 3-year period (2013-15).
Grant to Susan Knight and John Havel (2012-2015): A field test on the effectiveness of milfoil weevil for controlling Eurasian water-milfoil in northern lakes. (Grant number ACE-122-12)
Grant to Susan Knight and John Havel (2012-2015): A field test on the effectiveness of milfoil weevil for controlling Eurasian water-milfoil in northern lakes. (Grant number ACE-122-12)
Grant to Susan Knight and John Havel (2012-2015): A field test on the effectiveness of milfoil weevil for controlling Eurasian watermilfoil in northern lakes. (Grant number ACE-122-12)
Grant to Susan Knight and John Havel (2012-2015): A field test on the effectiveness of milfoil weevil for controlling Eurasian watermilfoil in northern lakes. (Grant number ACE-122-12)
 
Activities & Recommendations
Grant Awarded
Map Invasive Species
Map Plant Communities
Monitor Pre and Post Treatment
Aquatic Invasives Research
UNIVERSITY OF WISCONSIN-MADISON: Field Test on the Effectiveness of Milfoil Weevil for Controlling EWM in Northern Lakes Assess density, collect, propagate and stock milfoil weevils
Aquatic Plant Monitoring or Survey
PI Surveys
Data analysis, report production
Information and Education
Informational Meetings
Presentations at WI Lakes Convention, Midwest Invasives Conference, NALMS, etc.
Project Deliverable
publish results in scientific journal
Project Deliverable
Annual Summaries
Project Deliverable
Final Report