“Hydrilla Management in Florida: A Summary and Discussion of Issues Identified by Professionals with Future Management Recommendations”

Introduction | Document Title / Authors | Table of Contents | View as PDF (349KB)

June 15, 2005

Dear Reader,
We thank all of the professionals who participated in the Hydrilla Issues Workshop held in Gainesville, Florida in December 2004. This meeting was organized to identify and discuss, in light of conventional wisdom, the key issues associated with hydrilla management, with the hope that organizing this information would help future efforts to manage hydrilla in Florida. The attached final document entitled “Hydrilla Management in Florida: A Summary and Discussion of Issues Identified by Professionals with Future Management Recommendations” represents the final document where we compiled the issues, discussions, relative literature and put forward an initial set of recommendations. This document was reviewed by all of the participants (listed in Appendix I of the document) and the majority of the comments have been incorporated into the document. Based on all of the discussions and comments, recommendations were made for developing lake-specific management strategies and for identifying future research needs.

During the workshop and in compiling this final document, it was evident that there are many different ideas regarding hydrilla management in Florida. It was therefore important that the strengths and limitations of our current management options were clearly stated and we hope this document accomplished this task. We do not expect to receive unanimous agreement amongst readers of this document, but where we do, we feel aquatic plant managers can move ahead rapidly. When there is not unanimous agreement on key issues that came out of the workshop, we are looking to develop a push for research funding and projects.

One recurring issue identified in the workshop was the need to involve more of the Florida stakeholders involved in hydrilla management, including lay audiences. Unfortunately, this document was not written for a lay audience, because of its scientific nature and length. The content and length of this Summary reflects our desire to provide pertinent background information to strongly support the recommendations. However, the document will now be sent to the participants in the Hydrilla Workshop, who are all free to share it with any interested stakeholder and an electronic copy will be posted on the Florida LAKEWATCH web page (http://lakewatch.ifas.ufl.edu) for general readership. We hope our efforts will help with statewide efforts to manage hydrilla.

Sincerely,

Mark Hoyer1, Mike Netherland2, Mike Allen1, and Daniel Canfield Jr.1

1 Department of Fisheries and Aquatic Sciences
University of Florida/IFAS, Gainesville, FL

2 U.S. Army Engineer Research and Development Center, Vicksburg, MS and
Center for Aquatic and Invasive Plants, University of Florida/IFAS, Gainesville, FL


1 Hydrilla Management in Florida: A Summary and Discussion of Issues Identified by Professionals with Future Management Recommendations

 

Final Document
June 14, 2005
M. V. Hoyer
Department of Fisheries and Aquatic Sciences
Institute of Food and Agricultural Sciences
University of Florida
M. D. Netherland
U.S. Army Engineer Research and Development
Center, Vicksburg, MS
Center for Aquatic and Invasive Plants
University of Florida
M. S. Allen, and D. E. Canfield, Jr.
Department of Fisheries and Aquatic Sciences
Institute of Food and Agricultural Sciences
University of Florida
Funded by: Florida LAKEWATCH, Department of Fisheries and Aquatic Sciences, University of Florida/IFAS.


2 Table of Contents

The Situation-------------------------------------------------------------------------------------------------3
Introduction---------------------------------------------------------------------------------------------------4
Synopsis of Introductory Presentations-------------------------------------------------------------------5
“Hydrilla Management Before Fluridone”, by Dr. Bill Haller, UF/IFAS Center for Aquatic and Invasive Plants-----------------------------------------------------------------------5
“Recent Challenges and Current Viable Options for Hydrilla Management in
Florida”, by Dr. Mike Netherland, USA ERDC/Center for Aquatic and Invasive Plants
-5
“Current Florida DEP Management Strategies for Hydrilla in Florida”, by Jeff Schardt, FL Department of Environmental Protection----------------------------------------------------6
“Water Management Schedules and Hydrilla Management”, by Susan Sylvester,
U. S. Army Corps of Engineers, Jacksonville District
-----------------------------------------6
Summary of Presentations----------------------------------------------------------------------------------7
Critical Issues Identified in the Workshop----------------------------------------------------------------7
Integrated Plant Management---------------------------------------------------------------------7
Triploid Grass Carp--------------------------------------------------------------------------------11
Current and Future Chemical Management Practices for Hydrilla--------------------------14
Water Regulation Schedules and the Use of Fluridone---------------------------------------24
Wildlife and Fisheries Management-------------------------------------------------------------33
Florida Statute and Florida Administrative Code----------------------------------------------34
References---------------------------------------------------------------------------------------------------38
Appendix I - Workshop Participants---------------------------------------------------------------------43
Appendix II - Minutes and Notes from the Workshop--------------------------------------------44
Appendix III – Florida Statutes and Florida Administrative Codes--------------------------------51