Eradication & Control Information Sheets

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These materials are provided for educational purposes only. They are intended to provide a general overview of what is required for implementing tactics to eradicate and control aquatic invasive species (AIS). Although prevention is the best approach, it also is important to be prepared and respond quickly to new infestations and to reduce risks posed by existing infestations. No work should be conducted without first consulting the California Department of Fish and Wildlife and the Regional Water Quality Control Board or, if in another state, the lead local resource management and water quality agencies for the aquatic invasive species you are interested in managing. Consult the California Department of Pesticide Regulation or corresponding agency in another state before applying chemical tactics.

The Quagga and Zebra Mussel Eradication and Control Tactic Information Sheet Series is intended to assist water managers and others interested in:

  1. Reducing existing aquatic pest populations, and/or
  2. Preparing for action against newly detected aquatic pest populations in lakes, reservoirs and irrigation canals (not in facilities or associated infrastructure).

The sheets are based on the assumption that a water body is at risk from an aquatic pest and that action is, or some day will be, required.* The activities described in the series complement ongoing preventative measures and can assist with development of rapid response plans. Such efforts are critical for minimizing impacts from, and the potential spread of, aquatic invasive species (AIS) also referred to here as aquatic pests.

The educational series includes six information sheets:

  • Introduction
  • Manual & Mechanical Removal
  • Oxygen Deprivation
  • Chemical Application
  • Emerging Technologies
  • Permitting & Regulatory Processes
  • Technical Report - all information sheets compiled into one document
  • Each sheet has a different focus, but together they provide an overview of steps for eradicating and controlling aquatic pests. Website addresses are hyperlinked within the text of each document, as well as cited in full at the end of each information sheet.


Series Details

Three types of information sheets are included in this series:

Introduction Sheet. The series begins with an Introduction that describes the intent of the information sheet series, general concepts of eradication and control, and tips for developing a management strategy including the importance of taking a proactive approach and utilizing the integrated pest management (IPM) approach. Practical steps also are highlighted, as well as potential funding sources.

Pennsylvania State University 2012. Design adapted by M. Lande, UC ANR, Cooperative Extension.

Tactical Information Sheets. Four of the information sheets provide details about implementing specific eradication and control tactics. The first three sheets are Manual & Mechanical Removal; Oxygen Deprivation and Chemical Application. Each of these sheets outlines a general description of the tactic, information on situations for which the tactic is most appropriate, an overview of steps to be taken prior to and when implementing the tactic, costs, equipment, and staffing considerations associated with the tactic, and examples of the tactic being used successfully to eradicate or control an aquatic pest. The fourth tactical information sheet, Emerging Technologies, covers technologies that may prove useful in future aquatic pest management, including the biocide Zequanox®, fish biocontrol, pulse pressure technology, and pH manipulation. As these emerging technologies are still in the research phase, we have provided links to websites where you can access up-to-date information.

Permitting & Regulatory Processes Sheet. We conclude the series by briefly describing regulatory and permitting processes required for implementing eradication and control measures for aquatic invasive species. Such activities are highly dependent on the specific situation and the location where the activities will occur. Thus, instead of a comprehensive list, we provide examples of permits and approvals that have been required for previous eradication and control efforts.

We hope this information will assist lake managers and others with managing aquatic invasive species.

*Risks posed by an aquatic pest species are often evaluated in terms of its tolerance for a range of environmental parameters that occur in a given water system, for example temperature, dissolved oxygen, pH and mineral content. Such “Risk Assessments” can be useful predictive tools, yet they should not be the only information used to determine whether actions will be taken. Organisms continually adapt to different conditions. Further, complex interactions among the required tolerances of organisms often make it difficult to pinpoint the exact environmental conditions that may or may not support a population.