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Various working groups are formed to help fill in informational voids identified for plant ecotoxicology and risk assessment. Members are encouraged to actively participate in working groups related to their interests. Working groups generally are active until their goals are reached. Below are descriptions of current and past working group activities, along with links to products produced by each. Additional Plants AG working groups will be established in the future when new information (e.g. opinions, guidance doc, reviews) for specific questions is needed by stakeholders.

Glyceria Ring-test Working Group (New)

This is a newly formed advisory group, focusing on ring-testing and fine-tuning a test guideline for the emergent macrophyte, Glyceria.  Activities within this group will formally begin at the 2014 SETAC Europe meeting in Basel.  If you would like to participate in this working group, or for more information please contact Dr. Jo Davies (jo.davies@syngenta.com). 

 Myriophyllum Working Group (Active)

This working group originated from the "Aquatic Macrophyte Risk Assessment for Pesticides” (AMRAP) workshop held at the 2008 SETAC Europe meetings in Wageningen, Netherlands. This group’s primary focus is to provide guidance on the development of a toxicity test using a non-Lemna (non-monocotyledonous) -based aquatic macrophyte species. Concern exists over the sensitivity of Lemna species for some pesticides or other contaminants that may specifically target dicotyledonous plant processes.

A draft test guidance document (available below) for a test using Myriophyllum sp. in a water /sediment system was developed and evaluated.  The ring-tested draft Myriophyllum test guideline has been submitted to the OECD for evaluation. The draft will be updated based on comments received.

For more information on the working group please contact the co-chairs, Dr. Jo Davies (jo.davies@syngenta.com) or Dr. Margit Dollinger (margit.dollinger@bayer.com). Former Chair: Peter Dohmen (BASF) with support from Johanna Kubitza (BASF).

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In addition to the work on this water-sediment test system, there is also an initiative by the Federal Environment Agency of Germany (UBA) to develop a water only test system.

Species Sensitivity Distribution (SSD) Working Group (Completed)

This working group originated from the "Aquatic Macrophyte Risk Assessment for Pesticides” (AMRAP) workshop held at the 2008 SETAC Europe meetings in Wageningen, Netherlands. Their primary focus was to determine the relative sensitivity of Lemna species to other aquatic macrophyte species. Lemna species are the most common surrogate aquatic plants used for aquatic macrophyte risk assessment, but little is known about their sensitivity relative to other aquatic macrophytes.

This working group developed a unique database with existing toxicity data for macrophytes and a relatively diverse array of pesticides having different modes-of-action (see AMRAP book). Chemical modes-of-action included inhibition of amino acid synthesis, auxin simulation, inhibition of cell division or elongation, inhibition of fungal respiration, inhibition of multiple biosynthesis pathways, and inhibition of photosynthesis. Species sensitivity distributions were developed for each compound using the available toxicity data and comparisons were made between Lemna and other species. For a more refined review and analysis of the data a consortium of several partners was established to allow funding of a consultant.

This project was recently completed. The final report is available below and a manuscript is currently being prepared for publication in SETAC’s IEAM journal.

For more information on this working group please contact the chair, Dr. Stefania Loutseti (Stephania.Loutseti@grc.dupont.com).

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