ABSTRACT
As with any assessment of the risks of pesticides to an environmental compartment, it is essential that adequate data of the appropriate type are available in order to inform decision-making. It is, however, often the case that an ecotoxicological study will not provide all the information necessary to answer a risk assessment issue because either it has been designed in response to a different question or it completes only one piece of the jigsaw puzzle. The questions below (which can be applied to the case studies in this chapter) are general questions that can be asked when a risk assessment is conducted for aquatic macrophytes, in order to assess whether sufficient and appropriate information is available.
