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Explanation of the new EPA freshwater invertebrate imidacloprid endpoints: Implications for hemlock woolly adelgid management

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Imidacloprid is an insecticide commonly used for hemlock woolly adelgid management. The Environmental Protection Agency (EPA) has recently released new aquatic endpoints. Often these numbers are misunderstood by the public. The purpose of this document is to provide guidance to federal and state employees, as well as concerned citizens, on the meaning of these new EPA values and how they relate to current knowledge of insecticide risk in hemlock systems.

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Forest Management
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