Theodore W. Valenti
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View article: Critical review of chronic toxicity testing approaches with the saltwater mysid (<i>Americamysis bahia</i>) used in pesticide registration
Critical review of chronic toxicity testing approaches with the saltwater mysid (<i>Americamysis bahia</i>) used in pesticide registration Open
The United States Environmental Protection Agency (USEPA) has a conditional requirement for a chronic toxicity test with mysids (Americamysis bahia) for registration of pesticide products. Achieving performance acceptability criteria in co…
View article: Evaluating the Functional Equivalency of Test Organism Performance in Negative and Solvent Controls During Chronic Sediment Ecotoxicity Studies Based on US Environmental Protection Agency Guidance
Evaluating the Functional Equivalency of Test Organism Performance in Negative and Solvent Controls During Chronic Sediment Ecotoxicity Studies Based on US Environmental Protection Agency Guidance Open
The US Environmental Protection Agency (USEPA) considers sediment toxicity tests as conditional registration requirements for pesticides with soil Kd ≥50 L/kg-solid, Koc ≥1000 L/kg-organic carbon, or log Kow ≥3. The hydrophobicity of these…
View article: Integrating Exposure and Effect Distributions with the Ecotoxicity Risk Calculator: Case Studies with Crop Protection Products
Integrating Exposure and Effect Distributions with the Ecotoxicity Risk Calculator: Case Studies with Crop Protection Products Open
Risk curves describe the relationship between cumulative probability and magnitude of effect and thus express far more information than risk quotients. However, their adoption has remained limited in ecological risk assessment. Therefore, …
View article: Overcoming Challenges of Incorporating Higher Tier Data in Ecological Risk Assessments and Risk Management of Pesticides in the United States: Findings and Recommendations from the 2017 Workshop on Regulation and Innovation in Agriculture
Overcoming Challenges of Incorporating Higher Tier Data in Ecological Risk Assessments and Risk Management of Pesticides in the United States: Findings and Recommendations from the 2017 Workshop on Regulation and Innovation in Agriculture Open
Pesticide regulation requires regulatory authorities to assess the potential ecological risk of pesticides submitted for registration, and most risk assessment schemes use a tiered testing and assessment approach. Standardized ecotoxicity …
View article: Relative sensitivity of an amphipod <i>Hyalella azteca</i>, a midge <i>Chironomus dilutus</i>, and a unionid mussel <i>Lampsilis siliquoidea</i> to a toxic sediment
Relative sensitivity of an amphipod <i>Hyalella azteca</i>, a midge <i>Chironomus dilutus</i>, and a unionid mussel <i>Lampsilis siliquoidea</i> to a toxic sediment Open
The objective of the present study was to evaluate the relative sensitivity of test organisms in exposures to dilutions of a highly toxic sediment contaminated with metals and organic compounds. One dilution series was prepared using contr…