Overview
In 1964, CDFW formed the Pesticide Investigations Unit to address ongoing effects of fish and wildlife from pesticide use based in the Wildlife Health Laboratory (WHL). The WHL investigates pesticide-related incidents, participates in the pesticide registration process, conducts monitoring studies, provides technical assistance and public education to protect fish and wildlife from adverse pesticide impacts. In 2022, nearly 200 million pounds of pesticide active ingredients are used in California.
Fish and Wildlife Loss Investigations
WHL investigates reports of fish and wildlife losses due to potential pesticide use in coordination with the appropriate County Agricultural Commissioner's Office. In the case of an illegal use, enforcement action may be taken by CDFW and the County Agricultural Commissioner's Office. WHL staff monitor potential anticoagulant rodenticide exposure in fish and wildlife.
Pesticide Registration
In California, pesticides are registered for use by the Department of Pesticide Regulation. As part of the California registration process, data regarding the efficacy and safety of pesticides is reviewed by the Pesticide Registration and Evaluation Committee (PREC) which can recommend restrictions to reduce or eliminate potential problems. As the custodian of fish and wildlife in California, CDFW serves on the PREC. This allows CDFW to review new pesticide uses and to request reevaluation of existing pesticide uses when unacceptable hazards to fish and wildlife have been demonstrated.
Continuing Education
In California, those holding licenses or certificates to handle, sell, or recommend pesticides are required to complete hours of continuing education classes. In this way, licensed pesticide users are kept informed of the latest information available and are able to use pesticides more safely. WHL personnel may give presentations at these classes describing causes of pesticide-related wildlife exposure and preventative actions.
For more information, contact:
Pesticide Investigations Coordinator, Ryan Bourbour, PhD
Ryan.Bourbour@wildlife.ca.gov | WHLab@wildlife.ca.gov