The California Department of Pesticide Regulation will host a virtual public workshop on Sept. 24 to discuss proposed mitigation measures for first- and second-generation anticoagulant rodenticides. The informal session will present DPR’s draft proposal and gather feedback from stakeholders.
The meeting marks a key step in DPR’s ongoing reevaluation of diphacinone, warfarin, chlorophacinone and SGARs. Under Assembly Bills 1322 and 2552, which passed in 2023 and 2024, most uses of these chemicals are prohibited until DPR adopts mitigation measures in consultation with the California Department of Fish and Wildlife.
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DPR has committed to completing scientific evaluation by late 2026, with rulemaking possibly concluding by 2028. The workshop will be the first opportunity for the public to comment on specific strategies under consideration, such as restricting use near wildlife habitat, requiring integrated pest management practices and limiting availability of certain products.
The workshop comes amid growing concern over the impacts of rodenticides on wildlife, particularly predatory species like mountain lions, owls and hawks that may consume poisoned rodents. Existing law already limits most nonagricultural uses of SGARs and FGARs.
DPR reaffirmed earlier this year that SGARs and diphacinone are top priorities in its pesticide reevaluation schedule.
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