|
|
Department of Pesticide Regulation Paul E. Helliker, Director 830 K Street - Sacramento, California 95814-3510 - www.cdpr.ca.gov
|
|
|
NOTICE OF PROPOSED REEVALUATION Pursuant to Articles 8 and 12 (Title 3) of the California Code of Regulations, the Director of the Department
of Pesticide Regulation (DPR) notices his decision to initiate a reevaluation of pesticide products. Interested
persons may comment on this decision up to and including the date shown on the top-right corner of this notice
to the Department of Pesticide Regulation, Pesticide Registration Branch, 830 K Street, Sacramento, California
95814-3510
BASIS OF REEVALUATION Brodifacoum is registered in California for the control of Norway rats, roof rats, and house mice in residential, industrial, commercial, agricultural, and public buildings. Registrants formulate the product with a grain-based bait in pellets, mini-pellets, and wax blocks. DPR placed the pesticide active ingredient brodifacoum into reevaluation at the request of the Department of Fish and Game (DFG). DFG expressed concern that California's wildlife are exposed and adversely affected by currently registered uses of the anticoagulant rodenticide brodifacoum. Since 1994, DFG's Pesticide Investigations Unit has investigated 58 cases of possible wildlife exposure to anticoagulant rodenticides. Residues of anticoagulant rodenticides were detected in 38 birds and mammals, and residues of brodifacoum were identified in 31 birds and mammals, accounting for 82 percent of the anticoagulant exposures. Of the 31 individuals in which residues of brodifacoum were detected, clinical signs of anticoagulant poisoning were observed in 10 to 20 percent. Eleven of the animals also carried residues of at least one other anticoagulant rodenticide in conjunction with brodifacoum. Because wildlife typically retreat to dens, burrows, or unobtrusive roosts in the final stages of anticoagulant poisoning, exposure of non-target wildlife to this compound may be more extensive. Most of the birds and mammals exposed to brodifacoum were recovered from areas adjacent to urban development in Santa Clara, Los Angeles, Ventura, Orange, San Benito, Alameda, and Contra Costa counties. DPR and DFG plan to identify the pathways that result in wildlife exposure to brodifacoum and curtail exposure through effective mitigation measures. For information, please contact Ms. Ann Prichard, Senior Environmental Research Scientist, Pesticide Registration Branch, by e-mail at aprichard@cdpr.ca.gov or by telephone at (916) 324-3931. |
|
original signed by Barry Cortez |
12-30-99 |
| Barry Cortez, Chief Pesticide Registration Branch (916) 445-4377 |
Date |
California Environmental Protection Agency