Imperial Wildlife Area Tamarisk Biological Control


SCH Number
Public Agency
California Department of Fish and Wildlife, Environmental Services Division (CDFW)
Document Title
Imperial Wildlife Area Tamarisk Biological Control
Document Type
NOE - Notice of Exemption
Document Description
Northern tamarisk leaf beetles (Diorhabda carinulata) will be released on invasive exotic tamarisk trees (Tamarix ramossissima) that are reducing the quality of wildlife habitat at the wildlife area. The beetles exclusively feed and reproduce on tamarisk. Tamarisk initially re-grows after defoliation, but gradually dies back. This will allow native riparian plants like willows and cottonwoods to re-colonize the ecosystem.

Contact Information

Joel Trumbo
Agency Name
California Department of Fish and Wildlife, Lands Program
Contact Types
Lead/Public Agency


Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
The tamarisk beetle poses no risk to native plant species. Current populations of native tree species and adequate to provide for the habitat needs of wildlife species even while tamarisk populations are reduced. Native trees may also be planted to further increase native plant diversity and habitat quality.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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