Genetically Engineered Mosquitoes Research Authorization Application

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This webpage was last updated on May 11, 2023

In May 2023, Oxitec voluntarily withdrew its research authorization application to test the use of genetically engineered mosquitoes in California. DPR did not issue a decision on the application. For more information on Oxitec’s withdrawal and future plans for research in California, see their letter, PDF.

The company applied for a research authorization from the department in March 2022 to release and study the use of genetically engineered Aedes aegypti mosquitoes to reduce the current Aedes aegypti mosquito population in Tulare County, California.

DPR must approve a research authorization application before an unregistered pesticide can be field tested in the state. There is no pending research authorization or active application for the study of genetically engineered mosquitoes in California at this time.

Where can I review Oxitec’s previously submitted research authorization application received by DPR?

The department has posted on its website the following documents related to Oxitec’s research authorization application. This research authorization application is no longer in review by the department.