* The California Department of Food and Agriculture (CDFA) is the state agency responsible for protecting California's agricultural resources from pests and diseases. The CDFA works with a variety of partners, including local governments, private landowners, and non-profit organizations, to monitor and control pests and diseases that threaten trees in Southern California.

* The University of California Agriculture and Natural Resources (UC ANR) is a statewide network of researchers and educators who are working to find solutions to agricultural challenges, including pests and diseases. UC ANR works with the CDFA and other partners to develop and implement pest management strategies for trees in Southern California.

* The Los Angeles County Department of Agricultural Commissioner/Weights and Measures (Ag Commissioner) is responsible for protecting the agricultural resources of Los Angeles County. The Ag Commissioner works with the CDFA and other partners to monitor and control pests and diseases that threaten trees in Los Angeles County.

* The Tree People is a non-profit organization that plants and cares for trees in Los Angeles County. The Tree People works with the Ag Commissioner and other partners to provide education and outreach about pests and diseases that threaten trees in Los Angeles County.

* The California Urban Forests Council (CUFC) is a coalition of organizations that work to promote and protect urban forests in California. The CUFC works with the CDFA, UC ANR, the Ag Commissioner, the Tree People, and other partners to advocate for policies and programs that support the health of trees in Southern California.

Together, these groups are working to slow the spread of pests and diseases and protect the trees of Southern California.