Tree Pest and Disease Alerts

Golden Spotted Oak Borer Infestation

The goldspotted oak borer is a pest new to southern California that can kill mature trees. This insect aggressively attacks three oak species with repeat attacks occurring over several years. It is contributing to the on-going oak tree mortality occurring on federal, state, private, and Native American lands in San Diego County and has the potential to kill native oak species throughout California.

Learn more from the University of California Agriculture and Natural Resources.
 

Asian Citrus Psyllid

The California Department of Food and Agriculture (CDFA) has placed all of Los Angeles County under a quarantine regulating the movement of citrus and closely-related plants. The quarantine follows the detection of several dozen Asian citrus psyllids in Los Angeles’ Echo Park area. Federal, state and county officials are working with growers to implement the quarantine and hopefully prevent the spread of the Asian citrus psyllid in California.

Learn more from the CDFA.