Some Costa Mesa residents are being notified citrus trees in their yards may need to be sprayed with insecticide or removed, after state agriculture officials confirmed the detection of harmful ...

The California Department of Food and Agriculture Thursday declared a new citrus quarantine in Valley Center after detecting the citrus tree disease known as Huanglongbing — or citrus greening — in ...

Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in Menlo Park discuss a tree-related topic from general care and planting tips to how ...