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Animals, diseases, and invasive plants threaten California's natural areas just like they cause problems in homes, gardens, and agricultural production. This page contains links to articles, fact sheets, and other information prepared by UC scientists on topics related to pests in natural areas.
Insects & Other Arthropods
Asian longhorned beetle
- Pest alert from Western IPM Center
- News: Collective effort produces Asian longhorned beetle information
Bagrada bug
Bark beetles
California oakworm
Eucalyptus longhorned borers
Goldspotted oak borer
- Goldspotted Oak Borer
- Goldspotted Oak Borer Field Identification Guide
- News: Don't Move Oak Wood in San Diego County!
- Web site: Goldspotted oak borer
- Fact sheet : Goldspotted oak borer, a new threat to oaks in Southern California
Grasshoppers
Mosquitoes
Oak pit scales
Obscure scale
- Success story: Biological control of an exotic oak pest
Pitch moths
Redhaired bark beetle
- News: Research findings shed light on new urban pest of pine trees
- Fact sheet: The redhaired pine bark beetle, Hylurgus ligniperda fabricius
Sycamore scale
Ticks
Walnut twig beetle
- Thousand cankers disease and walnut twig beetles in California
- Field Identification Guide: Walnut Twig Beetle and Thousand Cankers Disease
- Quick Guide: Installing and Maintaining Walnut Twig Beetle Pheromone-baited Traps
- Detecting and Identifying the Walnut Twig Beetle: Monitoring Guidelines
- Video: Installing Walnut Twig Beetle Traps
- Video: Maintaining Walnut Twig Beetle Traps
Wood wasps and horntails
Plant Diseases
Pitch canker
- Frequently asked questions on pitch canker
- Pitch canker
- News: Douglas-fir trees are cunning carriers of pitch canker disease
Pierce's disease
- Web site: Xylella fastidiosa
Sudden oak death
- Sudden Oak Death
- Web site: Sudden Oak Death from UCCE Sonoma
- Success story: UC a leader in the fight against sudden oak death
- Web site: Sudden oak death from the California Oak Mortality Task Force
Thousand cankers disease of walnuts
Wood decay fungi
Weeds & Other Unwanted Plants
Barb goatgrass
Brooms
Burning & stinging nettles
Dodder
Eurasian watermilfoil
Invasive plants
- Invasive plants
- Web site: California Invasive Plant Inventory from California Invasive Plant Council
- Exotic pest plants
- Herbicide resistance: definition and management strategies
- Fact sheet: Invasive plants and wildfires in southern California
- Web site: UC Weed Research and Information Center
- Web site: Invasive weed management from UCCE Central Sierra
- Web site: Invasive species from UCCE Lake County
- Web site: Invasive species from UCCE Los Angeles
- Book: Weeds of California and Other Western States
- CD: Broadleaf weed identification
- CD: Grass weed identification
Giant reed
Medusahead
- Success story: Controlling medusahead with intensive grazing
Mistletoe
Perennial pepperweed
Plantains
Poison hemlock
Poison oak
Puncturevine
Russian thistle
Sahara mustard
Stinknet
Wild blackberries
Woody invaders
Yellow starthistle
Aquatic Invasives
Crustaceans, mollusks, worms, and fish
Hull-borne invasive species
Invasive aquatic plants
- Web site: UC Weed Research and Information Center
- Farm Pond Management from UCCE Sonoma.
- Invasive species from UCCE Lake County
- Book: Aquatic and Riparian Weeds of the West
- Book: Aquatic Pest Control (Pesticide Application Compendium Volume 5)
Mosquitoes
New Zealand mudsnail
- New Zealand mudsnail research and extension from UCCE
- Invasive species from UCCE Lake County
Quagga and zebra mussels
- Driessenid mussel research and extension from UCCE
- Invasive species from UCCE Lake County