Exotic and invasive pests threaten California's natural environments, agricultural production, structures, landscapes and gardens.  Exotic pests are organisms introduced into an area beyond their natural range and become pests in the new environment. Most introductions have been unintentional and accidental, but some invasive plant problems began as ornamental plants for sale.

Invasive species prevention is the most economical and desirable approach to invasive species management. However, when prevention isn't successful, pesticides may be needed to eradicate or control invasive species.

What are some problematic invasive species?

Aedes mosquitoes can transmit...