The Weed Science program, based out of the University of California Cooperative Extension- Napa County office, holds a wealth of weed related information and is a must visit if you are looking to learn more about control tactics or identification. You can also find some important links below:

Weed Resources

• Weed Research & Information Center (UC WeedRIC)
• Weed ID Tool
• Cal-IPC: California Invasive Plant Council
• Herbicide Symptoms - UC IPM
  • UC IPM Weed Photo Gallery
• Western Society of Weed Science
• Weed Science Society of America
• California Weed Science Society
• California Department of Pesticide Regulation
• California Department of Food and Agriculture Integrated Pest Control (IPC)
  • Encycloweedia

Weed ID Tool