Humboldt-Del Norte

Tables of Pacific Madrone (Arbutus menziesii) symptoms, possible causes, and reference photos to aid in tree disease diagnosis.

Summary of Douglas-fir Engraver Beetle (Scolytus unispinosus), trees affected by them, management strategies, along with pests and pathogens with similar display of symptoms on trees

Humboldt-Del Norte 4-H forms, applications, and scholarships

Frequently asked questions regarding sudden oak death including: What is sudden oak death or SOD? What plants are host to Phytophthora ramorum? What are the symptoms of Phytophthora ramorum? Who do I contact to learn more about regulations? Who do I contact if I suspect sudden oak death on or near my home or…

The effect of sudden oak death on tanoaks and coast live oak trees.

Find food preservation tips for canning, freezing, dehydrating, and keeping food safe.

Summary of Douglas-fir Twig Weevil (Cylindrocopturus furnissi), trees affected by them, management strategies, along with pests and pathogens with similar display of symptoms on trees

Join 4-H in Humboldt County or Del Norte County. Learn how to get started and who to contact with questions.

Connect with Humboldt/Del Norte Livestock Advisor Jeff Stackhouse for information and support for local livestock and rangeland producers. Find resources on livestock, prescribed fire, drought, weeds, rangeland ecology, riparian, marketing, and more.

Herbicides and tree mortality.