Tree Care

Featured Resources

Article

Why Are My Trees Dying?

Trees all over Douglas County are displaying signs of poor health. Most people are quick to blame insects, but while insects are almost always present in sick trees, they are rarely the underlying cause of the problem.

By John Punches

Article

Douglas Fir Insect Pests

The most common insects in the drought stressed or dead Douglas-fir.

Article

Diagnosis Table - Douglas Fir, Oak, Pine

Diagnosis tables for Douglas fir, oak, and pine trees.

Latest Resources

OSU Extension Catalog

How do I know if my tree is healthy?

Are you worried about a tree on your property? Oregon State University Extension Service Foresters help you learn about individual tree needs, how to detect and describe symptoms of poor tree health, and to decide whether you need to take further action.

By Dave Shaw, Nicole Strong

Online Resource

NC-140 Regional Rootstock Research Project

This project seeks to enhance economically and environmentally sustainable practices in temperate fruit production by focusing on rootstocks.

Newsletter

Life on the Dry Side Forestry Newsletter

Serving land managers and owners east of the Cascades.

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Latest News

News Story

In droughty Klamath Falls, watering trees may help defend against bronze birch borer

Jun 29, 2017

Symptoms of the voracious insect appear for the first time in Klamath Falls

By Gail Wells

All News

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Urban Forestry

Upcoming Events

Eugene, OR

Growing Trees for Optimal Wood Quality

Wed, Jan 9, 2019 6:30 pm - 8:30 pm

Learn how activities like pruning and stand density management impact wood quality.

Meet Our Experts

John Punches

Have a Question? Ask an Expert!

Ask an Expert is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.

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My monkey puzzle tree has me puzzled, any ideas?

I have a Monkey Puzzle tree that's 20+ ft. and should be at least 40 years old. The lower limbs have been drying out and turning brown. Nothing unusual this year as in years past, have not disturbed it.

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