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Use Caution When Irrigating Oaks and Madrones

Excessive summer irrigation of oak and madrone trees may promote fungal diseases such as the oak root fungus (aka armillaria root disease) and crown rot.

Jun 2018 | Article

Why are my trees dying?

Trees all over Oregon are displaying signs of poor health. People are quick to blame insects, but insects are rarely the underlying cause of the problem. Drought and other stressors can make trees vulnerable to pests and disease.

John Punches | Sep 2019 | Article

Wireworm

Information about the wireworm, or click beetle larva.

Jul 2018 | Article

What are those 'worms' in my firewood?

You may have encountered white, segmented “worms” or grubs when chopping firewood and wondered what they were. Common questions include, did they kill my tree? And are they a danger to other trees? The quick answers are no, and no.

Jun 2018 | Article

Entomology for Gardeners

Classification and names Phylum: Arthropoda Class: Insecta = Insects (Arachnida = Spiders) Order: The technical name of the orders describes the wings. For example: Coleoptera: “coleo” = sheath; “ptera” = wing; that is, a...

Jean R. Natter | Jan 2019 | Article