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Stressed trees show dieback

Browning or dieback is usually caused by weather-related stress, sometimes in combination with pests and diseases.

Mar 2018 | Article

The Columbia Root-Knot Nematode Problem

The Columbia root-knot nematode attacks potatoes and causes injury to tubers in the Columbia Basin of Oregon and Washington as well as other areas of the Pacific Northwest.

Jim Green | Apr 1981 | 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

Basic Entomology

Insects can be found in great numbers in every ecosystem on our planet except for the ocean. There are over a million different identified species of insects in the world, but only an estimated 31,000 identified species of...

Richard Little | Jan 2016 | Article