Collman, Sharon

Moths are stunningly beautiful and prevalent insects in Washington State and, through this publication, identifying them becomes much easier. ...

This scale insect attacks a variety of hosts in Washington, including fruit trees, roses, and cherrylaurel hedges. Authors discuss biology and control of this pest. Homeowner products are listed.

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Photographs and descriptions identify the white pine weevil, (Pissodes strobi), which is also known as the Sitka spruce weevil. Found throughout the western states, t ...

Full color photos and descriptive text will help you identify disease and insect symptoms on these popular landscape plants.

Phosphorus (P) is an essential plant nutrient, but it is also a potential pollutant. Phosphorus fertilization helps maintain healthy lawns growing in P-deficient soils, but P runoff into lakes and st ...