Alexander Gorman

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Content by Alexander Gorman

Oregon ash: Insects, pathogens and tree health

Oregon ash grows along the streams and wetlands of western Oregon and Northern California, where it provides important wildlife habitat. But these trees are threatened by the emerald ash borer, an insect pest that...

David C. Shaw, Jay W. Pscheidt, Alexander Gorman | Jan 2023 | OSU Extension Catalog

What to do about emerald ash borer: Recommendations for tree protection in EAB-infested areas

Learn how to protect trees from emerald ash borer in areas where the pest has become established in Oregon. This guide is for residential and professional landowners and land managers in urban and natural areas where the pest has been detected.

Alexander Gorman, Chris Hedstrom, Karen Ripley, Wyatt Williams, Christine Buhl, Scott Altenhoff, Chris Benemann, Jim Gersbach, Max Ragozzino, Cody Holthouse, Angie Ambourn | Dec 2022 | OSU Extension Catalog

Mysterious insects attacking my oak trees?

P: I live in Beaverton, Oregon. All of the oak leaves seem to be turning brown and falling early this year. The backs of all the leaves falling have little black spots all over them and I see thousands of small bug ...

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