The June 2021 heat wave caused significant damage to trees in Oregon. Learn some key findings on causes, types of damage, physiological "thermotolerance" of trees, and possible forest management implications.
Dive into a case study on thinning in mature Douglas-fir stands. Nearly all the trees in the study responded with increased growth and improved stress resistance.
Sitka spruce is among the world's fast-growing trees and the largest of the world's spruces. It's a valuable commercial timber. Its range extends from Alaska to northern California, but it faces unique problems ...
Learn how to control insects, weeds and disease during each stage of hazelnut growth. View the app version View diseases, pests and products by crop stage on a web-based app. Try the app
Nik Wiman, Jay W. Pscheidt, Marcelo Moretti |
Apr 2023 |
Extension Catalog publicationPeer reviewed (Orange level)
Shore pine is a subspecies of lodgepole pine that inhabits the coastal strip in Oregon. Insect pests, diseases, and nonbiological (abiotic) factors may have an impact on growth, visual appearance, and productivity ...
Retaining walls are popular features in commercial and home landscaping projects. They can be self-installed, making them very cost efficient. The following is a do-it-yourself guide to installing a retaining wall using a designed block system.
Oregon State Extension Service and other agencies are working together to help landowners recover from wildfires. The effort includes assessing reforestation needs, acquiring seedlings and facilitating restoration.
Fires and ice storms in recent years have done serious damage to young forest stands in the Willamette Valley. Without much salvageable timber, landowners must decide how to restore the stands. Here are some options.
Onion growers in Treasure Valley have faced difficulties in controlling thrips. One of the problems is resistance to commonly used insecticides. Researchers conducted tests to find the most effective insecticides.
After learning hands-on about pplanting Douglas-fir seedlings, students took them home to plant with their families, as well as an instruction cards with information about the state tree and Oregon’s forests.