Research in Tree Fruits and Nuts

Tree fruit and nut research programs at Oregon State University focus on six major areas: breeding and genetics, entomology and pest management, fruit pathology, postharvest handling and physiology, production systems, and weed management. To learn more about the tree fruit and nut research programs carried out by OSU faculty, and to find contact information for project leaders, click on the program links below.


Shawn Mehlenbacher - hazelnut breeding and genetics.

Entomology/Pest Management

Rick Hilton - pear pest management

Ramesh Sagili - honey bee biology

Vaughn Walton - hazelnut pest management


Ken Johnson - fire blight management

Jay Pscheidt - apple, cherry and pear disease management


Postharvest Handling/Physiology


Production Systems

Steve Castagnoli - pear pollinizers

Clive Kaiser - apple and cherry nutrition, PGRs

Lynn Long - cherry cultivars, rootstocks, systems


Weed Management

Ed Peachey - Orchard weed management