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Predicting and Managing Gray Mold Rot of Pear in Oregon

This publication describes gray mold disease symptoms and the disease cycle and outlines a model that can help pear packers predict the relative risk of gray mold development in stored fruit before the fruit is placed in cold storage.

Robert A. Spotts, Steve Castagnoli | Jan 2010 | Extension Catalog publication Peer reviewed (Orange level)

Grapevine trunk diseases in Oregon

Many different organisms can lead to grapevine trunk disease. But the root cause may be a combination of stressors.

Melodie Putnam | Mar 2019 | Article Peer reviewed (Gray level)

The Economic Impact of Onion Pests in the Treasure Valley

A look at pest data for onions grown in the Treasure Valley demonstrates the yield and economic impacts of specific pests and management practices. This data can help researchers, crop consultants and those ...

Katie Murray, Isaac Sandlin, Peter Ellsworth, Paul Jepson, Al Fournier, Hang-Kwang Luh, Stuart Reitz | Mar 2022 | Extension Catalog publication Peer reviewed (Orange level)

Managing blueberry viruses in the Pacific Northwest

While blueberries grow well in the Pacific Northwest, five major viruses afflict plants in this region. Learn what you need to know to prevent and manage viral disease in your blueberry plants. The most important step? Use certified virus-tested planting stock.

Robert R. Martin | Mar 2015 | Article

How to prevent gray mold in hemp

Gray mold outbreaks on hemp caused the fungus Botrytis cinerea can spread easily and quickly kill plants. Here's how hemp growers can create conditions that will keep gray mold at bay.

Cynthia M. Ocamb | Sep 2022 | Article

Details matter when evaluating plant problems

When the cause of a plant ailment isn't obvious, a bit of detective work is in order. That involves many small observations that together create a web of information that leads to the identity of the ailment.

Nicole Sanchez | Apr 2019 | Article

Monitoring diseases in the field

Diseases can reduce the yield and nutritional quality of crops. Vectors are organisms that transmit pathogens that cause diseases and can also threaten crops. Some important vectors of plant pathogens in the Pacific Northwest ...

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video Peer reviewed (Gray level)

Asparagus wilt?

Q: We have had a wonderful patch of Jersey Giant asparagus for the past twenty five years. This year, we have something "infecting" a few of the clumps of our asparagus and we can't identify it. It appears to be some kind of wilt or virus?

A: View answer | View all featured questions

Do my laurels have shothole?

Q: We have some large laurels with holes and discoloration on the leaves and wondering what is causing it and how to treat it. We don't see anything on the bottom side of leaves. We'd appreciate your opinion and advice.

A: View answer | View all featured questions

Bacterial canker infection and control

PowerPoint presentation by Bob Spotts and Kelly Wallis on the infection and control of Bacterial canker.

Lynn Long | Mar 2010 | Presentation