Stuart Reitz

Director of Malheur Experiment Station

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Department/Unit: Malheur Experiment Station

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Content by Stuart Reitz

Is this a hobo spider?

P: My neighbor has found this spider (see picture) twice in her house recently. Do you know what type of spider it is? Is it a hobo spider, and is it dangerous?

R: View answer | View all featured questions

Study guides strategic fertilizer and insecticide decisions for onion growers

This research provides practical, science-based tools for enhancing production efficiency and profitability.

Silvia I. Rondon, Stuart Reitz | Jul 2025 | Impact story

OSU helps sustain success of Oregon’s onion industry

Collective efforts by OSU help onion growers in Oregon improve their practices, reduce environmental impact and enhance crop productivity.

Stuart Reitz | May 2025 | Impact story

OSU leads the way in developing disease-resistant and sustainable potato varieties

The Hermiston Agricultural Research and Extension Center (HAREC), Klamath Basin Research and Extension Center (KBREC) and Malheur Experiment Station, all branches of the Oregon State University Agricultural Experiment Station, conduct ...

Stuart Reitz, Brian Charlton, Carlos Bonilla | Jan 2025 | Impact story

PNW Insect Management Handbook - Alfalfa Weevil (in English)

This section of the PNW Insect Management Handbook provides insecticide products currently labeled for use in controlling alfalfa weevil in hay crops.

Stuart Reitz | Oct 2024 | Online resource

OSU engages with onion growers to demonstrate an alternative method for plastic waste reduction

Drip tape irrigation produces two million pounds of plastic waste each year in Malheur County. Luckily, two OSU Chemical Engineering faculty have been working on a process that could turn drip tape plastic into diesel fuel for growers’ tractors.

Henry Carnell | Aug 27, 2024 | News story

Statewide Needs Assessment for the Hemp Industry in Oregon

This needs assessment identifies what is known about hemp cultivation and knowledge gaps recognized by industry members, including growers, processors and allied stakeholders. This information will help establish priorities...

Govinda Shrestha, Cynthia M. Ocamb, Hannah Rivedal, Achala KC, Jeremiah Dung, Kenneth Frost, Don Wysocki, Stuart Reitz, Jeffrey Steiner | Dec 2023 | OSU Extension Catalog

How to control household ants?

P: I have an ant problem inside my house. Throughout the year I have ants roaming every room of my house, with periodic outbreaks when they find something to eat. When there's an outbreak, I use bait to deal with them, but...

R: View answer | View all featured questions

Stink bugs and boxelder bugs everywhere?

P: The exterior of my house is covered in stink bugs and boxelder bugs. Occasionally, some also get inside my home. How do I get rid of them without using pesticides?

R: View answer | View all featured questions

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 | Jun 2023 | OSU Extension Catalog

What is this huge larvae in my mason bee box?

P: I found a chunk of dried mud with some larvae embedded in it. It was in our mason bee box, but way too big for mason bees. What could it be?

R: View answer | View all featured questions

An Integrated Pest Management Strategic Plan for Treasure Valley Onions: Oregon and Idaho (2019)

Growers, commodity-group representatives, pest-control advisors, university specialists, and other technical experts from the Treasure Valley in Oregon and Idaho provide an overview of onion production. They identify pest ...

Katie Murray, Stuart Reitz, Paul Jepson | Apr 2024 | OSU Extension Catalog

On-Farm Readiness Reviews

On-Farm Readiness Review (OFRR) is designed as a tool to help regulators and educators effectively prepare farmers for compliance with Food Safety Modernization Act (FSMA)'s produce safety rule.

Jovana Kovacevic, Joy Waite-Cusic, Luisa Santamaria, Stuart Reitz, Sara Runkel | Project

Potato psyllid vector of zebra chip disease in the Pacific Northwest

Zebra chip disease is a potato infection emergent in the Pacific Northwest. Learn about the bacterium, the biology of the potato psyllid vector, the damage it causes and management techniques.

Silvia I. Rondon, Alan Schreiber, Phil Hamm, Nora Olsen, Erik Wenninger, Carrie Wohleb, Tim Waters, Rodney Cooper, Darrin Walenta, Stuart Reitz | Jun 2023 | OSU Extension Catalog

Internal Dry Scale and Associated Bulb Rots of Onion

Onion growers and packers in the Pacific Northwest have observed a problem on red, white, and yellow cultivars: internal dry scale. Bulbs affected by internal dry scale have dead inner scales that are susceptible...

Lindsey J. du Toit, Tim Waters, Stuart Reitz | Jun 2023 | OSU Extension Catalog

Using A Plant Press (in English)

Preserving plant specimens is the best way to identify plants by their characteristics at a later period of time. It is always best (if possible) to collect the entire plant specimen at peak production, so you have included the roots, flowers and potentially the seeds of the plant.

Silvia I. Rondon, Mary Corp, Steve Van Vleet, Stuart Reitz, Pamela Hutchinson | Jun 2024 | Video

Monitoring diseases in the field (in English)

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 | Apr 2024 | Video

Detecting Plant Diseases in the Lab (in English)

The Hermiston Agricultural Research and Extension Center in Hermiston, Oregon has a full- service, plant pathology diagnostic lab that serves the growing needs of the agricultural community in the Columbia Basin. The lab receives ...

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson, Cassandra Sago | Apr 2024 | Video

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