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Alexandra Stone

Associate Professor
alex.stone [at]

Office: 541-737-5461
Other: (541) 602-4676

I have been investigating the use of the biological control agent commercially available as Contans (Coniothyrium minitans) as a control for white mold of vegetables, especially snap beans grown by processed vegetable growers. This project has been supported by grants from Western SARE, Western Region IPM, and the Oregon Processed Vegetable Commission.

I am working on identifying the cause of cucurbit wilt (with Ken Johnson and the Plant Clinic, OSU Botany and Plant Pathology) and finding solutions to other production problems (fruit rots, storage quality) associated with the production of cucurbit crops (Golden Delicious, other winter squash, cucumbers) in western Oregon. This project is supported by a grant from Western SARE.

I am working with Aaron Heinrich and Dan Sullivan on pH management (in combination with cultural practices and biological control) for suppression of clubroot in crucifers. This project has been supported by grants from OSU Ag Research Foundation and the Oregon Processed Vegetable Commission.

I am working on a project with cooperators in Washington and California in which we are describing soil and pest management practices and functions on long term organic farms as well as working to find solutions to their intractable soil and pest problems. This project is supported by a grant from Western SARE.

In the past I have evaluated cover crops and rotation for their potential to suppress root rot of sweet corn; we have shown that oats are the winter cover crop most consistently suppressive and a four rotation reduced root rot severity. This project was supported by the Oregon Processed Vegetable Commission.

A few years ago I worked with others at OSU and 10 or so of Oregon's most experienced organic vegetable farmers on Ospud, a participatory organic potato research and outreach project - learn more at Participatory Organic Potato Project. This project was supported by Western SARE.

I work with Oregon conventional and organic vegetable farmers on cultural and biological control of plant diseases (corn root rot, bean mold, cucurbit wilt, clubroot) and cover cropping. I also work with the Oregon Processed Vegetable Commission on its sustainability initiative, with a current focus on wildife habitat conservation on Willamette Valley farms.

I lead  and am a leadership team member of eOrganic, the Organic Agriculture resource area for eXtension. Find us at and

I produced Weed 'Em and Reap, which is a 2-DVD series of videos highlighting farmers and researchers working on non-chemical weed management and reduced tillage strategies. You can find all of the Weed 'em and Reap videos at  and at eOrganic's YouTube site.


Affiliated with: 
Horticulture Extension
I accept graduate students for Horticulture

Professional Accomplishments

  • Vegetable specialist in the Dept of Horticulture since 2000.
  • Biology (BS, Dartmouth College, Hanover, NH)
  • Environmental Science (PhD Ohio State University, emphases Plant Pathology and Soil Science)
  • postdoctoral project in the Soils Dept at Univ. of WI Madison

My Publications

Outreach and Extension

I lead, OSU's vegetable production web portal. There you can find the Oregon Processed Vegetable Commission website, VegNet, and information on vegetable production, sustainability, and wildlife habitat conservation for vegetable growers in Oregon.

I am a member of the leadership team for eOrganic, the national eXtension Community of Practice at and

Links to some of my outreach projects:

White Mold of Snap Bean and Other Vegetable Crops


Root Rot of Sweet Corn in the Willamette Valley (I produced the Weed 'Em and Reap I and II series)

Participatory Organic Potato Project