Oregon farmers grew more than 6600 acres of certified organic vegetables in 2009. The top vegetables, by acreage, included salad greens (147 acres), sweet corn (1509 acres), onions (861 acres), snap beans (195), peas (775), winter squash (378), and potatoes (1135) (from http://csanr.wsu.edu/publications/techreports/Organic%20Stats/OR_Organic... ).

This page aggregates publications, videos, and other content of interest to organic vegetable farmers in Oregon. Sources include eOrganic/eXtension articles and webinars, Weed 'em and Reap video clips, and extension publications.


December 31, 2016

The market for organic vegetables is increasing. As conventional farmers transition fields to organics to meet this demand, there is a need for better organic nutrient management guidance, especially for nitrogen (N). Organic N management is more challenging than conventional N management due to a higher level of uncertainty surrounding the N supplying capacity of an organically managed soil as well as the constraints of organic fertilizers (supply, application timing and placement, and uncertainty of release rate and amount). As a result, conventional nutrient management strategies may not be appropriate for organically managed systems. With organic N management there is often a higher risk of excessive nitrate-N loss and higher risk of not achieving economic yield targets.

December 24, 2014

It is difficult to find information on winter squash production and storage. This page aggregates resources relevant to Oregon winter squash growers.

January 10, 2016

This handout summarizes the results from clubroot resistant brassica (cabbage, broccoli, cauliflower, Napa cabbage, etc) variety trials conducted in 2015-16 on farms in the Willamette Valley of Oregon as well as in greenhouse screening trials.

December 24, 2014

Farmers in western Oregon can lose a significant portion of their winter squash in storage to storage rots. In winters 2012-2015 we collected samples of stored squash with rot symptoms from farmers in western Oregon and the OSU Plant Clinic identified the pathogens causing those rots. This article includes photos of the rot symptoms, descriptions of the diseases, and information on how to control storage rots.

January 28, 2014

White mold is a serious foliar and pod disease of snap beans grown for processing in western Oregon as well as in all major snap bean production regions in the US. White mold has a wide host range as it is a pathogen on more than 400 plant species.

July 29, 2013

Clubroot is becoming an increasing problem on Willamette Valley vegetable farms. Most cultivated brassica crops (broccoli, cauliflower, cabbage, etc.) are highly susceptible to the disease, which is caused by the soilborne fungus Plasmodiophora brassicae. In severe cases it can cause significant crop losses, and heavily infested fields may be taken out of production. Once a field is infected, eliminating the pathogen is difficult if not impossible because its thick walled resting spores have been shown to remain viable in soil for up to 18 years. As a result, once pathogen populations have developed to economically damaging levels, the goal of the farmer is to manage rather than eradicate the disease. One effective control strategy is to raise the soil pH to ≥7.2 through liming.

Watkins, Chris B. and Jacqueline F. Nock (Department of Horticulture, Cornell University). 2012. Production Guide for Storage of Organic Fruits and Vegetables. New York State IPM Publication No. 10

Navazio, J., 2009. Why Organic Seed?. eOrganic article. Available at http://www.extension.org/article/18339

January 1, 2008

Selman, L., N. Andrews, A. Stone, A. Mosley. 2008. What's wrong with my potato tubers? Diagnosing tuber abnormalities in western Oregon and Washington. Oregon State University Extension EM 8948-E. Corvallis, OR.

Barbercheck, M., 2009. Decomposers in Organic Farming Systems. eOrganic article. Available at http://www.extension.org/article/18905.

Coolong, T. 2009. Low Cost High Tunnel Construction. eOrganic article. Available at http://www.extension.org/article/18356

January 1, 2010

Maul, J., 2010. Cover Crop Selection. eOrganic webinar. Available at http://www.extension.org/article/27100

Andrews, N. and B. Baker, 2009. Can I Use This Input on My Organic Farm?. eOrganic article. Available at http://www.extension.org/article/18321.

Andrews, N. and B. Baker, 2009. Can I Use this Product for Disease Management on my Organic Farm?. eOrganic article. Available at http://www.extension.org/article/18360.

Pool, K. and A. Stone, 2009. Construction of High Tunnels: Resources for Organic Farmers. eOrganic article. Available at http://www.extension.org/article/18369

Barbercheck, M., 2009. Biological Control of Insect Pests . eOrganic article. Available at http://www.extension.org/article/18931.

January 1, 2010

Riddle, J., 2010. ABCs of Organic Certification Webinar. eOrganic webinar. Available at http://www.extension.org/article/25080.

December 1, 2010

Grossman, J., 2010.  Assessing Nitrogen Contribution and Rhizobia Diversity Associated with Winter Legume Cover Crops in Organic Systems Webinar by eOrganic. Available at http://www.extension.org/article/31037

January 1, 2008

Sullivan, D.M., J.P.G. McQueen, and D.A. Horneck. 2008. Estimating Nitrogen Mineralization in Organic Potato Production. Oregon State University Extension EM 8948-E. Corvallis, OR.

January 1, 2008

Ambrosino, M. 2008. Flea beetle management in organic potato production. Oregon State University Extension EM 8747-E. Corvallis, OR.

December 1, 1988

OBJECTIVE: To evaluate the efficacy of registered and unregistered chemical controls of Downy Mildew of Table Beets (Peronospora schachtii) and other foliar diseases of beets.

Pool, K. and A. Stone, 2009. Siting High Tunnels. eOrganic article. Available at http://www.extension.org/article/18365

Pool, K. and A. Stone, 2009. Introduction to High Tunnels. eOrganic article. Available at http://www.extension.org/article/18358

Barbercheck, M. and E. Zaborski, 2009. Insect Pest Management: Differences Between Conventional and Organic Farming Systems . eOrganic article. Available at http://www.extension.org/article/19915.

Pool, K. and A. Stone, 2009. High Tunnel Materials. eOrganic article. Available at http://www.extension.org/article/18367

Barbercheck, M., 2009. Ecological Understanding of Insects in Organic Farming Systems. eOrganic article. Available at http://www.extension.org/article/18906

Colley, M. and B. Baker, 2009. Sourcing Certified Organic Seed and the National Organic Program Regulations. eOrganic article. Available at http://www.extension.org/article/18338

January 1, 2010

Wiswall, R., 2010. Planning Your Organic Farm for Profit Webinar by eOrganic. eOrganic webinar. Available at http://www.extension.org/article/26410.

January 1, 2010

Mohler, C., 2010. Planning for Flexibility in Effective Crop Rotations. eOrganic webinar. Available at: http://www.extension.org/article/26734

January 1, 2010

Coolong, T., 2010. High Tunnel Production and Low Cost Tunnel Construction Webinar from eOrganic. eOrganic webinar. Available at http://www.extension.org/article/26091.

Weston, G., J. Eveland, J. Jebbia, and A. Stone, 2009. Incorporating High Tunnels into a Diversified Organic Vegetable Farm in Oregon: Case Study of Gathering Together Farm. eOrganic article. Available at http://www.extension.org/article/18352

December 1, 2009

Miller, S., A. Stone, and M. Mcgrath, 2009. Organic Late Blight Management 2009 Webinar by eOrganic. eOrganic webinar. Available at http://www.extension.org/article/24987.

Pool, K., 2009. Introduction to Season Extension in Organic Vegetable Production Systems. eOrganic article. Available at http://www.extension.org/article/18366

December 1, 2009

Energy input comparisons between tillage systems; evaluation of the value of legumes as part of a cover crop mixture used in strip-till sweet corn production; evaluation of the nitrogen contribution of legume-based cover crops to organic vegetable production.

Stone, A., B. Baker, E. Brown Rosen, E. Sideman, A. M. Shelton, B. Caldwell and C. Smart, 2009. Organic Management of Late Blight of Potato and Tomato with Copper Products. eOrganic article. Available at http://www.extension.org/article/18351.

Cox, B.H., 2009. Training Systems and Pruning in Organic Tomato Production. eOrganic article. Available at http://www.extension.org/article/18647

Stone, A., 2009. Organic Vegetable Production: Farm Case Studies, Systems Descriptions, and Farmer Interviews. eOrganic article. Available at http://www.extension.org/article/18364

Cox, B.H., 2009. Field Production of Organic Tomatoes. eOrganic article. Available at http://www.extension.org/article/18653

Marriott, E., 2009. Making and Using Compost for Organic Farming. eOrganic article. Available at http://www.extension.org/article/18567

January 1, 2010

Riddle, J., 2010. Getting EQIPed: USDA Conservation Programs for Organic and Transitioning Farmers Webinar from eOrganic. eOrganic webinar. Available at http://www.extension.org/article/25971.

Miller, S.A., 2009. Managing Diseases of Organic Tomatoes in Greenhouses and High Tunnels. eOrganic article. Available at http://www.extension.org/article/18337

January 1, 2010

Andrews, N. and D. Sullivan, 2010. Estimating Plant-Available Nitrogen Contribution from Cover Crops. eOrganic webinar. Available at: http://www.extension.org/article/26919

Cox, B.H. and T. Coolong, 2009. Management of Non-Pathogenic Fruit Disorders of Tomato in Organic Production Systems. eOrganic article. Available at http://www.extension.org/article/18629

December 1, 2010

Carpenter-Boggs, L., D. Granatstein, and D. Huggins, 2010.  Greenhouse Gases and Agriculture: Where does Organic Farming fit Webinar by eOrganic.  eOrganic webinar. Available at http://eorganic.info/node/5617

Stone, A. 2009. High Tunnels on Organic Vegetable Farms: Case Studies. eOrganic article. Available at http://www.extension.org/article/18362.

Curran, W., and M. Ryan, 2010.  Using cover crops to suppress weeds in Northeast US farming systems Webinar by eOrganic. eOrganic webinar. Available at http://eorganic.info/node/5620

Stone, A. 2009. Organic Management of Late Blight of Potato and Tomato (Phytophthora infestans). eOrganic article. Available at http://www.extension.org/article/18361.