Publications Database

Annual Reports

Enter a combination of keywords, authors and/or year of publication to filter results.

Water shortages loom large at Jefferson County Farm Fair

James Lange, a Jefferson County 4-H member and Madras High Student, works the OSU Extension Service booth at the Central Oregon Farm Fair. Photo: Michael Kohn/The Bulletin

The Central Oregon Farm Fair & Trade Show. The fair, held at the Jefferson County Fairgrounds Wednesday and Thursday, is an annual gathering of farmers, ranchers, equipment dealers, agronomists and others in this area’s...

Altitude adds energy value to alfalfa hay

tractor cutting field of alfalfa. Photo: Hay & Forage Grower

The list of components in a dairy cow’s ration includes forages, nonfiber carbohydrate feeds (grains and by-products), rumen degradable and by-pass proteins, fat, minerals, vitamins, and other feed additives.

Characterizing the Incidence and Distribution of Bacterial Blight Infestation in Individual Carrot Seeds: Can One Bad Seed Spoil the Whole Seed Lot?

Series/Report Number: COARC2016

Abstract: Bulk samples of carrot seed are tested for Xanthomonas hortorum pv. carotae (Xhc) using a seed wash dilution-plating protocol (Asma, 2005). In this...

Electronic Mint Pest Alert Newsletter Regarding Control of Mint Root Borer, Cutworm Complex and Loopers (Year 3)

Series/Report Number: COARC2016
Chapter Number: 44

Abstract: An electronic newsletter was developed for the peppermint production regions in Oregon to assist growers...

Evaluation of Disinfectant Seed Treatments to Reduce Xanthomonas hortorum pv. carotae in Carrot Seed Lots

Bacterial blight of carrot, caused by the plant pathogenic bacterium Xanthomonas hortorum pv. carotae (Xhc), is a common disease of carrot wherever the crop is grown. The disease can affect carrot foliage, stems, umbels, and roots and...

Evaluation of Ergot Resistance and Disease Escape in Kentucky Bluegrass Cultivars

Series/Report Number: COARC2016

Abstract: Ergot is an important disease of Kentucky bluegrass seed production in Oregon. The disease is caused by the fungal pathogen Claviceps purpurea,...

Evaluation of Herbicides for Control of Rough Bluegrass, Cheatgrass, Rattail Fescue and Medusahead in Establishment Year and Second Year Kentucky Bluegrass Grown for Seed

Series/Report Number: COARC2016

Abstract: Adequate weed control during the establishment year of Kentucky bluegrass seed production is a challenge, particularly for grassy weeds in a grass...

Evaluation of ManKocide Alternatives for Bacterial Blight Control in Steckling-to-Seed Carrot Seed Crops

Series/Report Number: COARC2016

Abstract: Management of bacterial blight in carrot seed crops can be difficult and begins with the planting of healthy or treated seed. However, planting...

Evaluation of Potential New Herbicides in Carrots Applied as a Directed Spray at Layby

Series/Report Number: COARC2016

Abstract: Weed resistance to ongoing use of Lorox in carrots grown for seed is a concern to industry representatives and growers. This project was established...

Evaluation of Potential New Insecticide in Carrots for Lygus Control

Series/Report Number: COARC2016

Abstract: Lygus bugs feeding on carrots grown for seed during flowering and seed maturation reduce seed viability. Potential new insecticides for control of...

Evaluation of Potential New Insecticides and Fungicides for Honey Bee Repellency in Seed Carrots

Series/Report Number: COARC2016

Abstract: To insure honey bee safety during crop pollination, potential new products were screened for bee repellency. This research was conducted in a carrot...

Foliar Boron Fertilizer Application and Timing in Hybrid Carrot Seed Production

Hybrid European Nantes carrot seed production can be challenging for growers as yields can be unreliable. Demand for boron (B) in many crops is greatly elevated during flowering and seed set even when B in the plant leaves are in the...

Management of Verticillium Wilt Using Green Manure Biofumigants

Series/Report Number: COARC2016

Abstract: Verticillium wilt caused by the fungus Verticillium dahliae is the most important disease of commercial mint production. Rotation to non-hosts is...

Pilot Balloon Observations, 2016, Jefferson County Smoke Management

Series/Report Number: COARC2016

Abstract: Pilot Balloon (PIBAL) observations are a major component of the daily decision-making process used in managing open field burning of grass seed and...

Prevalence of Race 2 Strains of Verticillium dahliae Causing Verticillium Wilt of Mint in Oregon

Series/Report Number: COARC2016

Abstract: Verticillium dahliae is a plant pathogenic fungus that causes Verticillium wilt, which is the most detrimental disease of commercially grown...

2015 COARC Annual Report

The Central Oregon Agricultural Research Center (COARC) faculty and staff are pleased to present this summary of 2015 research activities for your review. The reports included in this publication focus on grass seed, vegetable seed,...

Central Oregon Potato Extension Program, 2015

Series/Report Number: COARC2015

Abstract: Aphids, tuberworm moths, potato psyllids, and beet leafhoppers were collected and counted weekly in Jefferson County from June 23 to September 9,...

COARC Research Garden & Learning Center and Agricultural Education Outreach, 2015

Series/Report Number: COARC2015

Abstract: The Central Oregon Agricultural Research and Learning Center is an ongoing project in its 9th year of activity. The garden provides a hands-on...

Electronic Mint Pest Alert Newsletter to Promote Optimal Application of Coragen® to Control Mint Root Borer, Cutworms, Armyworms and Loopers, 2015

Series/Report Number: COARC2015

Abstract: An electronic newsletter was developed for the peppermint production regions in Oregon to assist growers and fieldmen consider control of mint root...

Evaluate Potential Crop Injury from Herbicides Applied the Final Year of Peppermint Production when Rotating to Kentucky Bluegrass Seed or Wheat

Series/Report Number: COARC2015

Abstract: There have been ongoing concerns by growers and fieldmen in about herbicides used in peppermint production carrying over when rotating into Kentucky...

Evaluation of Late-Season ManKocide Applications to Reduce Xanthomonas hortorum pv. carotae on Harvested Carrot Seed

Series/Report Number: COARC2015

Abstract: Field plots were established to evaluate the efficacy of late-season applications of ManKocide for the suppression of Xanthomonas hortorum pv....

Evaluation of N Fertilizer Rate and Timing on Wheat Yield

Series/Report Number: COARC2015

Abstract: This project sought to evaluate the effects of N rate and timing on yield and grain protein content in irrigated winter wheat grown in central...



Journal Article

Davies, Kirk W et al. Spring-Applied Treatments Offer Another Window Of Opportunity For Revegetation Of Annual Grass−Invaded Rangelands. Rangeland Ecology & Management 93 (2024): 104 - 111. Web. Rangeland Ecology & Management.
Winkler, Daniel E et al. Facilitating Comparable Research In Seedling Functional Ecology. Methods in Ecology and Evolution 15.3 (2024): 464 - 476. Web. Methods In Ecology And Evolution.
Olsoy, Peter J, and Katie J Sorenson. First Record Of Tricolored Blackbirds In Idaho. Western Birds 55.1 (2024): 43 - 50. Web. Western Birds.
Davies, Kirk W et al. Long-Term Effects Of Revegetation Efforts In Annual Grass−Invaded Rangeland. Rangeland Ecology & Management 92 (2024): 59 - 67. Web. Rangeland Ecology & Management.
Smith, Melinda D et al. Extreme Drought Impacts Have Been Underestimated In Grasslands And Shrublands Globally. Proceedings of the National Academy of Sciences 121.4 (2024): n. pag. Web. Proceedings Of The National Academy Of Sciences.
Holfus, Corinna M et al. Wyoming Big Sagebrush Transplant Survival And Growth Affected By Age, Season Of Planting, And Competition. Rangeland Ecology & Management 92 (2024): 1 - 11. Web. Rangeland Ecology & Management.


Extension Publication

Journal Article

Stephenson, Mitchell B et al. Strategic Supplementation To Manage Fine Fuels In A Cheatgrass (Bromus Tectorum)−Invaded System. Rangeland Ecology & Management 89 (2023): 61 - 68. Web. Rangeland Ecology & Management.
Larson, Julie E et al. A Recruitment Niche Framework For Improving Seed‐Based Restoration. Restoration Ecology 31.7 (2023): n. pag. Web. Restoration Ecology.
Orr, Devyn A, Jonathan D Bates, and Kirk W Davies. Grazing Intensity Effects On Fire Ignition Risk And Spread In Sagebrush Steppe. Rangeland Ecology & Management 89 (2023): 51 - 60. Web. Rangeland Ecology & Management.
Smith, Joseph T et al. Fire Needs Annual Grasses More Than Annual Grasses Need Fire. Biological Conservation 286 (2023): n. pag. Web. Biological Conservation.
Fernández‐Pascual, Eduardo et al. Seedarc, A Global Archive Of Primary Seed Germination Data. New Phytologist 240.2 (2023): 466 - 470. Web. New Phytologist.
Svejcar, Lauren et al. Plant Recruitment In Drylands Varies By Site, Year, And Seeding Technique. Restoration Ecology 31.2 (2023): n. pag. Web. Restoration Ecology.
Schantz, Merilynn C et al. Evaluating Multimodel Ensemble Seasonal Climate Forecasts On Rangeland Plant Production In The California Annual Grassland. Rangeland Ecology & Management 88 (2023): 135 - 142. Web. Rangeland Ecology & Management.
Boyd, Chad S et al. Using Virtual Fencing To Create Fuel Breaks In The Sagebrush Steppe. Rangeland Ecology & Management 89 (2023): 87 - 93. Web. Rangeland Ecology & Management.
Thomas, T.W., and Kirk W Davies. Grazing Effects On Fuels Vary By Community State In Wyoming Big Sagebrush Steppe. Rangeland Ecology & Management 89 (2023): 42 - 50. Web. Rangeland Ecology & Management.
Schantz, Merilynn C et al. Modeling Weather Effects On Plant Production In The California Annual Grassland. Rangeland Ecology & Management 87 (2023): 177 - 184. Web. Rangeland Ecology & Management.
Svejcar, Lauren, Kirk W Davies, and Alison L Ritchie. Ecological Restoration In The Age Of Apocalypse. Global Change Biology 29.17 (2023): 4706 - 4710. Web. Global Change Biology.
Maestas, Jeremy D et al. Using Dynamic, Fuels-Based Fire Probability Maps To Reduce Large Wildfires In The Great Basin. Rangeland Ecology & Management 89 (2023): 33 - 41. Web. Rangeland Ecology & Management.
Davies, Kirk W, Jonathan D Bates, and Chad S Boyd. Is Crested Wheatgrass Invasive In Sagebrush Steppe With Intact Understories In The Great Basin?. Rangeland Ecology & Management 90 (2023): 322 - 328. Web. Rangeland Ecology & Management.
Bates, Jonathan D et al. Effects Of Annual Weather Variation On Peak Herbaceous Yield Date In Sagebrush Steppe. Western North American Naturalist 83 (2023): 220-231. Web. Western North American Naturalist.
Price, William J et al. Managing Medusahead Using Dormant Season Grazing In The Northern Great Basin. Rangeland Ecology & Management 90 (2023): 146 - 156. Web. Rangeland Ecology & Management.
Smith, Joseph T et al. Where There's Smoke, There's Fuel: Dynamic Vegetation Data Improve Predictions Of Wildfire Hazard In The Great Basin. Rangeland Ecology & Management 89 (2023): 20 - 32. Web. Rangeland Ecology & Management.
Davies, Kirk W et al. Influence Of Directional Side Of Sagebrush Canopies And Interspaces On Microhabitats. Basic and Applied Ecology 72 (2023): 16 - 21. Web. Basic And Applied Ecology.
Wollstein, Katie, and Dustin D Johnson. Integrating Rangeland Fire Planning And Management: The Scales, Actors, And Processes. Rangeland Ecology & Management 86 (2023): 9 - 17. Web. Rangeland Ecology & Management.
Crist, Michele R et al. Trends, Impacts, And Cost Of Catastrophic And Frequent Wildfires In The Sagebrush Biome. Rangeland Ecology & Management 89 (2023): 3 - 19. Web. Rangeland Ecology & Management.
Beck, Jeffrey L et al. Chapter 10 Sage-Grouse . Rangeland Wildlife Ecology and Conservation (2023): 295-338. Web. Rangeland Wildlife Ecology And Conservation.



Goodwin, Jeff et al. Rangeland Ecosystem Services: Connecting Nature And People. 2023. Print. Society For Range Management.


Journal Article

Davies, Kirk W et al. Using Postfire Spatial Variability To Improve Restoration Success With Seeded Bitterbrush. Rangeland Ecology & Management 83 (2022): 117 - 123. Web. Rangeland Ecology & Management.
Arispe, Sergio A et al. Strategic Partnerships To Leverage Small Wins For Fine Fuels Management. Rangeland Ecology & Management 85 (2022): 66 - 75. Web. Rangeland Ecology & Management.