Following a national search, Dr. Steve Culman has been named the new Director of the Central Oregon Agricultural Research and Extension Center, effective October 1.
Dr. Culman brings a wealth of experience and expertise in...
Publications Database
Annual Reports
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Water shortages loom large at Jefferson County Farm Fair
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
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...
Discrimination of Mint Strains of Verticillium dahliae Using High Resolution Melting Analysis
Series/Report Number: COARC2015
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...
Environmental Factors Associated with Ergot Ascospore Production in Seed in Central Oregon and Evaluation of Ergot Resistance/Klendusity in Kentucky Bluegrass Cultivars
Series/Report Number: COARC2015
Chapter Number: 1
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 Copper and Quaternary Ammonium to Control Bacterial Blight in Steckling-Planted Carrot Seed Crops
Series/Report Number: COARC2015
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....
Publications
2024
Journal Article
“Drought Response In Herbaceous Plants: A Test Of The Integrated Framework Of Plant Form And Function”. Functional Ecology (2024): n. pag. Web. Functional Ecology.
“Repeated Clearing As A Mechanism For Savanna Recovery Following Bush Encroachment”. Journal of Applied Ecology (2024): n. pag. Web. Journal Of Applied Ecology.
. “Assessing Conservation Readiness: The Where, Who, And How Of Strategic Conservation In The Sagebrush Biome”. Rangeland Ecology & Management 97 (2024): 187 - 199. Web. Rangeland Ecology & Management.
“Effects Of Electrolyte Supplementation On Performance And Physiological Responses Of Preconditioning Beef Calves”. Translational Animal Science 8 (2024): n. pag. Web. Translational Animal Science.
. “Dryland Restoration Needs Suggest A Role For Introduced Plants”. Global Ecology and Conservation 53 (2024): e03005. Web. Global Ecology And Conservation.
. “Photosynthetic Resilience Of Elymus Elymoides And Pseudoroegneria Spicata Seedlings Following Acute Water Stress”. Rangeland Ecology & Management 94 (2024): 195 - 198. Web. Rangeland Ecology & Management.
. “Variation In The Role Of The Flag-Leaf In Reproductive Effort Of Semiarid Rangeland Bunchgrasses”. Ecosphere 15.8 (2024): n. pag. Web. Ecosphere.
“Repeated Clearing As A Mechanism For Savanna Recovery Following Bush Encroachment”. Journal of Applied Ecology (2024): n. pag. Web. Journal Of Applied Ecology.
“Climate Change Amplifies Ongoing Declines In Sagebrush Ecological Integrity”. Rangeland Ecology & Management 97 (2024): 25 - 40. Web. Rangeland Ecology & Management.
“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.
“Ecological Benefits Of Strategically Applied Livestock Grazing In Sagebrush Communities”. Ecosphere 15.5 (2024): n. pag. Web. Ecosphere.
“Evaluation Of The Gap Intercept Method To Measure Rangeland Connectivity”. Rangeland Ecology & Management (2024): n. pag. Web. Rangeland Ecology & Management.
“Cross-Scale Analysis Reveals Interacting Predictors Of Annual And Perennial Cover In Northern Great Basin Rangelands”. Ecological Applications 34.4 (2024): n. pag. Web. Ecological Applications .
“Climate Change Amplifies Ongoing Declines In Sagebrush Ecological Integrity”. Rangeland Ecology & Management 97 (2024): 25 - 40. Web. Rangeland Ecology & Management.
“Demography With Drones: Detecting Growth And Survival Of Shrubs With Unoccupied Aerial Systems”. Restoration Ecology (2024): n. pag. Web. Restoration Ecology.
“Evaluating Performance Of Three Types Of Carbon Seed Coatings On Seedling Development”. Restoration Ecology (2024): n. pag. Web. Restoration Ecology.
“A Strategic And Science-Based Framework For Management Of Invasive Annual Grasses In The Sagebrush Biome”. Rangeland Ecology & Management 97 (2024): 61 - 72. Web. Rangeland Ecology & Management.
“Facilitating Comparable Research In Seedling Functional Ecology”. Methods in Ecology and Evolution 15.3 (2024): 464 - 476. Web. Methods In Ecology And Evolution.
“Post-Fire Management Decisions Have Consequences: Drill-Seeding Disturbance And Effects Of Co-Seeding Introduced With Native Bunchgrasses”. Global Ecology and Conservation 53 (2024): e03021. Web. Global Ecology And Conservation.
“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.
“Cross‐Scale Analysis Reveals Interacting Predictors Of Annual And Perennial Cover In Northern Great Basin Rangelands”. Ecological Applications (2024): n. pag. Web. Ecological Applications.
“Modeling Riparian Use By Cattle – Influence Of Management, Season, And Weather”. Rangeland Ecology & Management (2024): n. pag. Web. Rangeland Ecology & Management.
“Evaluating Different Rates Of Activated Carbon In Commercially Produced Seed Coatings In Laboratory And Field Trials”. Restoration Ecology (2024): n. pag. Web. Restoration Ecology.
“The Carbon Security Index: A Novel Approach To Assessing How Secure Carbon Is In Sagebrush Ecosystems Within The Great Basin”. Rangeland Ecology & Management 97 (2024): 169 - 177. Web. Rangeland Ecology & Management.
. “First Record Of Tricolored Blackbirds In Idaho”. Western Birds 55.1 (2024): 43 - 50. Web. Western Birds.
“Effects Of Trace Mineral Injections On Measures Of Growth And Trace Mineral Status Of Primiparous Cows And Their Calves”. Translational Animal Science 8 (2024): n. pag. Web. Translational Animal Science.
“A Test Of Activated Carbon And Soil Seed Enhancements For Improved Sub-Shrub And Grass Seedling Survival With And Without Herbicide Application”. Plants 13.21 (2024): 3074. Web. Plants.
. “Sagebrush Ecosystems Are More Than Artemisia: The Complex Issue Of Degraded Understories In The Great Basin”. Rangeland Ecology & Management 94 (2024): 184 - 194. Web. Rangeland Ecology & Management.
“Effects Of Dormant Season And Contemporary Spring-Summer Grazing On Plant Community Composition In The Sagebrush Ecosystem”. Rangeland Ecology & Management (2024): n. pag. Web. Rangeland Ecology & Management.
“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.
. “A Brief History Of Sagebrush Management In The Great Basin: From Removal To Reduction And Beyond”. Rangelands 46.3 (2024): 63 - 71. Web. Rangelands.
“State Of The Sagebrush: Implementing The Sagebrush Conservation Design To Save A Biome”. Rangeland Ecology & Management 97 (2024): 1 - 11. Web. Rangeland Ecology & Management.
“Long-Term Effects Of Revegetation Efforts In Annual Grass−Invaded Rangeland”. Rangeland Ecology & Management 92 (2024): 59 - 67. Web. Rangeland Ecology & Management.
“Weather Effects On Herbaceous Yields: Wyoming Big Sagebrush Steppe, Southeastern Oregon”. Western North American Naturalist 84.1 (2024): 89-106. Web. Western North American Naturalist.
. “Herbivory Can Reduce Perennial Grass Seedling Survival, But Temperature And Cumulative Precipitation Are More Important Predictors In The First Growing Season”. Restoration Ecology (2024): n. pag. Web. Restoration Ecology.
“What's In A Name? Standardizing Terminology For The Enhancement Of Research, Extension, And Industry Applications Of Virtual Fence Use On Grazing Livestock”. Rangeland Ecology & Management 94 (2024): 199 - 206. Web. Rangeland Ecology & Management.
“Activated Carbon Seed Technology Protects Seedlings From Two Pre-Emergent Herbicides Applied In Tandem”. Rangeland Ecology & Management 96 (2024): 67 - 71. Web. Rangeland Ecology & Management.
Report
Oregon Beef Council Report 2024 Edition. 2024. Print. Oregon Beef Council Report 2024 Edition.
2023
Extension Publication
Journal Article
. “Invasive Annual Grasses Show Decrease In Seed Size But No Change In Growth Or Carbon Economy Following Invasion”. Biological Invasions 25.5 (2023): 1613 - 1625. Web. Biological Invasions.
. “Frequent And Catastrophic Wildfires In Great Basin Rangelands: Time For A Proactive Management Approach”. Rangeland Ecology & Management 89 (2023): 1 - 2. Web. Rangeland Ecology & Management.
“A Recruitment Niche Framework For Improving Seed‐Based Restoration”. Restoration Ecology 31.7 (2023): n. pag. Web. Restoration Ecology.
. “Grazing Intensity Effects On Fire Ignition Risk And Spread In Sagebrush Steppe”. Rangeland Ecology & Management 89 (2023): 51 - 60. Web. Rangeland Ecology & Management.
“Fire Needs Annual Grasses More Than Annual Grasses Need Fire”. Biological Conservation 286 (2023): n. pag. Web. Biological Conservation.
“Plant Recruitment In Drylands Varies By Site, Year, And Seeding Technique”. Restoration Ecology 31.2 (2023): n. pag. Web. Restoration Ecology.
“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.
“Testing The Hierarchy Of Predictability In Grassland Restoration Across A Gradient Of Environmental Severity”. Ecological Applications 33.8 (2023): n. pag. Web. Ecological Applications.
“Effects Of Using Indaziflam And Activated Carbon Seed Technology In Efforts To Increase Perennials In Ventenata Dubia–Invaded Rangelands”. Rangeland Ecology & Management 88 (2023): 70 - 76. Web. Rangeland Ecology & Management.
“Using Virtual Fencing To Create Fuel Breaks In The Sagebrush Steppe”. Rangeland Ecology & Management 89 (2023): 87 - 93. Web. Rangeland Ecology & Management.