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                    U.S. DEPARTMENT OF AGRICULTURE
 Forage Seed and Cereal Research Unit: Corvallis, OR
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ARS Home Pacific West Area Corvallis, Oregon Forage Seed and Cereal Research Unit People & Locations







Hannah  Rivedal

                                                                (PhD)
                        Forage Seed and Cereal Research Unit

                        




                        
                        Research Plant Pathologist
                        Phone: (541) 738-4144
                        
                        
                        Fax: (Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)
                            ProjectsDeveloping Decision Support Tools to Incorporate Hemp into Existing Farming Enterprises
                                                    In-House Appropriated
                                                                    (D)Accession Number: 438146Optimizing and Stabilizing Economic and Ecological Sustainability of Pacific Northwest Seed Cropping Systems Under Current and Future Climate Conditions
                                                    In-House Appropriated
                                                                    (D)Accession Number: 445390Professional Support for the 2024 Annual Meeting of the Pacific Division of the American Phytopathological Society
                                                    Grant
                                                                    (G)Accession Number: 444904Determining the Predominant Industrial Hemp Diseases to Assist Breeding and Management Efforts
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 440965Understanding Pacific Northwest Turfgrass Plant Parasitic Nematode Communities to Improve Management Efficiency
                                                    Trust Fund Cooperative Agreement
                                                                    (T)Accession Number: 443397**Publications**
                                                (Clicking on the reprint icon
                                                    Reprint Icon
                                                    will take you to the publication reprint.)First report of Meloidogyne hapla on hemp (Cannabis sativa) in Oregon
                                                        

- (Peer Reviewed Journal)Nunez-Rodriguez, L., Rivedal, H.M., Peetz, A.B., Ocamb, C.M., Zasada, I.A. 2024. First report of Meloidogyne hapla on hemp (Cannabis sativa) in Oregon. Journal of Nematology. 56(1). https://doi.org/10.2478/jofnem-2024-0008.Characterization of powdery mildew fungi affecting hemp in the Pacific Northwest
                                                        

- (Peer Reviewed Journal)Rivedal, H.M., Wiseman, M.S., Richardson, B.J., Massie, S.T., Garfinkel, A.R., Ocamb, C.M., Gent, D.H. 2024. Characterization of powdery mildew fungi affecting hemp in the Pacific Northwest. PhytoFrontiers. 4(2):205-212. https://doi.org/10.1094/PHYTOFR-07-23-0099-R.First report of Spiroplasma citri associated with disease symptoms in field-grown hemp (Cannabis sativa) in the Pacific Northwest
                                                        

- (Peer Reviewed Journal)Rivedal, H.M., Temple, T.N., Thomas, W.J., Ocamb, C.M., Funke, C., Skillman, V.P., Jones, G., Shrestha, G., Kc, A., Dung, J.K., Frost, K.E. 2024. First report of Spiroplasma citri associated with disease symptoms in field-grown hemp (Cannabis sativa) in the Pacific Northwest. Plant Disease. 108(1):202. https://doi.org/10.1094/PDIS-07-23-1419-PDN.Seed gall nematodes in grasses grown for seed: Survey and identification methods
                                                        

- (Abstract Only)Rivedal, H.M., Zasada, I.A. 2023. Seed gall nematodes in grasses grown for seed: Survey and identification methods. Grow:  Plant Health Exchange. https://doi.org/10.1094/GROW-REG-07-23-001.Diagnostic guide: Fusarium head blight of cereal grains
                                                        

- (Peer Reviewed Journal)Hagerty, C.H., Namdar, G.F., Rivedal, H.M., Wen, N., Yin, C. 2023. Diagnostic guide: Fusarium head blight of cereal grains. Plant Health Progress. 24(2):252-257. https://doi.org/10.1094/PHP-10-22-0110-DG.First report of the root-lesion nematode, Pratylenchus penetrans, parasitizing hemp (Cannabis sativa) in Washington
                                                        

- (Peer Reviewed Journal)Zasada, I.A., Nunez-Rodriguez, L., Rivedal, H.M., Peetz, A.B., Ocamb, C. 2023. First report of the root-lesion nematode, Pratylenchus penetrans, parasitizing hemp (Cannabis sativa) in Washington. Plant Health Progress. https://doi.org/10.1094/PHP-12-22-0122-BR.First report of Pyricularia grisea causing gray leaf spot of perennial ryegrass (Lolium perenne L.) in Oregon
                                                        

- (Peer Reviewed Journal)Braithwaite, E., Wang, R., Kowalewski, A., Tabima, J.F., Temple, T.N., Rivedal, H.M. 2023. First report of Pyricularia grisea causing gray leaf spot of perennial ryegrass (Lolium perenne L.) in Oregon. Plant Health Progress. 24(3):382-385. https://doi.org/10.1094/PHP-11-22-0119-BR.Comparing methods to quantify cover in turfgrass research
                                                        

- (Peer Reviewed Journal)Kowalewski, A.R., Schmid, C.J., Braithwaite, E.T., McNally, B.C., Elmore, M.T., Mattox, C.M., McDonald, B.W., Wang, R., Lambrinos, J.G., Fitzpatrick, G., Rivedal, H.M. 2023. Comparing methods to quantify cover in turfgrass research. Crop Science. 63:1581-1591. https://doi.org/10.1002/csc2.20908.A quantitative PCR assay for detection and quantification of Fusarium sambucinum
                                                        

- (Peer Reviewed Journal)Thomas, W.J., Borland, T.G., Bergl, D.D., Claassen, B.J., Flodquist, T.A., Montgomery, A.S., Rivedal, H.M., Woodhall, J., Ocamb, C.M., Gent, D.H. 2022. A quantitative PCR assay for detection and quantification of Fusarium sambucinum. Plant Disease. 106:2601-2606. https://doi.org/10.1094/PDIS-02-22-0269-RE.Horizontal transmission and expression of Epichloë typhina in orchardgrass (Dactylis glomerata)
                                                        

- (Peer Reviewed Journal)Merlet, L., Dombrowski, J.E., Bushman, B.S., Gilmore, B.S., Rivedal, H.M., Martin, R.C. 2022. Horizontal transmission and expression of Epichloë typhina in orchardgrass (Dactylis glomerata). European Journal of Plant Pathology. 163:415–428. https://doi.org/10.1007/s10658-022-02485-y.An overview of pathogens associated with biotic stresses in hemp crops in Oregon, 2019-2020
                                                        

- (Peer Reviewed Journal)Rivedal, H.M., Funke, C.N., Frost, K.E. 2022. An overview of pathogens associated with biotic stresses in hemp crops in Oregon, 2019-2020. Plant Disease. 106(5):1334-1340. https://doi.org/10.1094/PDIS-11-21-2415-SR.First report of Pectobacterium versatile causing potato soft rot in Oregon and Washington
                                                        

- (Peer Reviewed Journal)Ma, X., Brazil, J., Rivedal, H.M., Perry, K.L., Frost, K., Swingle, B.M. 2022. First report of Pectobacterium versatile causing potato soft rot in Oregon and Washington. Plant Disease. https://apsjournals.apsnet.org/doi/epdf/10.1094/PDIS-08-21-1635-PDN.Diversity and pathogenicity of Pectobacterium species responsible for causing soft rot and blackleg of potato in the Columbia Basin
                                                        

- (Peer Reviewed Journal)Rivedal, H.M., Brazil, J.A., Frost, K.E. 2021. Diversity and pathogenicity of Pectobacterium species responsible for causing soft rot and blackleg of potato in the Columbia Basin. American Journal of Potato Research. 98:267-284. https://doi.org/10.1007/s12230-021-09841-4.


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