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                    U.S. DEPARTMENT OF AGRICULTURE
 Horticultural Crops Disease and Pest Management Research Unit: Corvallis, OR
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Virginia  Stockwell    Research Plant Pathologist /ARSUserFiles/51393/Stockwell Photos/stockwell, virginia.jpg 3420 NW Orchard AveCorvallis, OR 97330(541) 738-4078
 
 ProjectsKnowledge Based Tools for Exotic and Emerging Diseases of Small Fruit and Nursery CropsIn-House Appropriated (D)Accession Number:442138Establishment and Cultivar-Specific Associations of Mycorrhizal Fungi in Newly-Turned Raspberry FieldsGrant (G)Accession Number:442902Management of Botrytis of Cut FlowersGrant (G)Accession Number:437077Determining Critical Stages for Botrytis Infection in Highbush BlueberriesGrant (G)Accession Number:444864Assessing the Role of Gnomoniopsis Idaeicola and Other Fungal Cane Blight Pathogens in Blackberry CollapseGrant (G)Accession Number:445207Monitoring Botrytis Fungicide Resistance on Blueberries in Washington and OregonGrant (G)Accession Number:440231BLUE-DYNAMO: An Interactive Platform to Deliver Blueberry Disease and Horticultural Management Strategies for Fruit RotsReimbursable Cooperative Agreement (R)Accession Number:445741Systems Approach to Managing the Expression (Same) of Cranberry Fruit RotReimbursable Cooperative Agreement (R)Accession Number:443748Prevalence of Cranberry Fruit Rots in Commercial Production Beds in Oregon and WashingtonNon-Assistance Cooperative Agreement (S)Accession Number:439056  Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)First report of Neofabraea actinidiae causing a cranberry fruit rot in Oregon-(Peer Reviewed Journal)Multiplex PCR assay for detection and identification of Gnomoniopsis idaeicola, the causal agent of blackberry collapse-(Peer Reviewed Journal) Stockwell, V.O., Shaffer, B.T. 2024. Multiplex PCR assay for detection and identification of Gnomoniopsis idaeicola, the causal agent of blackberry collapse. Plant Health Progress. https://doi.org/10.1094/PHP-09-23-0080-BR.Specific and sensitive detection tools for Xanthomonas arboricola pv. corylina, the causal agent of bacterial blight of hazelnut, developed with comparative genomics-(Peer Reviewed Journal) Stockwell, V.O., Kaluzna, M., Prokic, A., Obradovic, A., Pothier, J., Weldon, W. 2023. Specific and sensitive detection tools for Xanthomonas arboricola pv. corylina, the causal agent of bacterial blight of hazelnut, developed with comparative genomics. Frontiers in Plant Science. 14:1254107. https://doi.org/10.3389/fpls.2023.1254107.Contribution of native plasmids of Pantoea vagans C9-1 to epiphytic fitness and fire blight management on apple and pear flowers and fruits-(Peer Reviewed Journal) Stockwell, V.O., Klein-Gordon, J.M., Johnson, K.B., Loper, J.E. 2023. Contribution of native plasmids of Pantoea vagans C9-1 to epiphytic fitness and fire blight management on apple and pear flowers and fruits. Phytopathology. https://apsjournals.apsnet.org/doi/10.1094/PHYTO-04-23-0144-SA.Multiplex PCR assay for rapid identification of Monilinia rubi, the causal agent of dry-berry disease of caneberries-(Peer Reviewed Journal) Weldon, W., McGhee, G., DeLong, J.A., Stockwell, V.O. 2023. Multiplex PCR assay for rapid identification of Monilinia rubi, the causal agent of dry-berry disease of caneberries. Plant Health Progress. https://doi.org/10.1094/PHP-09-22-0095-BR.Taxonomic reclassification of the fungal pathogen causing dry berry disease of caneberries into the division Ascomycota as Monilinia rubi-(Peer Reviewed Journal) Weldon, W., McGhee, G., Jones, L.A., Stockwell, V.O. 2022. Taxonomic reclassification of the fungal pathogen causing dry berry disease of caneberries into the division Ascomycota as Monilinia rubi. Plant Disease. https://doi.org/10.1094/PDIS-11-21-2618-SR.First report of Gnomoniopsis idaeicola causing cane wilt and canker in commercial blackberry fields in Oregon-(Peer Reviewed Journal) Stockwell, V.O., Shaffer, B.T., McGhee, G., Hardigan, M.A. 2022. First report of Gnomoniopsis idaeicola causing cane wilt and canker in commercial blackberry fields in Oregon. Plant Disease. 106(7):1980. https://doi.org/10.1094/PDIS-11-21-2397-PDN.Susceptibility of some Corylus avellana L. cultivars to Xanthomonas arboricola pv. corylina-(Peer Reviewed Journal) Webber, B.J., Wada, S., Stockwell, V.O., Wiman, N.G. 2021. Susceptibility of some Corylus avellana L. cultivars to Xanthomonas arboricola pv. corylina. Frontiers in Plant Science. 12. Article 800339. https://doi.org/10.3389/fpls.2021.800339.Screening cotoneaster sp. for resistance to fire blight using foliar inoculation with two strains of erwinia amylovora-(Peer Reviewed Journal) Neill, K.E., Contreras, R.N., Stockwell, V.O., Hsuan, C. 2021. Screening cotoneaster sp. for resistance to fire blight using foliar inoculation with two strains of erwinia amylovora. HortScience. 56(7):824-830. https://doi.org/10.21273/HORTSCI15872-21.Changes in aphis regulations in interstate movement of low-risk plant pests in the continental U.S.-(Other)Improved deferred antagonism technique for detecting antibiosis-(Peer Reviewed Journal) Klein, J.M., Stockwell, V.O., Minsavage, G.V., Vallad, G.E., Goss, E.M., Jones, J.B. 2020. Improved deferred antagonism technique for detecting antibiosis. Letters in Applied Microbiology. https://doi.org/10.1111/lam.13339.Characterization of isolates of Xanthomonas arboricola pv. corylina, the causal agent of bacterial blight, from Oregon hazelnut orchards-(Peer Reviewed Journal)Assessing fire blight resistance of new Cotoneaster genotypes inoculated with Erwinia amylovora in the field-(Peer Reviewed Journal)Pantocin A, a peptide-derived antibiotic involved in biological control by plant-associated Pantoea species-(Peer Reviewed Journal) Smits, T., Duffy, B., Blom, J., Ishimaru, C., Stockwell, V.O. 2019. Pantocin A, a peptide-derived antibiotic involved in biological control by plant-associated Pantoea species. Archives Of Microbiology. 201(6):713-722. https://doi.org/10.1007/s00203-019-01647-7.Initiatives for addressing antimicrobial resistance in the environment: Current situation and challenges-(Other) Ahammad, S.Z., Arduino, M., de Roda Husman, A., Durso, L.M., Edge, T., Garber, G., Garland, J., Gaze, W., Graham, D., Kirby, A., Lapara, T., McLain, J., McDonald, C., Nappier, S., Patrick, D., Rousham, E., Stekel, D., Topp, E., Verner-Jeffreys, D., Wittum, T., Wong, A., Aga, D., Davies, J., Gandra, S., Kasprzyk-Hordern, B., Larsson, J., Snape, J., Slijkhuis, H., Sweetman, A., Voulvoulis, N., Bayen, S., Beer, K., Dirven, H., Jackson, B., Lejeune, J., Stockwell, V.O., Tiedje, J., Patel, J. 2018. Initiatives for addressing antimicrobial resistance in the environment: Current situation and challenges. Available: https://wellcome.ac.uk/sites/default/files/antimicrobial-resistance-environment-report.pdf.Fungicide resistance profiles of Botrytis cinerea isolated from berry crops in Oregon-(Abstract Only) Stockwell, V.O., Shaffer, B.T., Jones, L.A., Pscheidt, J.W. 2018. Fungicide resistance profiles of Botrytis cinerea isolated from berry crops in Oregon. Abstract for International Congress of Plant Pathology: Plant Health in A Global Economy; 2018 July 29-Aug 3; Boston, MAContribution of native plasmids to fitness and fire blight biocontrol efficacy of Pantoea vagans strain C9-1-(Abstract Only) Klein, J.M., Johnson, K.B., Loper, J.E., Stockwell, V.O. 2018. Contribution of native plasmids to fitness and fire blight biocontrol efficacy of Pantoea vagans strain C9-1. Abstract for International Congress of Plant Pathology: Plant Health in A Global Economy; 2018 July 29-Aug 3; Boston, MASecondary metabolism and interspecific competition affect accumulation of spontaneous mutants in the GacS-GacA regulatory system in Pseudomonas protegens-(Peer Reviewed Journal) Yan, Q., Lopes, L., Shaffer, B.T., Kidarsa, T.A., Vining, O., Philmus, B., Song, C., Stockwell, V.O., Raaijmakers, J., McPhail, K.L., Andreote, F., Chang, J.H., Loper, J.E. 2018. Secondary metabolism and interspecific competition affect accumulation of spontaneous mutants in the GacS-GacA regulatory system in Pseudomonas protegens. mBio. 9(1):e01845-17. https://doi.org/10.1128/mBio.01845-17.Inoculation of Malus genotypes with a set of Erwinia amylovora strains indicates a gene-for-gene relationship between the effector gene eop1 and both Malus floribunda 821 and Malus 'Evereste'-(Peer Reviewed Journal) Wöhner, T., Richter, K., Sundin, G.W., Zhao, Y., Stockwell, V.O., Sellmann, J., Flachowsky, H., Magda-Viola, H., Peil, A. 2017. Inoculation of Malus genotypes with a set of Erwinia amylovora strains indicates a gene-for-gene relationship between the effector gene eop1 and both Malus floribunda 821 and Malus 'Evereste'. Plant Pathology. 67(4):938-947. https://doi.org/10.1111/ppa.12784.Influence of endogenous plasmids on phenotypes of Pantoea vagans strain C9-1 associated with epiphytic fitness-(Peer Reviewed Journal) Klein, J.M., Loper, J.E., Stockwell, V.O. 2017. Influence of endogenous plasmids on phenotypes of Pantoea vagans strain C9-1 associated with epiphytic fitness. Journal of Plant Pathology. 99:81-89. https://doi.org/10.4454/jpp.v99i0.3914.Nutritional environment influences transcription of a pantocin A biosynthesis gene in Pantoea vagans strain C9-1-(Peer Reviewed Journal) Klein, J.M., Wong, P., Loper, J.E., Stockwell, V.O. 2017. Nutritional environment influences transcription of a pantocin A biosynthesis gene in Pantoea vagans strain C9-1. Journal of Plant Pathology. 99:99-103. https://doi.org/10.4454/jpp.v99i0.3911.Node position influences viability and contamination in hazelnut shoot-(Peer Reviewed Journal)Characterization of toxin complex gene clusters and insect toxicity of bacteria representing four subgroups of Pseudomonas fluorescens-(Peer Reviewed Journal) Rangel, L.I., Henkels, M.D., Shaffer, B.T., Walker, F.L., Davis Ii, E.W., Stockwell, V.O., Bruck, D.J., Taylor, B.J., Loper, J.E. 2016. Characterization of toxin complex gene clusters and insect toxicity of bacteria representing four subgroups of Pseudomonas fluorescens. PLoS One. 11(8):e0161120. doi: 10.1371/journal.pone.0161120.Antimicrobial stewardship through a one health lens: Observations from Washington State-(Peer Reviewed Journal) D'Angeli, M., Baker, J., Call, D., Davis, M., Kauber, K., Malhotra, U., Matsuura, G., Moore, D., Porter, C., Pottinger, P., Stockwell, V.O., Wagner, C., Wohrle, R., Yoder, J., Yoke, L., Rabinowitz, P. 2016. Antimicrobial stewardship through a one health lens: Observations from Washington State. International Journal of Health Governance Information. 21(3):114-130. doi: 10.1108/IJHG-02-2016-0009.Rhizoxin analogs, orfamide A and chitinase production contribute to the toxicity of Pseudomonas protegens strain Pf-5 to Drosophila melanogaster-(Peer Reviewed Journal) Loper, J.E., Henkels, M.D., Rangel, L.I., Olcott, M.H., Walker, F.L., Bond, K.L., Kidarsa, T.A., Hesse, C.N., Sneh, B., Stockwell, V.O., Taylor, B.J. 2016. Rhizoxin analogs, orfamide A and chitinase production contribute to the toxicity of Pseudomonas protegens strain Pf-5 to Drosophila melanogaster. Environmental Microbiology. 18(10):3509-3521. doi: 10.1111/1462-2920.13369.Epiphytic bacteria and yeasts on apple blossoms and their potential as antagonists of Erwinia amylovora-(Peer Reviewed Journal) Pusey, P.L., Stockwell, V.O., Mazzola, M. 2009. Epiphytic bacteria and yeasts on apple blossoms and their potential as antagonists of Erwinia amylovora. Phytopathology.  99:571-581.  ARS News ArticlesNo news articles listed for this employee.


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