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Brad Geary Plant & Wildlife Sciences Email: brad_geary@byu.edu 263 WIDB Assistant Professor
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| Education |
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| Research |
1- Study endophyte relationships in grass by identifying the alkaloids they produce and finding DNA fingerprints. 2- Test virulence of downy mildew isolates on differing cultivars of quinoa, also study differences between downy mildew isolates using AFLPs and sporulation data. 3- Alternaria and Aspergillus fungi are increasing the germination of Utah native seeds. We are studying the mechanisms why they increase germination and if it can be used in revegitation projects. |
| Selected Publications |
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Articles Gordillo, L.F., Stevens, M.R., Millard, M.A., and Geary, B. "Screening two Lycopersicon peruvianum collections for resistance to toomato spotted wilt virus." Plant Disease. 92.5 (2008): 694-704. Brown, B.D., Geary, B., Gibson, R.C. and Morra, M.J. "Biofumigant biomass, nutrient content, and glucosinolate response to phosphorus." Journal of Plant Nutrition. 31.4-6 (2008): 743-757. Geary, B., Ransom, C., Brown, B., Atkinson, D., and Hafez S. "Weed, disease, and nematode management in onion with biofumigants and metam sodium." Horticuluture Technology (HortTechnology). 18.4 (2008): 569-574. Geary, B., Johnson, D. A., Hamm, P. B., James, S., and Rykbost, K. A. "Potato Silver Scurf Affected by Locations and Tuber Seed Treatments, and Occurrence of Thiabendazole and Thiophanate-methyl Resistant isolates of Helminthosporium solani in Washington and Oregon." Plant Disease. Mar. 2007. Hopkins, B.G., D.A. Horneck, M.J. Pavek, B.D. Geary, N.L. Olsen, J.W. Ellsworth, G.D. Newberry, J.S. Miller, R.E. Thornton, and G.W. Harding. "Potato Production Best Management Practices." American Journal of Potato Research. Apr. 2007. Thornton, M., B. Geary and D. Beck. "The influence of Surround WP and lifting practices on storage disease, sun scorch and bulb color of red onions." Proceedings of the Idaho/Eastern Oregon Onion Growers meeting. Jan. 2007: 7. 1. Benson, J., B. Geary, B.G. Hopkins, V.D. Jolley, and J.R. Miller. "Influence of pH on Infection of Phytophthora erythroseptica on Solanum tuberosum." Phytopathology. 97 (2007): s10. Chambers, A., B. Geary, S. Black, and N. Candelaria. "Confirmation of Artificial Endophyte Inoculation in Maize (Zea mays) and Tomato (Lycopersicon esculentum) by Scanning Electron Microscopy and PCR Amplification of ITS Sequences." Phytopathology. 97 (2007): s19. Eldredge, S.D., B. Geary, and S. Jensen. "Field and Greenhouse Trials Relating Complex Soil Environments with Accelerated Germ Responses of Astragalus utahensis to Alternaria and Aspergillus fungi." Phytopathology. 97 (2007): s32. Kitz, L., G.R. Hooper, M.R. Stevens, and B. Geary. "Visualization of Peronospora farinosa infection and growth in quinoa using scanning electron microscopy." Phytopathology. 97 (2007): s57. 5. Stevens, M.R., E.M. Swenson, B. Geary, A. Bonifacio, G. Plata, P.J. Maughan, E.N. Jellen, C.E. Coleman, L. Kitz, J. Cobb, and D.J. Fairbanks. "Studies on Quinoa Downy Mildew (Peronospora farinosa) Host Resistance and Pathogen Diversity in Bolivia." Quinoa Congress. 2007. 6. Kitz, L., E.M. Swenson, B. Geary, A. Bonifacio, G. Plata, and MR. Stevens. "Evidence of Genetic Diversity Among Isolates of Peronospora farinose f. sp. chenopodii Using AFLP Analysis." Plant and Animal Genomes XV Conference. Jan. 2007. Geary, B. and D. A. Johnson. "Relationship Between Silver Scurf Levels on Seed and Progeny Tubers from Successive Generations of Potato Seed." American J. Potato Research. Dec. 2006. 1. Geary, B., J. Benson, S. Wood, J. Logan, B. Broulotte, A. Chambers, J. Maughan, and M. Stevens. "Profiling of Physical and Molecular Characteristics in Neotyphodium Isolates." ASHS 41(4):1035. July 2006. Geary, B., D. Beck, and M. Thornton. "Bulb-to-Bulb Transmission of Botrytis allii in Dry Bulb Onion Production." ASHS 41(4):1064. July 2006. Geary, B., B. Brown, C. Ransom, and S. Hafez. "Biofumigants in Commercial Onion Production to Control Weed, Nematode and Disease Pests." Second International Biofumigation Symposium. June 2006. Brown, B., B. Geary, M. Morra, and R. Borek. "Biofumigant Response to Phosphorus." Second International Biofumigation Symposium. June 2006. 5. Stevens, M.R., J.W. Scott, J.J. Cho, B.D. Geary, and F.D. Memmott. "A New Dominantly Inherited Source of TSWV Resistance in Tomato Derived from L. chilense, which Resists Isolates that Overcome Sw-5." ASHS 41(4):991. July 2006. 6. Swenson, E.M., B. Geary, G. Plata, A. Bonifacio, P.J. Maughan, E.N. Jellen, C.E. Coleman, D.J. Fairbanks, and M.R. Stevens. "AFLP Fingerprints for Isolates of Peronospora farinosa f.sp. chenopodii (Downy Mildew) in Quinoa from the Andes of South America." Plant and Animal Genomes XIV Conference. Jan. 2006. 7. Jarvis, D.E., P.J. Maughan, M.R. Stevens, C.E. Coleman, B.D. Geary, A. Bonifacio, D.J. Fairbanks, M.B. Balzotti, S.A. Christensen, B.A. Kolano, J. Maluszynska , E.M. Larson, S.L. Mason, C. Pratt , M.D. Ricks, and E.N. Jellen. "The Development of Molecular Tools for Improvement of Quinoa (Chenopodium quinoa Wild.)." Plant and Animal Genomes XIV Conference. Jan. 2006. Eldredge, S., B. Geary, S. Jensen and J. Gardner. "Mechanisms of Accelaerated Germination of Astragalus utahensis with Aspergillus and Alternaria Fungi." Phytopathology 96:S32. Aug. 2006. Chambers, A.H., J. Benson, and B. Geary. "AFLP Genetic Analysis of Eleven Uniques Endophytes Isolated from Festuca pratensis and Lolium prenne Grass Varieties." Phytopathology 96:S20. Aug. 2006. 10. Swenson, E.M., B. Geary, G. Plata, A. Bonifacio, P.J. Maughan, E.N. Jellen, C.E. Coleman, D.J. Fairbanks, and M.R. Stevens. "Genetic diversity of Bolivian Peronospora farinosa f.sp. chenopodii (downy mildew) and quinoas resistance response." Phytopathology 96:S112. Aug. 2006. Cobb, J.N., B.D. Geary, A.J. Fisher, and M.R. Stevens. "Effective Protoplasing of Neotyphodium Endophytes in Forage Grasses." Phytopathology 96:S25. Aug. 2006. Eldredge, S., B. Geary, J. Gardner, and S. Jensen. "Viability of an accelerated germ response of fungal inoculated Astragalus utahensis seed in soil." 51st Annual Meeting of the Agronomy Soil Crop Science Society of America. Nov. 2006. Beck, D., M. Thornton, and B. Geary. "Factors Influencing Development of Neck Rot in Stored Onions." National Allium Research Conference. Dec. 2006. Geary, B., P.B. Hamm, and D.A. Johnson. "Deposition and Redistribution of Fungicides Applied by Air and Chemigation for Control of Late Blight in Commercials Potato Fields." American J. Potato Research. 81 (2004): 305-315. Johnson, D. A., Cummings, T. F., and Geary, B. "Post infection activity of selected late blight fungicides." Plant Disease. Sep. 2000. Geary, B., Johnson, D. A., Hamm, P. B., and Cummings, T. F. "Fungicide applications for late blight management: A boom attached to a center pivot irrigation system." Plant Disease. May 1999. Books Nolte, P., J.S. Miller, B, GEARY, and D. Corsini. Disease Management. Potato Production Systems. University of Idaho agricultural publications, Oct. 2003. |
| Awards |
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| Courses Taught |
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PAS 494R
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Mentored Learning Experience
PAS 699R : Master's Thesis PWS 697R : Research PDBIO 120 : Science of Biology PWS 331 : Sci of Plant & Pest Control PWS 431 : Integrated Mgt of Plant Pests PWS 494R : Mentored Learning Experience PWS 699R : Master's Thesis |