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                    U.S. DEPARTMENT OF AGRICULTURE
 Crops Pathology and Genetics Research: Davis, CA
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Greg  Browne    Research Plant Pathologist **Phone:**
(530) 754-9351**Fax:**
(530) 754-7195**Office:**
University of California, Davis
3202 Storer Hall
Davis, CA 95616
 /ARSUserFiles/693/greg browne.jpeg
 Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Random forest analysis reveals taxa predictive of Prunus replant disease in peach root microbiomes-(Peer Reviewed Journal) Khan, A.R., Wicaksono, W., Ott, N.J., Poret-Peterson, A.T., Browne, G.T. 2022. Random forest analysis reveals taxa predictive of Prunus replant disease in peach root microbiomes. PLOS ONE. 17(10). Article e0275587. https://doi.org/10.1371/journal.pone.0275587.Characterization of soils conducive and non-conducive to Prunus replant disease-(Peer Reviewed Journal) Khan, A.R., Wicaksono, W., Ott, N.J., Poret-Peterson, A.T., Browne, G.T. 2021. Characterization of soils conducive and non-conducive to Prunus replant disease. PLoS ONE. 16(12). Article e0260394. https://doi.org/10.1371/journal.pone.0260394.A rapid in vitro phenotypic assay of walnut shoots for prescreening resistance of Phytophthora pini-(Peer Reviewed Journal) Zaini, P.A., Lee, S.H., Leslie, C.A., Walawage, S.L., Jiang, C., Browne, G.T., Dandekar, A.M., Kasuga, T. 2021. A rapid in vitro phenotypic assay of walnut shoots for prescreening resistance of Phytophthora pini. Plant Health Progress. 22(3):235-239. https://doi.org/10.1094/PHP-05-21-0078-FI.Co-located quantitative trait loci for resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi, and P. pini in Juglans microcarpa × J. regia hybrid rootstock-(Peer Reviewed Journal) Ramasamy, R.K., Luo, M., Leslie, C.A., Velasco, D.M., Ott, N.J., McClean, A.E., Dandekar, A.M., Aradhya, M.K., Brown, P.J., Browne, G.T., Kluepfel, D.A., Westphal, A., Dvorak, J. 2021. Co-located quantitative trait loci for resistance to Agrobacterium tumefaciens, Phytophthora cinnamomi, and P. pini in Juglans microcarpa × J. regia hybrid rootstock. Horticulture Research. 8. Article 111. https://doi.org/10.1038/s41438-021-00546-7.Flooding by California rivers results in walnut scion infections by species of Phytophthora-(Peer Reviewed Journal) Browne, G.T., Hasey, J.K., Ott, N.J., Forbes, H., Arnold, K., Milliron, L.K. 2021. Flooding by California rivers results in walnut scion infections by species of Phytophthora. Plant Health Progress. https://doi.org/10.1094/PHP-02-20-0011-RS.First report of Phytophthora chlamydospora causing crown and root rot on almond in California-(Peer Reviewed Journal) Browne, G.T., Ott, N.J., Forbes, H., Yaghmour, M.A., Milliron, L.K. 2020. First report of Phytophthora chlamydospora causing crown and root rot on almond in California. Plant Disease. 104(7):2033. https://doi.org/10.1094/PDIS-10-19-2072-PDN.First report of Phytopythium helicoides causing root rot on peach rootstock in California-(Peer Reviewed Journal) Browne, G.T., Ott, N.J., Fichtner, E. 2019. First report of Phytopythium helicoides causing root rot on peach rootstock in California. Plant Disease. 103(11):2968. https://doi.org/10.1094/PDIS-09-18-1697-PDN.Anaerobic soil disinfestation as an alternative to soil fumigation for management of Prunus replant disease: effects on tree growth and yield-(Peer Reviewed Journal) Browne, G.T., Ott, N.J., Poret-Peterson, A.T., Lampinen, B.D., Metcalf, S.G., Yaghmour, M.A., Holtz, B.A., Culumber, M., Brar, G., Doll, D.A. 2018. Anaerobic soil disinfestation as an alternative to soil fumigation for management of Prunus replant disease: effects on tree growth and yield. Acta Horticulturae. 1219:287-294. https://doi.org/10.17660/ActaHortic.2018.1219.44.Temporal occurrence and niche preferences of Phytophthora spp. causing brown rot of citrus in the Central Valley of California-(Peer Reviewed Journal) Hao, W., Miles, T.D., Martin, F.N., Browne, G.T., Forster, H., Adaskaveg, J.E. 2018. Temporal occurrence and niche preferences of Phytophthora spp. causing brown rot of citrus in the Central Valley of California. Phytopathology. 108(3):384-391. https://doi.org/10.1094/PHYTO-09-17-0315-R.Efficacy of anaerobic soil disinfestation for control of Prunus replant disease-(Peer Reviewed Journal) Browne, G.T., Ott, N.J., Poret-Peterson, A.T., Gouran, H., Lampinen, B.D. 2018. Efficacy of anaerobic soil disinfestation for control of Prunus replant disease. Plant Disease. 102:209-218. https://doi.org/10.1094/PDIS-09-16-1392-RE.First report of root rot caused by Phytopythium helicoides on pistachio rootstock in California-(Peer Reviewed Journal) Fitchtner, E.J., Browne, G.T., Mortaz, M., Ferguson, L., Blomquist, C.L. 2016. First report of root rot caused by Phytopythium helicoides on pistachio rootstock in California. Plant Disease. http://dx.doi.org/10.1094/PDIS-12-15-1424-PDN.Development of disease-resistant walnut rootstocks: Integration of conventional and genomic approaches (SCRI-match Year 3)-(Proceedings) Kluepfel, D.A., Leslie, C., Aradhya, M.K., Browne, G.T., Hasey, J., Pope, K., Mckenry, M., Westphal, A., Hackett, W., Bostock, R., Seybold, S., Dvorak, J., Luo, M., Coggeshall, M., Schlarbaum, S., Dandekar, A., Neale, D., Langley, C., Preece, J.E., Baumgartner, K. 2016. Development of disease-resistant walnut rootstocks: Integration of conventional and genomic approaches (SCRI-match Year 3). Walnut Research Conference. Walnut Research Reports 2015: 87-91.Minimize emissions and improve efficacy with low permeability tarp and deep injection in soil fumigation-(Abstract Only) Gao, S., Doll, D., Qin, R., Rana Dangi, S., Hanson, B., Gerik, J.S., Browne, G.T., Wang, D. 2015. Minimize emissions and improve efficacy with low permeability tarp and deep injection in soil fumigation. Almond Industry Conference Proceedings. p.57.Fumigation efficacy and emission reduction using low-permeability film in orchard soil fumigation-(Peer Reviewed Journal) Gao, S., Hanson, B.D., Cabrera, J.A., Sosnoskie, L., Qin, R., Gerik, J.S., Wang, D., Browne, G.T., Thomas, J. 2015. Fumigation efficacy and emission reduction using low-permeability film in orchard soil fumigation. Pest Management Science. doi: 10.1002/ps.3993.Effect of anaerobic soil disinfestation and vermicompost on soilborne phytopathogenic agents under tree-crop nursery conditions-(Abstract Only)Development of disease-resistant walnut rootstocks: Integration of conventional and genomic approaches-(Proceedings) Kluepfel, D.A., Browne, G.T., Mckenry, M., Hasey, J., Leslie, C., Aradhya, M.K., Hackett, W., Preece, J.E., Bostock, R., Seybold, S. 2014. Development of disease-resistant walnut rootstocks: Integration of conventional and genomic approaches. Walnut Research Conference. 77-87.A clean start to productive orchards and vineyards: recent research on methyl bromide alternatives for perennial crop nurseries-(Peer Reviewed Journal) Hanson, B.D., Gao, S., Gerik, J.S., Qin, R., Cabrera, A.J., Jhala, A., Abit, J., Wang, D., Browne, G.T. 2013. A clean start to productive orchards and vineyards: recent research on methyl bromide alternatives for perennial crop nurseries. California Agriculture. 67(3):181-189.Totally impermeable film (TIF) reduces emissions in perennial crop fumigation-(Peer Reviewed Journal) Gao, S., Qin, R., Cabrera, A., Hanson, B.D., Gerik, J.S., Wang, D., Browne, G.T. 2013. Totally impermeable film (TIF) reduces emissions in perennial crop fumigation. California Agriculture. 67(3):217-222.Tractor-mounted, GPS-based spot fumigation system manages Prunus replant disease-(Peer Reviewed Journal) Udompetaikul, V., Coates, R.W., Upadhyaya, S.K., Browne, G.T., Shafii, M., Gillis, M. 2013. Tractor-mounted, GPS-based spot fumigation system manages Prunus replant disease. California Agriculture. 67(4):222-227.Managing the almond and stone fruit replant disease complex with less soil fumigant-(Peer Reviewed Journal) Browne, G.T., Lampinen, B.D., Holtz, B.A., Doll, D.A., Upadhyaya, S.K., Schmidt, L.S., Bhat, R.G., Udompetailkul, V., Coates, R.W., Hanson, B.D., Klonsky, K.M., Gao, S., Wang, D., Gillis, M., Gerik, J.S., Johnson, R.A. 2013. Managing the almond and stone fruit replant disease complex with less soil fumigant. California Agriculture. 67(3):128-138.TIF film, substrates and nonfumigant soil disinfestation maintain fruit yields-(Peer Reviewed Journal) Fennimore, S.A., Serohijos, R., Samtani, J.B., Ajwa, H.A., Subbarao, K.V., Martin, F.N., Daugovish, O., Legard, D., Browne, G.T., Muramoto, J., Shennan, C., Klonsky, K. 2013. TIF film, substrates and nonfumigant soil disinfestation maintain fruit yields. California Agriculture. 67(3):139-145.Preplant 1,3-D treatments test well for perennial crop nurseries,but challenges remain-(Peer Reviewed Journal) Hanson, B.D., Gao, S., Gerik, J.S., Qin, R., Cabera, J.A., Jahala, A.J., Abit, J., Cox, D., Correiar, B., Wang, D., Browne, G.T. 2013. Preplant 1,3-D treatments test well for perennial crop nurseries,but challenges remain. California Agriculture. 67(3):179.Evaluating paradox walnut rootstocks for resistance to Armillaria root disease-(Peer Reviewed Journal) Baumgartner, K., Fujiyoshi, P.T., Browne, G.T., Leslie, C., Kluepfel, D.A. 2013. Evaluating paradox walnut rootstocks for resistance to Armillaria root disease. HortScience. 48:68-72.Minimize emission and improve efficacy with low permeability tarp in soil fumigation for perennials-(Proceedings) Gao, S., Qin, R., Cabrera, A., Gerik, J.S., Hanson, B.D., Sosnoskie, L., Wang, D., Browne, G.T. 2012. Minimize emission and improve efficacy with low permeability tarp in soil fumigation for perennials. International Conference on Methyl Bromide Alternatives and Emissions Reductions. p. 6-1 - 6-3..Identification of tree-crop rootstocks with resistance to Armillaria root disease.-(Abstract Only) Baumgartner, K., Fujiyoshi, P.T., Kluepfel, D.A., Browne, G.T., Leslie, C. 2012. Identification of tree-crop rootstocks with resistance to Armillaria root disease.. American Phytopathological Society Abstracts. 23-0.Methods to facilitate the adoption of alternatives to methyl bromide soil fumigation by California strawberry growers-(Peer Reviewed Journal) Fennimore, S.A., Serohijos, R., Samtani, J., Ajwa, H.A., Subbarao, K., Martin, F.N., Daugovish, O., Legard, D., Browne, G.T., Muramoto, J., Shennan, C., Klonsky, K. 2013. Methods to facilitate the adoption of alternatives to methyl bromide soil fumigation by California strawberry growers. California Agriculture. 67:139-146.The quest to identify disease resistance in the USDA-ARS Juglans germplasm collection-(Peer Reviewed Journal) Kluepfel, D.A., Aradhya, M.K., Browne, G.T., Mckenry, M.V., Leslie, C.A., Mcclean, A.E., Moersfelder, J.W., Velasco, D.M., Baumgartner, K. 2012. The quest to identify disease resistance in the USDA-ARS Juglans germplasm collection. Acta Horticulturae. 948:105-111.Clonal propagation of walnut rootstock genotypes for genetic improvement 2011-(Proceedings) Clonal propagation of walnut rootstock genotypes for genetic improvement 2011. Walnut Research Conference. 2011:103-128.Minimize Emissions and Improve Efficacy of Soil Fumigations with Tarping of TIF-(Abstract Only) Gao, S., Hansen, B.D., Cabrera, A., Qin, R., Gerik, J.S., Wang, D., Browne, G.T. 2011. Minimize Emissions and Improve Efficacy of Soil Fumigations with Tarping of TIF. Almond Industry Conference Proceedings. p. 66.Resistance to phytophthora and graft compatibility with persian walnut among seedlings of chinese wingnut from different sources-(Peer Reviewed Journal) Browne, G.T., Grant, J.A., Schmidt, L.S., Leslie, C.A., Mcgranahan, G.H. 2011. Resistance to phytophthora and graft compatibility with persian walnut among seedlings of chinese wingnut from different sources. HortScience. 46:371-376.Application Of Low Permeability Tarp In Perennial Field Fumigation-(Proceedings) Gao, S., Qin, R., Cabrera, A., Hanson, B., Gerik, J.S., Wang, D., Browne, G.T. 2011. Application Of Low Permeability Tarp In Perennial Field Fumigation. International Conference on Methyl Bromide Alternatives and Emissions Reductions, San Diego, California, October 31-November 2, 2011. p. 74.1-74.4.Methyl bromide alternatives for grape replant-(Proceedings) Wang, D., Cabrera, A., Gerik, J.S., Gao, S., Hanson, B., Browne, G.T., Klonsky, K., Vasquez, S. 2011. Methyl bromide alternatives for grape replant. International Conference on Methyl Bromide Alternatives and Emissions Reductions, San Diego, California, October 31-November 2, 2011. p. 30.1-30.3.Characterization of Cylindrocarpon populations associated with replant disease of almond and peach-(Abstract Only) Schmidt, L.S., Bhat, R.G., Browne, G.T. 2011. Characterization of Cylindrocarpon populations associated with replant disease of almond and peach. Phytopathology. 101:S160.Quantification of Cylindrocarpon in roots of almond and peach trees from orchards affected by Prunus replant disease-(Abstract Only) Bhat, R.G., Schmidt, L.S., Browne, G.T. 2011. Quantification of Cylindrocarpon in roots of almond and peach trees from orchards affected by Prunus replant disease. Phytopathology. 101:S15.Evaluation of phosphonate treatments for control of phytophthora crown rot of walnut-(Peer Reviewed Journal) Browne, G.T., Schmidt, L.S., Prichard, T.J., Krueger, W.H. 2011. Evaluation of phosphonate treatments for control of phytophthora crown rot of walnut. Plant Health Progress. doi:10.1094/PHP-2011-0601-01-RS.Clonal Propagation of walnut rootstock genotypes for genetic improvement 2010-(Proceedings) Hackett, W., Leslie, C., Grant, J., Lampinen, B., Mcgranahan, G., Anderson, K., Beede, B., Buchner, R., Caprile, J., Debuse, C., Hasey, J., Manterola, N., Robinson, R., Kluepfel, D.A., Browne, G.T., Mckenry, M. 2011. Clonal Propagation of walnut rootstock genotypes for genetic improvement 2010. Walnut Research Conference. 2010:65-82.Demonstration of low permeability tarp technology in soil fumigation for perennials-(Proceedings) Gao, S., Qin, R., Cabrera, L., Hanson, B.D., Gerik, J.S., Wang, D., Browne, G.T. 2010. Demonstration of low permeability tarp technology in soil fumigation for perennials. Methyl Bromide Alternatives and Emissions Research Conference Proceedings. p.26-1 - 26-4.Evaluation of non-fumigant alternatives to methyl bromide for weed control and crop yield in California strawberries (Fragaria ananassa L.)-(Peer Reviewed Journal) Samtani, J.B., Ajwa, H.A., Weber, J.B., Browne, G.T., Klose, S., Hunzie, J., Fennimore, S.A. 2011. Evaluation of non-fumigant alternatives to methyl bromide for weed control and crop yield in California strawberries (Fragaria ananassa L.). Crop Protection. 30:45-51.Lateral movement of soil fumigants 1,3-Dichloropropene and Chloropicrin from treated agricultural fields-(Peer Reviewed Journal) Wang, D., Gao, S., Qin, R., Browne, G.T. 2010. Lateral movement of soil fumigants 1,3-Dichloropropene and Chloropicrin from treated agricultural fields. Journal of Environmental Quality. 39:1800-1806.Etiology and management of crown and root rots of walnut-(Research Technical Update) Browne, G.T., Schmidt, L.S., Bhat, R., Leslie, C., Hackett, W., Beede, R., Hasey, J. 2011. Etiology and management of crown and root rots of walnut. Walnut Research Conference. pp.225-236.Methods evaluated to minimize emissions from preplant soil fumigation-(Review Article) Gao, S., Hanson, B.D., Wang, D., Browne, G.T., Qin, R., Ajwa, H., Yates, S.R. 2011. Methods evaluated to minmize emissions from preplant soil fumigation.  California Agriculture. 65(1):41-46.Update of film permeability measurements for USDA-ARS Area-Wide Research Project-(Proceedings) Yates, S.R., Chellemi, D.O., Wang, D., Gao, S., Browne, G.T. 2009. Update of film permeability measurements for USDA-ARS Area-Wide Research Project. Proceedings of International Research Conference on Methyl Bromide Alternatives.Measurement and Assessment of Field Emission Reductions-(Proceedings) Gao, G., R. Qin, B. Hanson, D. Wang, G. Browne, and J. Gerik. 2009. Measurement and assessment of field emission reductions. International Conference on MeBr Alternatives and Emission Reductions. November 10-13, 2009, San Diego, CA. In 2009 Ann. Int. Res. Conf. on MeBr Alternatives and Emission Reductions, San Diego, Nov. 10-13, 2009. p. 9-1 to 9-3.Alternatives to Methyl Bromide Soil Fumigation for Vineyard Replant-(Proceedings) Wang, D., J.Gerik, S.Gao, B.Hanson, R.Qin, G.Browne, S.Vasquez. 2009. Alternatives to Methyl Bromide Soil Fumigation for Vineyard Replant. Page 35:1-3, In 2009 "International Conference on Methyl Bromide Alternatives and Emissions Reductions", San Diego, CA.Spot Fumigation: Fumigant Gas Dispersion and Emission Characteristics-(Peer Reviewed Journal) Wang, D., G. Browne, S. Gao, B. Hanson, J. Gerik, R. Qin, N. Tharayil. 2009. Spot fumigation: fumigant gas dispersion and emission characteristics. Environ. Sci. Technol. 43:5783-5789.Design, development and evaluation of a tree planting-site-specific fumigant applicator-(Peer Reviewed Journal) Upadhyaya, S.S., Udompetaikul, V., Shafii, M.S., Browne, G.T. 2009. Design, development and evaluation of a tree planting-site-specific fumigant applicator. Acta Horticulturae. 824:281-288.WEED COMMUNITY COMPOSITION IN TREE FRUIT NURSERIES TREATED WITH METHYL BROMIDE AND ALTERNATIVE FUMIGANTS-(Peer Reviewed Journal) Shrestha, A., Browne, G.T., Lampinen, B.D., Schneider, S.M., Trout, T.J. 2009. WEED COMMUNITY COMPOSITION IN TREE FRUIT NURSERIES TREATED WITH METHYL BROMIDE AND ALTERNATIVE FUMIGANTS. International Journal of Fruit Science. 9(1):78-91.Innoculation of Almond Rootstock with Symbiotic Arbuscular Mycorrhizal Fungi-(Proceedings) Hua, S.T., Browne, G.T., Ledbetter, C.A. 2008. Innoculation of Almond Rootstock with Symbiotic Arbuscular Mycorrhizal Fungi. Almond Industry 2008 Conference Proceedings. p.91-94.DYNAMIC FLUX CHAMBER SYSTEMS FOR FUMIGANT EMISSION MEASUREMENTS-(Proceedings) Gao, S, D. Wang, T. Pflaum, R.Qin, B. Hanson, G. Browne, H. Ajwa, and S. Yates. Dynamic flux chamber systems for fumigant emission measurements. Ann. Int. Res. Conf. on MeBr Alternatives and Emission Reductions, San Diego, Nov. 11-15, 2008. pp. 21-1 to 21-4.METHYL BROMIDE ALTERNATIVES FOR VINEYARD REPLANT-(Proceedings) Wang, D., S.Gao,J.S. Gerik, B.D.Hanson, N. Tharayil, R. Qin, G.T. Browne, C. Smith, K. Klonsky, B. Westerdahl, S. Vasquez, S.R. Yates. 2008. Methyl Bromide Alternatives for Vineyard Replant. International Conference on Methyl Bromide Alternatives and Emissions Reductions. 14:1-3.DISPERSION OF REACTIVE FUMIGANT GASES IN SOIL-(Abstract Only) Wang,D.,N. Tharayil, R. Qin, S. Gao, B.D. Hanson, J. Gerik, G.T.Browne. 2008. Dispersion of Reactive Fumigant Gases in Soil. Agronomy Abstract (662-8), ASA-CSSA-SSSA, Madison, WI.PERENNIAL CROP NURSERIES TREATED WITH METHYL BROMIDE AND ALTERNATIVE FUMIGANTS: EFFECTS ON WEED SEED VIABILITY, WEED DENSITIES, AND TIME REQUIRED FOR HAND WEEDING-(Peer Reviewed Journal) Shrestha, A., Browne, G.T., Lampinen, B.D., Schneider, S.M., Simon, L., Trout, T.J. 2008. Perennial crop nurseries treated with methyl bromide and alternative fumigants: effects on weed seed viability, weed densities, and time required for hand weeding. Weed Technology. 22:267-274PERENNIAL CROP NURSERIES TREATED WITH METHYL BROMIDE AND ALTERNATIVE FUMIGANTS: EFFECT ON WEED COMMUNITY COMPOSTION-(Peer Reviewed Journal) Shrestha, A., Browne, G.T., Lampinen, B.D., Schneider, S.M., Simon, L., Trout, T.J. 2008. PERENNIAL CROP NURSERIES TREATED WITH METHYL BROMIDE AND ALTERNATIVE FUMIGANTS: EFFECT ON WEED COMMUNITY COMPOSTION. Weed Technology 22:267-274METHYL BROMIDE ALTERNATIVES FOR CALIFORNIA STRAWBERRY NURSERIES-(Peer Reviewed Journal) Fennimore, S.A., Duniway, J.M., Browne, G.T., Martin, F.N., Ajwa, H.A., Westerdahl, B.B., Goodhue, R.E., Haar, M., Winterbottom, C.Q. 2008. Methyl bromide alternatives for california strawberry nurseries. California Agriculture. April-June 2008:62-67COMPONENTS OF GENETIC VARIATION FOR RESISTANCE OF STRAWBERRY TO PHYTOPHTHORA CACTORUM ESTIMATED USING SEGREGATING SEEDLING POPULATIONS AND THEIR PARENT GENOTYPES-(Peer Reviewed Journal) Shaw, D.V., Hansen, J., Browne, G.T., Shaw, S.M. 2008. Components of genetic variation for resistance of strawberry to phytophthora cactorum estimated using segregating seedling populations and their parent genotypes. Plant Pathology. 57:210-215.GENETIC DIVERSITY IN POPULATIONS OF PHYTOPHTHORA CITRICOLA ASSOCIATED WITH HORTICULTURAL CROPS IN CALIFORNIA-(Peer Reviewed Journal) Bhat, R.G., Browne, G.T. 2007. Genetic diversity in populations of phytophthora citricola associated with horticultural crops in california. Plant Disease. 91:1556-1563Innoculation of Almond Rootstock with Symbiotic Arbuscular Mycorrhizal Fungi-(Proceedings) Hua, S.T., Browne, G.T., Ledbetter, C.A. 2007. Innoculation of Almond Rootstock with Symbiotic Arbuscular Mycorrhizal Fungi. Meeting Proceedings.Methyl Bromide Alternatives for Vineyard Replant-(Proceedings) Wang, D., Gao, S., Gerik, J.S., Hanson, B.D., Smith, C., Klonsky, K., Westerdahl, B., Browne, G.T., Yates, S.R. 2007. Methyl Bromide Alternatives for Vineyard Replant. International Conference on Methyl Bromide Alternatives and Emissions Reductions.PATHOGENIC PHYTOPHTHORA SPECIES IN SAN JOAQUIN VALLEY IRRIGATION WATER SOURCES-(Abstract Only)DEVELOPMENT OF AN IMPROVED PCR-BASED TECHNIQUE FOR DETECTION OF PHYTOPHTHORA CACTORUM IN STRAWBERRY PLANTS-(Abstract Only)SELECTION OF RESISTANCE TO PHYTOPHTHORA CITRICOLA AMONG DIVERSE CLONES OF HYBRID WALNUT ROOTSTOCKS-(Abstract Only)EFFECT OF SOLARIZATION ON SURVIVAL OF COLLETOTRICHUM ACUTATUM AND PHYTHOPHTHORA CACTORUM, CAUSAL AGENTS OF CROWN ROTS OF STRAWBERRY IN CALIFORNIA-(Abstract Only)DETERMINING PHYTOPHTHORA RESISTANCE IN ELITE PARADOX CLONES AND SPECIFIC ETIOLOGY OF A PARADOX CROWNE AND ROOT ROT-(Abstract Only) Browne, G.T., Hackett, W., Krueger, W., Connell, J., Olsen, B., Lampinen, B., Mclaughlin, S., Lee, R., Potter, D., Grant, J., Mcgranahan, G., Leslie, C., Bujazha, D. 2005. Determining phytophthora resistance in elite paradox clones and specific etiology of a paradox crowne and root rot. Walnut Research Conference.EXAMINATION OF SYMPTOMS AND CONTROL MEASURES FOR REPLANT DISEASE OF ALMOND AND PEACH IN CALIFORNIA-(Peer Reviewed Journal)Initiation of a USDA, ARS Area-Wide Methyl Bromide Alternatives Pest Management Project-(Abstract Only) Chellemi, D.O., Browne, G.T. 2005. Initiation of a USDA, ARS Area-Wide Methyl Bromide Alternatives Pest Management Project. Proceedings of Methyl Bromide Alternatives Conference.Genetic and pathogenic variability in Phytophthora cactorum affecting fruit and nut crops in California-(Popular Publication) Bhat, R., Colowit, P.M., Tai, T., Aradhya, M.K., Browne, G.T. 2006. Genetic and pathogenic variability in Phytophthora cactorum affecting fruit and nut crops in California. Plant Disease. 90: 161-169.ALTERNATIVES TO METHYL BROMIDE FOR STRAWBERRY RUNNER PLANT PRODUCTION-(Peer Reviewed Journal) Kabir, Z., Fennimore, S., Duniway, J., Martin, F.N., Browne, G.T., Winterbottom, C., Ajwa, H.A., Westerdahl, B.B., Goodhue, R.E., Haar, M.J. 2005. Alternatives to methyl bromide for strawberry runner plant production. Hortscience. 40(6):1709-1715.ROOT DISEASE OF GRAPEVINES IN CALIFORNIA AND THEIR CONTROL-(Proceedings) Gubler, W.D., Baumgartner, K., Browne, G.T., Eskalen, A., Rooney Latham, S., Petit, E., Bayramian, L.A. 2004. Root disease of grapevines in california and their control. Australian Plant Pathology.BIOLOGY AND MANAGEMENT OF REPLANT DISORDER AND LETHAL PHYTOPHTHORA CANKER-(Proceedings) Kluepfel, D.A., Browne, G.T. Biology and management of replant disorder and lethal phytophthora canker. Almond Industry Conference Proceedings. 2004ALTERNATIVES TO METHYL BROMIDE - THE CHALLENGE OF FIELD NURSERIES AND PERENNIAL CROPS.-(Proceedings) Schneider, S.M., Trout, T.J., Gerik, J.S., Browne, G.T., Ajwa, H.A. 2004. Alternatives to methyl bromide - the challenge of field nurseries and perennial crops.. Organization of Nematologists of Tropical America.  Nematropica 34:114-115.VINEYARD REPLANT - PERFORMANCE OF METHYL BROMIDE ALTERNATIAVES OVER TIME.-(Proceedings) Schneider, S.M., Trout, T.J., Browne, G.T., Ajwa, H.A., Sims, J. 2004. Vineyard replant - performance of methyl bromide alternatiaves over time.. Methyl Bromide Alternatives and Emissions Research Conference Proceedings.  pp 8-1 to 8-5.DISTRIBUTION AND DISSIPATION OF 1,3-D AND CHLOROPICRIN AFTER SHANK AND DRIP APPLICATIONS IN A CLAY LOAM SOIL-(Proceedings) Gao, S., Trout, T.J., Schneider, S.M., Ajwa, H., Browne, G.T. 2004. Distribution and dissipation of 1,3-d and chloropicrin after shank and drip applications in a clay loam soil. Proceedings of International Research Conference on Methyl Bromide Alternatives, pp 801-804.EFFECTS OF PRE-PLANT FALLOW AND CROP ROTATIONS ON SEVERITY OF PRUNUS REPLANT DISEASE-(Abstract Only) Browne, G.T., Schneider, S.M., Trout, T.J. 2004. Effects of pre-plant fallow and crop rotations on severity of prunus replant disease. Phytopathology.ROOT DISEASE OF GRAPEVINES IN CALIFORNIA AND THEIR CONTROL-(Proceedings) Gubler, W., Baumgartner, K., Browne, G.T., Eskalen, A., Latham, S., Petit, E., Bayramian, L. 2004. Root disease of grapevines in california and their control. Proceedings of the Australian Society of Soil Science Conference.STRAWBERRY YIELD UNDER REDUCED APPLICATION RATES OF CHLOROPICRIN AND INLINE IN COMBINATION WITH METAM SODIUM AND VIF.-(Abstract Only) AJWA, H.A., FENNIMORE, S., KABIR, Z., DUNIWAY, J., BROWNE, G.T., TROUT, T.J., GOODHUE, R., GUERRERO, L.  2003.  STRAWBERRY YIELD UNDER REDUCED APPLICATION RATES OF CHLOROPICRIN AND INLINE IN COMBINATION WITH METAM SODIUM AND VIF.. INTERNATIONAL CONFERENCE ON METHYL BROMIDE ALTERNATIVES AND EMISSIONS REDUCTIONS.  Annual International Research Conference on Methyl Bromide Alternatives and Emissions Reductions, November 3-6, 2003, pp 2-1 - 2-2.VINEYARD REPLANT FIELD TRIALS-(Proceedings) SCHNEIDER, S.M., TROUT, T.J., BROWNE, G.T., AJWA, H.A., SIMS, J. VINEYARD REPLANT FIELD TRIALS. INTERNATIONAL CONFERENCE ON METHYL BROMIDE ALTERNATIVES AND EMISSIONS REDUCTIONS. 2003.PRE-PLANT CROPPING AND FALLOWING EFFECTS ON SEVERITY OF PRUNUS REPLANT DISEASE-(Proceedings) Browne, G.T., Trout, T., Becherer, H.E., Mclaughlin, S., Lee, R., Gartung, J., Gillis, M., Schneider, S., Bullock, R. 2003. Pre-plant cropping and fallowing effects on severity of prunus replant disease. Proceedings of Methyl Bromide Alternatives Conference.INTEGRATED MANAGEMENT OF PHYTOPHTHORA ON STRAWBERRY WITHOUT METHYL BROMIDE-(Proceedings) Browne, G.T., Becherer, H.E., Mclaughlin, S., Fennimore, S., Duniway, J., Martin, F., Ajwa, H., Winterbottom, C., Guerrero, L. 2003. Integrated management of phytophthora on strawberry without methyl bromide. Proceedings of Methyl Bromide Alternatives Conference.ALTERNATIVES TO METHYL BROMIDE FOR VINEYARD REPLANT - RESULTS OF FIELD TRIALS.-(Abstract Only) SCHNEIDER, S.M. ALTERNATIVES TO METHYL BROMIDE FOR VINEYARD REPLANT - RESULTS OF FIELD TRIALS.. AMERICAN PHYTOPATHOLOGICAL SOCIETY. 2003.EVALUATION OF ROOTSTOCKS AND FUMIGANTS FOR CONTROL OF ALMOND REPLANT DISEASE-(Proceedings) Browne, G.T., Connell, J., Becherer, H.E., Mclaughlin, S., Schneider, S., Lee, R., Hosoda, E. 2003. Evaluation of rootstocks and fumigants for control of almond replant disease. Proceedings of Methyl Bromide Alternatives Conference.VINEYARD REPLANT DISORDER - RESULTS AFTER 1, 2, AND 4 GROWING SEASON.-(Proceedings) SCHNEIDER, S.M., TROUT, T.J., BROWNE, G.T., AJWA, H.A., SIMS, J. VINEYARD REPLANT DISORDER - RESULTS AFTER 1, 2, AND 4 GROWING SEASON.. PROCEEDINGS OF INTERNATIONAL RESEARCH CONFERENCE ON METHYL BROMIDE ALTERNAT. 2002.STRAWBERRY PRODUCTION WITH ALTERNATIVE FUMIGANTS APPLIED THROUGH DRIP IRRIGATION SYSTEMS.-(Proceedings) AJWA, H.A., TROUT, T.J., FENNIMORE, S., WINTERBOTTOM, C., MARTIN, F.N., DUNIWAY, J., BROWNE, G.T., WESTERDAHL, B., GOODHUE, R., GUERRERO, L.  2002.  STRAWBERRY PRODUCTION WITH ALTERNATIVE FUMIGANTS APPLIED THROUGH DRIP IRRIGATION SYSTEMS.. PROCEEDINGS OF INTERNATIONAL RESEARCH CONFERENCE ON METHYL BROMIDE ALTERNAT.   2002 Annual International Research Conference on Methyl Bromide Alternatives and Emissions Reductions, November 6-8, 2002, pp 14-1.ON-GOING PERFORMANCE OF VINEYARD REPLANT TRIALS INITIATED IN 1998-2000.-(Proceedings) SCHNEIDER, S.M., AJWA, H.A., TROUT, T.J., BROWNE, G.T., SIMS, J. ON-GOING PERFORMANCE OF VINEYARD REPLANT TRIALS INITIATED IN 1998-2000.. PROCEEDINGS OF METHYL BROMIDE ALTERNATIVES CONFERENCE. 2002.ALTERNATIVE FUMIGANTS FOR CONTROL OF SOIL PESTS: STRAWBERRY AS A MODEL SYSTEM-(Proceedings)LETHAL CANKERS CAUSED BY PHYTOPHTHORA SPP. IN ALMOND SCIONS: SPECIFIC ETIOLOGY AND POTENTIAL INOCULUM SOURCES-(Peer Reviewed Journal)  ProjectsImproved Pest and Disease Control for Enhanced Woody Perennial Tree Crop and Grapevine ProductionIn-House Appropriated (D)Accession Number:441857Putting phenotypic and genotyplc tools to work for improving walnut rootstocks (2023-2024)Reimbursable Cooperative Agreement (R)Accession Number:444616Integrated Conventional and Genomic Approaches to Almond Rootstock
DevelopmentTrust Fund Cooperative Agreement (T)Accession Number:438992 **Research Program:** Dr. Browne's research program examines the biology and integrated management of soilborne diseases that affect deciduous tree crops and strawberries. The research is designed to contribute to development of chemical, cultural, and biological alternatives to methyl bromide. A major focus of the lab is determining causes and practical control measures for Prunus replant disease (PRD), that causes stunting and replant failure in almond, peach, and other species of Prunus in absence of plant parasitic nematodes. Evidence to date suggests that PRD has biological cause(s), that it  exhibits specificity between peach and grape, and that it can be managed using short-term cover crop rotations as well as several alternative pre-plant fumigants. Additional projects include evaluation of almond and walnut rootsocks and strawberry cultivars for resistance to Phytophthora spp., evaluation of phosphonate treatments for prevention of perennial cankers and crown rot caused by Phytophthora spp. on almond and walnut, and detection and genetic characterization of populations of  Phytophthora spp. that affect these crops. **Biography:** Dr. Browne completed a B.S. in Plant Science at UC Davis, with a specialization in pomology. After two years of work in an operation producing stone fruits and citrus, Dr. Browne returned to UC Davis and completed M.S. and Ph.D. degrees in Plant Pathology under the direction of S.M. Mircetich. His thesis projects were concerned with Phytophthora root and crown rots of apple. He served for 3 years as the Farm Advisor for Vegetable Crops and Plant Pathology, UC Cooperative Extension, Kern County. In 1995 Dr. Browne joined USDA-ARS in Davis, CA.


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