The Koch Lab

    University of Wisconsin-Madison

    UNIVERSITY of WISCONSIN-MADISON UW-MADISON

    Peer-reviewed Publications

    1. Gonzalez Vazquez, A.E., Chou, M.Y., Hockemeyer, K.R., Vang, M., Koch, P.L. 2025. Seasonal Environmental Variation Impacts 2,4-D Fate and Metabolism in Urban Landscapes. Environmental Toxicology and Chemistry. 2025, 1-15. https://doi.org/10.1093/etojnl/vgaf205
    2. Yue, C., Parasuram, U., Watkins, E., Soldat, D., Koch, P.L., Frank, K., DaCosta, M. 2025. The Economic Cost of Golf Course Turfgrass Winter Injuries in North America. HortScience 608(8): 1389-1397. 21273/HORTSCI18673-25
    3. Stanton, A., Keeley, S., Boyer, C., Domenghini, J.C., Patton, A.J., Chavarria, M.R., Tyler, Q., Hutchens, W.J., Frank, K., Xiang, M., Folck, A., Soldat, D., Koch, P.L., Thoms, A., Koski, T., Barnes, M.R., Trappe, J., Braun, R.C. 2025. Horticulture industry awareness and use of lawn and landscape cooperative extension education resources. Natural Sciences Education, e70028. https://doi.org/10.1002/nse2.70028
    4. Koch, P.L., Hockemeyer, K. 2025. Additional uses of the Smith-Kerns dollar spot model for improved dollar spot suppression. Agronomy Journal. https://doi.org/10.1002/agj2.70040
    5. Proaño-Cuenca, F., Millican, M.D., Buczkowski, E., Chou, M-Y., Koch, P.L. 2025. Fungal and bacterial community composition and assemblage in managed and unmanaged urban landscapes in Wisconsin. Science of the Total Environment 969. https://doi.org/10.1016/j.scitotenv.2025.178873
    6. Hockemeyer, K., Koch, P.L. 2025. Water carrier volume minimally affects fungicide efficacy against pink snow mold of turfgrass. International Turfgrass Research Journal. 1-7. https://doi.org/10.1002/its2.196
    7. Cashbaugh, M.K., Koch, P.L., Miller, G.L. 2025. Evaluating the capabilities of artificial intelligence for interpretation and retrieval of research data stored in a repository. International Turfgrass Research Journal. https://doi.org/10.1002/its2.70046
    8. Chou, M.Y., Patil, A.T., Huo, D., Lei, Q., Kao-Kniffin, J., Koch, P.L. 2025. Fungicide use intensity influences the soil microbiome and links to fungal disease suppressiveness in amenity turfgrass. Applied and Environmental Microbiology 91(3): https://doi.org/10.1128/aem.01771-24
    9. Shahoveisi, F., Shah, K.K., Koch, P.L. Kaminski, J.E., McCall, D., Nangle, E. 2025. Efficacy of integrated cultural practices for dollar spot disease management in turfgrass. International Turfgrass Research Journal. 2015; 1-10. https://doi.org/10.1002/its2.188
    10. Huo, D., Westrick, N.M., Nelson, A., Kabbage, M., Koch, P.L. 2024. The role of oxalic acid in Clarireedia jacksonii virulence and development on creeping bentgrass. Phytopathology 114: 2394-2400. https://doi.org/10.1094/PHYTO-03-24-0094-R
    11. Soldat, D.J., Hockemeyer, K., McCall, D.S., Straw, C.M., Koch, P.L. 2024. Optimizing liquid-applied iron sulfate rate and application interval for dollar spot suppression on golf course fairways. Crop Science. https://doi.org/10.1002/csc2.21407
    12. Groben, G., Schaefer, B., Clarke, B.B., Murphy, J., Purdon, P., Koch, P.L., Zhang, N. 2024. Horizontal and vertical distribution of Clarireedia spp., in asymptomatic and symptomatic creeping bentgrass cultivars. Plant Disease 108: 3352-3360. https://doi.org/10.1094/PDIS-08-23-1570-RE
    13. Chou, M-Y., Pavlou, D., Rice, P.J., Spokas, K.A., Soldat, D.J., Koch, P.L. 2024. Microbial diversity and soil health parameters associated with turfgrass landscapes. Applied Soil Ecology 196: 105311 https://doi.org/10.1016/j.apsoil.2024.105311
    14. Hockemeyer, K., Gonzalez Vazquez, A., Koch, P.L. 2024. Persistence of fungicides applied to control snow mold of turfgrass as influenced by snow cover and antitranspirants. Plant Disease 108: 2034-2045. https://doi.org/10.1094/PDIS-05-23-0948-RE
    15. Bushman, B., Robbins, M., Qiu, Y., Watkins, E., Hollman, A., Mihelick, N., Petrella, D., Breullin-Sessoms, F., Chou, M-Y., Koch, P. 2023. Association of hard fescue (Festuca trachyphylla) stress tolerances with genome mapped markers. Crop Science 64: 1002-1014. https://doi.org/10.1002/csc2.21155
    16. Koch, P.L., Chou, M.Y., Murphy, J., Genova, K., Hempfling, J., Clarke, B.B. 2023. Fine fescue species vary in their susceptibility to snow molds. Plant Health Progress. https://doi.org/10.1094/PHP-06-23-0056-RS
    17. Bekken, M. Soldat, D.J., Koch, P.L., Schimenti, C.S., Rossi, F.S., Aamlid, T.S., Hesselsoe, K.L., Petersen, T.K., Straw, C.M., Unruh, J.B., Kowalewski, A.R., Spring, C. 2023. Analyzing golf course pesticide risk across the US and Europe – the importance of regulatory environment. Science of the Total Environment 874: http://dx.doi.org/10.1016/j.scitotenv.2023.162498.
    18. White, A.M. Gonzalez Vazquez, A., McDaniel, E.A., Peterson, B.D., Koch, P.L., Remucal, C.K., McMahon, K.D. 2022. Expanded diversity of tfdA harboring bacteria across the natural and built environment. bioRxiv. doi: https://doi.org/10.1101/2022.09.28.509959
    19. Chou, M-Y., Clarke, B.B., Murphy, J.A., Zhang, N., Luo, J., Vines, P., Koch, P.L. 2022. Rapid detection of the recently identified turfgrass pathogen Magnaportheopsis meyeri-festucae using recombinase polymerase amplication. Plant Disease 106: 2441 – 2446. https://doi.org/10.1094/PDIS-08-21-1732-RE
    20. Bekken, M.A.H., Hockemeyer, K.R., Soldat, D.J., Koch, P.L. 2022. Reducing pesticide risk associated dollar spot management on golf course turfgrass. Front. Agron. 4:881591. https://doi.org/10.3389/fagro.2022.881591
    21. Gonzalez Vazquez, A.E., Hockemeyer, K.R., McConville, M., Remucal, C.K., Koch, P.L. 2022. Assessment of temperature and time following application as predictors of propiconazole translocation in Agrostis stolonifera. ACS Agric. Sci, Technol. 2022 2: 592 – 602. https://doi.org/10.1021/acsagscitech.2c00022
    22. Koch, P.L., Hockemeyer, K. 2021. Iron sulfate and phosphite products fail to suppress snow mold on amenity turfgrass in Wisconsin. Crop, Forage, and Turfgrass Management 7: e20138. https://doi.org/10.1002/cft2.20138
    23. Chou, M.-Y., Shrestha, S., Rioux, R.A., Koch, P.L. 2021. Hyperlocal variation in soil iron and the rhizosphere bacterial community determines dollar spot development in amenity turfgrass. Applied and Environmental Microbiology 87: e00149-21. https://doi.org/10.1128/AEM.00149-21
    24. Townsend, R.V., Millican, M.D., Smith, D., Nangle, E., Hockemeyer, K., Soldat, D., Koch, P.L. 2021. Dollar spot suppression on creeping bentgrass in response to repeated foliar nitrogen applications. Plant Disease 105: 276-284. org/10.1094/PDIS-05-20-1031-RE
    25. Hockemeyer, K., Koch, P.L. 2021. Field evaluations and in vitro sensitivity of Microdochium nivale to succinate dehydrogenase (SDHI) fungicides. International Turfgrass Research Journal 14: 951-957. https://doi.org/10.1002/its2.48
    26. Rioux, R.A., Stephens, C.M., Koch, P.L., Kabbage, M., Kerns, J.P. 2020. Identification of a tractable model system and oxalic acid-dependent symptom development of the dollar spot pathogen Clarireedia jacksonii. Plant Pathology 70: 722-734. https://doi.org/10.1111/ppa.13319
    27. Koch, P.L., Hockemeyer, K., Buczkowski, E. 2020. Evaluating biological and oil-based fungicides for dollar spot suppression on turfgrass. Agronomy Journal 105: 3808-3818, https://doi.org/10.1002/agj2.20407
    28. Groben, G. Clarke, B.B., Murphy, J. Koch, P.L., Crouch, J., Lee, S., Zhang, N. 2020. Real-time PCR detection of Clarireedia, spp., the causal agents of dollar spot in turfgrasses. Plant Disease 104: 3118-3123. https://doi.org/10.1094/PDIS-04-20-0726-RE
    29. Braun, R.C., Patton, A.J., Watkins, E., Koch, PL., Anderson, N.P., Bonos, S.A., Brilman, L.A. 2020. Fine fescues: a review of the species, their improvement, production, establishment, and management. Crop Science 60: 1142-1187. https://doi.org/10.1002/csc2.20122
    30. Townsend, R.V., Rioux, R.A., Kabbage, M., Stephens, C., Kerns, J.P., Koch, P.L. 2020. Oxalic acid production in Clarireedia jacksonii is dictated by pH, host tissue, and xylan. Frontiers in Microbiology 11: 1732. https://doi.org/10.3389/fmicb.2020.01732
    31. Kabbage M., Piotrowski, J.S., Thill, E., Westrick, N.M., Ralph, J., Hockemeyer, K., Koch, P.L. 2020. Poacic acid suppresses dollar spot and snow mould in amenity turfgrass. Plant Pathology 69: 112-119. https://doi.org/10.1111/ppa.13099
    32. Hockemeyer, K., Koch, P.L. 2019. Alternative and low-use-rate herbicides offer similar levels of weed control to current standards in turfgrass lawns in the upper Midwest. Crop, Forage, and Turfgrass Management 5: 1-6. https://doi.org/10.2134/cftm2019.05.0042
    33. Kaminski, J.E., Russell, T., Koch, P.L. 2019. First report of Ophiosphaerella agrostidis infecting creeping bentgrass in Wisconsin. Plant Disease 103:2129. https://doi.org/10.1094/PDIS-02-19-0415-PDN
    34. Bier, P.V., Persche, M., Koch, P., Soldat, D.J. 2018. A long-term evaluation of differential potassium fertilization of a creeping bentgrass putting green. Plant Soil 431: 303-316. https://doi.org/10.1007/s11104-018-3765-8
    35. Koch, P.L., Hugie, K., Watkins, E. 2018. Resistance of prairie junegrass and tufted harigrass germplasm to diseases common in temperate low-input turfgrass systems. Plant Health Progress 19: 310-318. org/10.1094/PHP-05-18-0022-RS
    36. Smith, D.L. and Kerns, J.P., Walker, N.R., Payne, A.F., Horvath, B., Inguagiato, J., Kaminski, J., Tomaso-Peterson, M., Koch, P.L. 2018. Development and validation of a weather-based warning system to advise fungicide application to control dollar spot on turfgrass. PLOS One. https://doi.org/10.1371/journal.pone.0194216
    37. Karakkat, B., Hockemeyer, K., Koch, P.L. 2018. Detection of root-infecting fungi on cool-season turfgrasses using loop-mediated isothermal amplification and recombinase polymerase amplification. J Microbiol Methods 151: 90-98. doi: 10.1016/j.mimet.2018.06.01
    38. Karakkat, B., Jackson, V., Koch, P.L. 2018. Incidence and distribution of Puccinia coronata and P. graminis on turfgrass in the Midwestern United States. Plant Disease 102(5): 955-963. org/10.1094/PDIS-09-17-1353-RE
    39. Koch, P.L., Soldat, D.J., Horgan, B.P., Bauer, S.J., Patton, A.J. 2017. The Great Lakes School of Turfgrass Science: A Nine-State Collaboration to Improve the Turfgrass Short Course. Journal of Extension 55(3): https://www.joe.org/joe/2017june/iw4.php
    40. Reedich, L.M., Millican, M.D., Koch, P.L. 2017. Temperature impacts on soil microbial communities and potential implications for the biodegradation of turfgrass pesticides. Journal of Environmental Quality 46(3): 490-497. doi: 10.2134/jeq2017.02.0067.
    41. Koch, P.L.   Optimal fungicide timing for suppression of Typhula blight under winter covers.  Agronomy Journal 108: 1-6. Doi: 10.2134/agronj2016.04.0241
    42. Koch, P.L., Stier, J. C., Kerns, J.P.   Snow cover has variable effects on persistence of fungicides and their suppression of microdochium patch on amenity turfgrass.  2015.  Plant Pathology.  doi: 10.1111/ppa.12379
    43. Koch, P.L., Kerns, J.P.   Temperature influences persistence of chlorothalonil and iprodione on creeping bentgrass foliage.  Plant Health Progress.  doi: 10.1094/PHP-RS-15-00012.  Selected as an Editor’s Pick.
    44. Koch, P.L., Stier, J. C., Senseman, S. A., Sobek, S., Kerns, J.P.   Modification of commercially-available ELISA assays to determine chlorothalonil and iprodione concentrations on golf course turfgrass.  Crop Protection 54(12): 35-42.
    45. Koch, P.L., Kerns, J.P.   Impact of novel fungicide timings on the development of snow mold and dollar spot on golf course turfgrass.  International Turfgrass Research Society Journal 12: 97-101.
    46. Koch, P.L., Kerns, J.P.   Relative resistance of creeping bentgrass cultivars to Sclerotinia homoeocarpa and Typhula incarnata.  Online.  Applied Turfgrass Science doi: 10.1094/ATS-2012-1022-01-RS. 
    47. Koch, P. L., Kerns, J. P., Stier, J. C.   Spring time fungicide applications delay and reduce dollar spot disease of turfgrass in Wisconsin.  International Turfgrass Society Research Journal 11(I): 241-252.
    48. Koch, P. L., Grau, C. G., Jo, Y. K., Jung, G.   Thiophanate-methyl and propiconazole sensitivity in Sclerotinia homoeocarpa populations from golf courses in Wisconsin and Massachusetts.  Plant Disease 93(1): 100-105.
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