James P Kerns

First Report of Gray Leaf Spot Caused by Pyricularia oryzae on Zoysia japonica in the United States of America

Freund, D., Fraser, M., Stephens, C., Dean, D., Butler, L., & Kerns, J. P. (2025, August 13). Plant Disease, Vol. 109.

Identification of Quantitative Trait Loci Controlling Large Patch (Rhizoctonia solani Anastomosis Group 2-2LP) Resistance in Zoysiagrass

Phytopathology®, 115(7), 841–849.

Review of the biology and management of large patch of warm‐season turfgrasses

Kreinberg, S. T., Kerns, J. P., Miller, G. L., Richardson, M. D., Spurlock, T. N., & Hutchens, W. J. (2025, March 1). Crop Science, Vol. 65.

Phytophthora nicotianae: A Quick Diagnostic Guide for Black Shank of Tobacco

Cochran, S., Quesada-Ocampo, L. M., Kerns, J. P., & Thiessen, L. D. (2024, January 1). Plant Health Progress, Vol. 5.

Blend ratios and mixtures of brown patch susceptible and resistant tall fescue cultivars

Powlen, J. S., McCall, D. S., Hensler, K. L., Kerns, J. P., Fidanza, M. A., & Bigelow, C. A. (2024, October 12). Agronomy Journal, Vol. 10.

Brown patch severity as affected by cool‐season turfgrass species, cultivar, and nitrogen rate

Powlen, J. S., Kerns, J. P., Fidanza, M. A., & Bigelow, C. A. (2024, May 11). Crop Science, Vol. 5.

Brown patch severity of five tall fescue cultivars as influenced by summer nitrogen rates

Powlen, J. S., Kerns, J. P., Fidanza, M. A., & Bigelow, C. A. (2024, June 5). Crop Protection, Vol. 184.

Effect of mowing timing and clipping collection practices on azoxystrobin distribution, persistence, and efficacy

Freund, D. R., Kerns, J. P., Butler, E. L., Ahmed, K. A., & Gannon, T. W. (2024, September 18). Crop Science, Vol. 9.

Fifteen years of findings: Advancements in spring dead spot research from 2009 to 2024

Hutchens, W. J., Anders, J. K., Butler, E. L., Kerns, J. P., McCall, D. S., Miller, G. L., & Walker, N. R. (2024, September 22). Crop Science, Vol. 9.

Turf-Type Tall Fescue Brown Patch Resistance as Influenced by Morphological Characteristics

Powlen, J. S., Fidanza, M. A., Kerns, J. P., Hoagland, L. A., & Bigelow, C. A. (2024, January 1). Plant Health Progress, Vol. 4.

Compendium of Turfgrass Diseases, Fourth Edition

In L. P. Tredway, M. Tomaso-Peterson, J. P. Kerns, & B. B. Clarke (Eds.), The American Phytopathological Society eBooks.

Environmental and Edaphic Factors that Influence Spring Dead Spot Epidemics

Hutchens, W. J., Henderson, C. A., Straw, C. M., Goatley, J. M., Kerns, J. P., Nita, M., … McCall, D. S. (2023, June 19). Phytopathology, Vol. 2.

Influence of fungicide selection and application timing on take‐all root rot management under field and greenhouse conditions

Stephens, C. M., Gannon, T. W., Cubeta, M. A., & Kerns, J. P. (2023, November 22). Crop Forage & Turfgrass Management, Vol. 10.

In Vitro Fungicide Sensitivity and Effect of Organic Matter Concentration on Fungicide Bioavailability in Take-All Root Rot Pathogens Isolated from North Carolina

Stephens, C. M., Gannon, T. W., Thiessen, L. D., Cubeta, M. A., & Kerns, J. P. (2022, November 26). Plant Health Progress, Vol. 24, pp. 162–170.

Morphological and Molecular Characterization of Prevalent Plant-Parasitic Nematodes from Turfgrasses in Guangdong, China

Zeng, Y., Chen, X., Ni, Y., Zhao, C., Kerns, J., Tredway, L., & Roberts, J. (2022, July 6). Horticulturae, Vol. 8.

Pythium spp. Associated with Root Rot and Stunting of Winter Crops in North Carolina

Reeves, E. R., Kerns, J., Cowger, C., & Shew, B. B. (2021, May 14). Plant Disease, Vol. 105, pp. 3433–3442.

Characterization and Aggressiveness of Take-All Root Rot Pathogens Isolated from Symptomatic Bermudagrass Putting Greens

Stephens, C. M., Gannon, T. W., Cubeta, M. A., Sit, T. L., & Kerns, J. P. (2021, October 19). Phytopathology, Vol. 112, pp. 811–819.

Geographic Distribution of Ophiosphaerella Species in the Mid-Atlantic United States

Hutchens, W. J., Henderson, C. A., Bush, E. A., Kerns, J. P., & McCall, D. S. (2021, July 31). Plant Health Progress, Vol. 23, pp. 93–100.

Influence of post‐application irrigation and mowing timing on fungicide fate on a United States Golf Association golf course putting green

Stephens, C. M., Kerns, J. P., Ahmed, K. A., & Gannon, T. W. (2021, May 17). Journal of Environmental Quality, Vol. 6.

Pythium spp. Associated with Root Rot and Stunting of Winter Wheat in North Carolina

Reeves, E. R., Kerns, J. P., Cowger, C., & Shew, B. B. (2020, November 19). Plant Disease, Vol. 105, pp. 986–996.

Assessment of fungicide product applications and program approaches for control of downy mildew on pickling cucumber in North Carolina

D'Arcangelo, K. N., Adams, M. L., Kerns, J. P., & Quesada-Ocampo, L. M. (2020, October 4). Crop Protection, Vol. 140, p. 105412.

Evaluating Fungicide Selections to Manage Pythium Root Rot on Poinsettia Cultivars with Varying Levels of Partial Resistance

Lookabaugh, E. C., Kerns, J. P., & Shew, B. B. (2020, December 15). Plant Disease, Vol. 105, pp. 1640–1647.

Genome Resources for Seven Fungal Isolates That Cause Dollar Spot Disease in Turfgrass, Including Clarireedia jacksonii and C. monteithiana

Crouch, J. A., Beirn, L. A., Boehm, M. J., Carbone, I., Clarke, B. B., Kerns, J. P., … Tredway, L. P. (2020, July 21). Plant Disease, Vol. 105, pp. 691–694.

Identification of a tractable model system and oxalic acid‐dependent symptom development of the dollar spot pathogen Clarireedia jacksonii

Rioux, R. A., Stephens, C. M., Koch, P. L., Kabbage, M., & Kerns, J. P. (2020, November 21). Plant Pathology, Vol. 70, pp. 722–734.

Impact of nitrogen source, fall fertilizers, and preventive fungicides on spring dead spot caused by Ophiosphaerella korrae and O. herpotricha

Tredway, L. P., Soika, M. D., Butler, E. L., & Kerns, J. P. (2020, August 27). Crop Science, Vol. 61, pp. 3187–3196.

Oxalic Acid Production in Clarireedia jacksonii Is Dictated by pH, Host Tissue, and Xylan

Townsend, R. V., Rioux, R. A., Kabbage, M., Stephens, C., Kerns, J. P., & Koch, P. (2020, August 4). Frontiers in Microbiology, Vol. 11.

Ralstonia solanacearum Species Complex: A Quick Diagnostic Guide

García, R. O., Kerns, J. P., & Thiessen, L. (2019, January 1). Plant Health Progress, Vol. 20, pp. 7–13.

Effect of post-application irrigation on fungicide movement and efficacy against Magnaporthiopsis poae

Hutchens, W. J., Gannon, T. W., Shew, H. D., & Kerns, J. P. (2019, April 27). Crop Protection, Vol. 122, pp. 106–111.

Influence of Nitrogen Rate and Timing, Fungicide Application Method, and Simulated Rainfall after Fungicide Application on Brown Patch Severity in Tall Fescue

Butler, E. L., Galle, G. H., & Kerns, J. P. (2019, January 1). Crop Forage & Turfgrass Management, Vol. 5.

Development and validation of a weather-based warning system to advise fungicide applications to control dollar spot on turfgrass

Smith, D. L., Kerns, J. P., Walker, N. R., Payne, A. F., Horvath, B., Inguagiato, J. C., … Koch, P. L. (2018, March 9). PLoS ONE, Vol. 13.

Fitness Attributes of Pythium aphanidermatum with Dual Resistance to Mefenoxam and Fenamidone

Plant Disease, 102(10), 1938–1943.

Brachypodium: A Potential Model Host for Fungal Pathogens of Turfgrasses

Rioux, R. A., Ryzin, B. J. V., & Kerns, J. P. (2017, January 30). Phytopathology, Vol. 107, pp. 749–757.

Morphological and molecular characterization of Xiphinema species from Shenzhen, China

Zeng, Y., Ye, W., Zhang, Z., Sun, H., Yong, L., Huang, Y., … Kerns, J. (2016, March 1). Helminthologia, Vol. 53, pp. 62–75.

Population dynamics of Belonolaimus longicaudatus in Central North Carolina

Journal of Nematology, 48(4), 322–323.

Bacterial etiolation of creeping bentgrass as influenced by biostimulants and trinexapac-ethyl

Roberts, J. A., Kerns, J. P., & Ritchie, D. F. (2015, March 18). Crop Protection, Vol. 72, pp. 119–126.

Molecular Characterisation and Diagnosis of Root-Knot Nematodes (Meloidogyne spp.) from Turfgrasses in North Carolina, USA

Ye, W., Zeng, Y., & Kerns, J. (2015, November 24). PLoS ONE, Vol. 10.

Molecular Characterization and Phylogenetic Relationships of Plant-Parasitic Nematodes Associated with Turfgrasses in North Carolina and South Carolina, United States

Zeng, Y., Ye, W., Kerns, J., Tredway, L., Martin, S., & Martin, M. (2015, February 24). Plant Disease, Vol. 99, pp. 982–993.

Plant Growth Regulator Effects on Bacterial Etiolation of Creeping Bentgrass Putting Green Turf Caused by Acidovorax avenae

Roberts, J. A., Ritchie, D. F., & Kerns, J. P. (2015, October 15). Plant Disease, Vol. 100, pp. 577–582.

Snow cover has variable effects on persistence of fungicides and their suppression of microdochium patch on amenity turfgrass

Koch, P. L., Stier, J. C., & Kerns, J. P. (2015, April 8). Plant Pathology, Vol. 64, pp. 1417–1428.

Development of a semi-selective medium for improved isolation of the turfgrass dollar spot pathogenSclerotinia homoeocarpafrom host tissues

Rioux, R. A., Ryzin, B. J. V., & Kerns, J. P. (2014, April 3). Canadian Journal of Plant Pathology, Vol. 36, pp. 235–245.

First Report of Trichodorus obtusus on Turfgrass in North Carolina, U.S.A.

Ye, W., Zeng, Y., & Kerns, J. (2014, October 22). Plant Disease, Vol. 99, pp. 291–291.

First report and morphological and molecular characterization of Meloidogyne incognita from Radermachera sinica in China

Nematropica, 44(2), 118–129.

Morphological and molecular characterization of two isolates of Paratrichodorus porosus from Shenzhen, China

Zeng, Y., Ye, W., Yang, L., Huang, Y., Zhao, K., Zhang, Z., … Kerns, J. (2014, November 3). Helminthologia, Vol. 51, pp. 323–330.

Sclerotinia homoeocarpa Overwinters in Turfgrass and Is Present in Commercial Seed

Rioux, R. A., Shultz, J., Garcia, M., Willis, D. K., Casler, M., Bonos, S., … Kerns, J. (2014, October 21). PLoS ONE, Vol. 9.

Modification of a commercially-available ELISA kit to determine chlorothalonil and iprodione concentration on golf course turfgrass

Koch, P. L., Stier, J. C., Senseman, S. A., Sobek, S., & Kerns, J. P. (2013, August 22). Crop Protection, Vol. 54, pp. 35–42.

Preventive Control of Pythium Root Dysfunction in Creeping Bentgrass Putting Greens and Sensitivity of Pythium volutum to Fungicides

Kerns, J. P., Soika, M. D., & Tredway, L. P. (2009, November 5). Plant Disease, Vol. 93, pp. 1275–1280.

Influence of Temperature on Pathogenicity of Pythium volutum Toward Creeping Bentgrass

Kerns, J. P., & Tredway, L. P. (2008, November 13). Plant Disease, Vol. 92, pp. 1669–1673.

Pathogenicity of Pythium Species Associated with Pythium Root Dysfunction of Creeping Bentgrass and Their Impact on Root Growth and Survival

Kerns, J. P., & Tredway, L. P. (2008, May 16). Plant Disease, Vol. 92, pp. 862–869.

First Report of Pythium Root Dysfunction of Creeping Bentgrass Caused by Pythium volutum in North Carolina

Kerns, J. P., & Tredway, L. P. (2007, May 1). Plant Disease, Vol. 91, pp. 632–632.