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Mengjun Hu

Assistant Professor

Assistant Professor

Plant Science & Landscape Architecture 2102 Plant Sciences Building 4291 Fieldhouse Drive College Park, Maryland 20742


  • Plant Pathology
  • Grape and Small Fruit Disease
  • Fungicide Resistance and Its Mechanisms



Our work primarily focuses on fungal pathogens attacking grape and small fruit, with the goal of minimizing fungicide input for a sustainable crop production. 


Postdoctoral fellow (09/2013 – 01/2018), Clemson University, Clemson, SC 

Ph.D. Plant pathology; Huazhong Agricultural University (2013)

B.S. Plant protection; China Agricultural University (2008)

Awards and Honors: 

  • Outstanding dissertation. The award for the outstanding dissertation recognizes doctoral students for excellence in the dissertation, 2014, Huazhong Agricultural University

  • National scholarship for Ph.D student, 2012, Ministry of Education of China

  • First class of triple A Ph.D student, 2012, Huazhong Agricultural University

  • Annual award for best student research paper, 2nd place, 2011, College of Plant Sciences & Technology, Huazhong Agricultural University

  • The ‘Bio-Rad Star’ first class scholarship, 2011, Bio-Rad (Shanghai)

  • Triple A-master student, 2010, Huazhong Agricultural University

Professional Work

Professional Positions Held: 

Assistant Professor (02/2018 – present), Department of Plant Science and Landscape Architecture University of Maryland, College Park, MD

Professional Licenses: 

Maryland Pesticide Applicator License (No. 8939-90660)

Professional Service: 

2014 – present: American Phytopathological Society Pathogen Resistance Committee (member)

2014 – present: American Phytopathological Society Chemical Control Committee (member)



    Areas of Interest: 

    • Fungicide resistance and its molecular basis

    • Disease epidemiology

    Current Research: 

    • Development and evaluation of disease forcasting tools for grape and strawberry productions. 

    • Genotypic and phenotypic characterization of fungal species affecting small fruit.

    • Investigation of molecular basis of fungicide resistance in fruit rot pathogens. 


    Achievements in Extension: 

    • Implementation of Strawberry Advisory System (SAS) in the mid-Atlantic region

    • Development of the MyIPM smartphone application

    • Profiling fungicide resistance in gray mold pathogen affecting small fruits 


    Selected Publications: 

    • Meng-Jun Hu (2019) Improving fungicide use in integrated fruit disease management: integrated management of insect pests and diseases of tree fruit, X. Xu and M. Fountain (eds.), chapter 12. United Kingdom 
    • Mengjun Hu, S.D. Cosseboom, and G. Schnabel. (2019) AtrB-Associated Fludioxonil Resistance in Botrytis fragariae Not Linked to Mutations in Transcription Factor Mrr1. Phytopathology 109:839-846
    • Dowling, M. E., M.-J Hu, and G. Schnabel. (2018) Fungicide Resistance in Botrytis fragariaeand Species Prevalence in the Mid-Atlantic United States. Plant Dis. 102:964-969
    • Meng-Jun Hu, M.E. Dowling, and G. Schnabel. (2018) Genotypic and phenotypic variations in Botrytis spp. isolates from single strawberry flowers. Plant Dis. 120:179-184
    • Meng-Jun Hu, C.Y. Peng, J. C. Melgar and G. Schnabel. (2017)Investigation of potential causes of peach skin streaking. Plant Dis. 101:1601-1605
    • Dowling, M. E., M.-J Hu, and G. Schnabel. (2017) Identification and characterization of Botrytis fragariae isolates on strawberry in the United States. Plant Dis. 101:1769-1773
    • Meng-Jun Hu, Kerik D. Cox, and Guido Schnabel. (2016) Increasing resistances to chemical classes of fungicides via selection by association in Botrytis cinerea. Phytopathology 106:1513-1520 
    • S. N. Chen, C. X. Luo, M. J. Hu, and G. Schnabel. (2016) Sensitivity of Colletotrichumspecies, including C. fioriniae and C. nymphaeae, from peach to demethylation inhibitor fungicides. Plant Dis. 100:2434-2441
    • Dowling, M. E., Hu, M.-J., Schmitz, L. T., Wilson, J. R., and Schnabel, G. (2016) Characterization of Botrytis cinerea isolates from strawberry with reduced sensitivity to polyoxin D zinc salt. Plant Dis. 100:2057-2061.
    • S. N. Chen, C. X. Luo, M. J. Hu, and G. Schnabel. (2016) Fitness and competitive ability of Botrytis cinerea isolates with resistance to multiple chemical classes of fungicides. Phytopathology. 106:997-1005.
    • Ishii H., Fan Z., Hu M.J., Li X., Schnabel G. (2016) Efficacy of SDHI fungicides including benzovindiflupyr against Colletotrichum species. Pest Management Science DOI: 10.1002/ps.4216.
    • Meng-Jun Hu, Dolores Fernández-Ortuño, and Guido Schnabel. (2016) Monitoring Resistance to SDHI Fungicides in Botrytis cinerea from Strawberry Fields. Plant Dis. 100:959-965
    • Meng-Jun Hu, Anja Grabke, and Guido Schnabel. (2015) Investigation of the Colletotrichum gloeosporioides species complex causing peach anthracnose in South Carolina. PlantDis. 99:797-805
    • Meng-Jun Hu, Anja Grabke, Madeline E. Dowling, Helen J. Holstein, and Guido Schnabel. (2015) Resistance in Colletotrichum siamense from Peach and Blueberry to Thiophanate-methyl and Azoxystrobin. Plant Dis. 99:806-814
    • Meng-Jun Hu, Qiong-Yao Ma, Kai-Bin Li, et al. (2014) Exploring mechanism of resistance to isoprothiolane in Magnaporthe oryzae, the causal agent of rice blast. J. Plant Pathol. 96:249-259
    • Liang-Fen Yin, Meng-Jun Hu, Fei Wang, et al. (2012) Frequent Gain and Loss of Introns in Fungal Cytochrome b Genes. PLoS ONE 7(11): e49096. doi:10.1371/journal.pone.0049096.
    • Meng-Jun Hu, Kerik D. Cox, Guido Schnabel, Chao-Xi Luo (2011) Monilinia Species Causing Brown Rot of Peach in China. PLoS ONE 6 (9): e24990. doi: 10.1371/journal.pone.0024990.
    • Meng-Jun Hu, Chao-Xi Luo, Anja Grabke, Guido Schnabel (2011) Selection of a Suitable Medium to Determine Sensitivity of Monilinia fructicola Mycelium to SDHI Fungicides. J. Phytopathology 159:616-620.
    • Luo CX, Hu MJ, Jin X, Yin LF, Bryson PK, et al. (2010) An intron in the cytochrome b gene of Monilinia fructicola mitiates the risk of resistance development to QoI fungicides. Pest Manag. Sci. 66:1308-1315.