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Mengjun Hu

Assistant Professor

Assistant Professor

Plant Science & Landscape Architecture 2106 Plant Sciences Building 4291 Fieldhouse Drive College Park, Maryland 20742


  • Plant Pathology
  • Small Fruit Disease Management
  • Fungicide Resistance and its Mechanism



I am a plant pathologist with responsibility of managing grape and small fruit diseases through working with producers in Maryland. My research has been primarily focused on fungicide resistance and epidemiology, with emphasis on Botrytis spp., Colletotrichum spp. and other common fungal pathogens attacking grape and small fruits.  


Postdoctoral Research Associate (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 Doctoral Dissertation Award, 2014, Huazhong Agricultural University

  • National Scholarship for PhD student, 2012, Ministry of Education of China

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.