Emma Wallace

Emma Wallace

  • Ph.D. Candidate in Plant Pathology and International Agriculture and Development
  • Co-Advised by: Dr. David Geiser and Dr. María del Mar Jiménez Gasco
120 Buckhout Lab (Office)
118/119 Buckhout Lab (Lab)

University Park, PA 16802

Areas of Expertise

  • Population genetics
  • Fungal/Oomycete morphology and systematics


  • B.S., Biology, Marymount University
  • M.S., Plant Pathology, North Carolina State University


Wallace, E., D'Archangelo, K., Quesada-Ocampo, L.M. 2020. Population analyses reveal two host-adapted clades of Psuedoperonospora cubensis, the causal agent of cucurbit downy mildew, on commercial and wild cucurbits. Phytopathology, 110(9): 1578-1587.

Salgado-Salazar, C., LeBlanc, N., Wallace, E., Daughtrey, M.L., Crouch, J.A. 2020. Peronospora bergamotiHyaloperonospora daughtreyae and H. iberidis: New species associated with downy mildew diseases affecting ornamental plants in the United States. European Journal of Plant Pathology, 157: 311-326.

Wallace, E., Salgado-Salazar, C., Gregory, N.F., Crouch, J.A. 2018. Basidiophora delawarensis, a new downy mildew species infecting cultivated goldenrod (Solidago sphacelata) in the USA. Mycological Progress, 17(12): 1283-1291.

Salgado-Salazar, C., Bauchan, G.R., Wallace, E.C., Crouch, J.A. 2018. Visualization of the impatiens downy mildew pathogen using fluorescence in situ hybridization (FISH). Plant Methods, 14(92) doi:10.1186/s13007-018-0362-z.

Wallace, E, Daughtrey, M.L, Rane, K.A., Salgado-Salazar, C., Crouch, J.A.. 2018. First report of Peronospora sp. causing downy mildew disease on Geum sp. in Maryland and New York. Plant Disease. 102(7): 1463.

Wallace, E. & Crouch, J.A. 2018. First report of Peronospora digitalidis causing downy mildew disease on foxglove in Oregon. Plant Disease, 102(4): 827.

Wallace, E. & Quesada-Ocampo, L.M. 2017. Analysis of microsatellites from the transcriptome of downy mildew pathogens and their application for characterization of Pseudoperonospora populations. PeerJ. 5:e3266.

Wallace, E., Choi, Y.J., Thines, M., Quesada-Ocampo, L.M. 2015. First report of Plasmopara aff. australis on Luffa cylindrica in the United States. Plant Disease. 100(2): 537.

Wallace, E., Adams, M., Quesdada-Ocampo, L.M. 2015. First report of downy mildew on Buffalo Gourd (Cucurbita foetidissima) caused by Pseudoperonospora cubensis in North Carolina. Plant Disease, 99(12): 1861.

Wallace, E., Adams, M., Ivors, K., Ojiambo, P.S., Quesada-Ocampo, L.M. 2014. First report of Pseudoperonospora cubensis causing downy mildew on Momordica balsamina and M. charantia in North Carolina. Plant Disease, 98(9): 1279.