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Joanne Crouch
Mycology and Nematology Genetic Diversity and Biology Laboratory
Research Molecular Biologist

Phone: (301) 504-6922
Fax: (301) 504-5062
Room 228

10300 BALTIMORE AVENUE
BLDG 010A BARC-WEST
BELTSVILLE , MD 20705
Projects
Enhancing Plant Protection through Fungal Systematics
In-House Appropriated (D)
  Accession Number: 432548
Serological Detection Tools for Early Detection of Boxwood Blight
Interagency Reimbursable Agreement (I)
  Accession Number: 433625
Integrated Clinical, Extension, Research and Regulatory (ICERR) Internships in Systematics and Diagnotics
Interagency Reimbursable Agreement (I)
  Accession Number: 431498
Boxwood Blight Mitigation Strategies
Interagency Reimbursable Agreement (I)
  Accession Number: 431500
Enhanced Mitigation and Detection of Impatiens, Cucurbit, Hops, and Basil Downy Mildews
Interagency Reimbursable Agreement (I)
  Accession Number: 431503

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Downy mildew disease of New England aster (Symphyotrichum novae-angliae) caused by Basidiophora simplex in New York -
Wallace, E.C., Crouch, J.A. 2018. Downy mildew disease of New England aster (Symphyotrichum novae-angliae) caused by Basidiophora simplex in New York. Plant Disease. https://doi.org/10.1094/PDIS-04-18-0555-PDN.
Genetic variation of the pathogen causing impatiens downy mildew pre-dating and including 21st century epidemics on Impatiens walleriana -
Salgado-Salazar, C., LeBlanc, N., Ismaiel, A.A., Rivera, Y., Warfield, C., Crouch, J.A. 2018. Genetic variation of the pathogen causing impatiens downy mildew pre-dating and including 21st century epidemics on Impatiens walleriana. Plant Disease. http://dx.doi.org/10.1094/PDIS-01-18-0077-RE.
Downy mildew: a serious disease threat to rose health worldwide -
Salgado-Salazar, C., Shishkoff, N., Daughtrey, M.L., Palmer, C., Crouch, J. 2018. Downy mildew: a serious disease threat to rose health worldwide. Plant Disease. doi.org/10.1094/PDIS-12-17-1968-FE.
Clarireedia: A new fungal genus comprising four pathogenic species responsible for dollar spot disease of turfgrass -
Salgado-Salazar, C., Beirn, L.A., Ismaiel, A.A., Boehm, M.J., Carbone, I., Putnam, A.I., Tredway, L.P., Clarke, B.B., Crouch, J.A. 2018. Clarireedia: A new fungal genus comprising four pathogenic species responsible for dollar spot disease of turfgrass. Fungal Biology. https://doi.org/10.1016/j.funbio.2018.04.004.
Genome wide analysis of the transition to pathogenic lifestyles in Magnaporthales fungi -
Zhang, N., Cai, G., Price, D.C., Crouch, J., Gladieux, P., Hillman, B., Khang, C.H., Lebrun, M., Lee, Y., Luo, J., Qiu, H., Veltri, D., Wisecarver, J.H., Zhu, J., Bhattacharya, D. 2018. Genome wide analysis of the transition to pathogenic lifestyles in Magnaporthales fungi. Scientific Reports. 8:5862. https://doi.org/10.1038/s41598-018-24301-6.
Data from: Clarireedia: A new fungal genus comprising four pathogenic species responsible for dollar spot disease of turfgrass -
Salgado-Salazar, C., Beirn, L.A., Clarke, B.B., Crouch, J. 2018. Data from: Clarireedia: A new fungal genus comprising four pathogenic species responsible for dollar spot disease of turfgrass. Ag Data Commons. http://dx.doi.org/10.15482/USDA.ADC/1429061.
Boxwood blight: an ongoing threat to ornamental and native boxwood -
Leblanc, N., Salgado-Salazar, C., Crouch, J.A. 2018. Boxwood blight: an ongoing threat to ornamental and native boxwood. Applied Microbiology and Biotechnology. https://doi.org/10.1007/s00253-018-8936-2.
Downy mildew of Double Knock Out® rose caused by Peronospora sparsa in Maryland -
Salgado-Salazar, C., Ismaiel, A., Crouch, J. 2018. Downy mildew of Double Knock Out® rose caused by Peronospora sparsa in Maryland. Plant Disease. https://doi.org/10.1094/PDIS-11-17-1802-PDN.
First report of Peronospora sp. causing downy mildew disease on Geum sp. in the northeastern United States -
Wallace, E., Daughtery, M., Rane, K., Salgado-Salazar, C., Crouch, J. 2018. First report of Peronospora sp. causing downy mildew disease on Geum sp. in the northeastern United States. Plant Disease. https://doi.org/10.1094/PDIS-09-17-1503-PDN.
First Report of Peronospora digitalidis causing downy mildew disease on foxglove in Oregon -
Wallace, E., Crouch, J. 2017. First Report of Peronospora digitalidis causing downy mildew disease on foxglove in Oregon. Plant Disease. 102:827. https://doi.org/10.1094/PDIS-09-17-1504-PDN.
Genome datasets for Calonectria henricotiae and C. pseudonaviculata causing boxwood blight disease and related species -
Crouch, J., Malapi-Wight, M., Rivera, Y., Salgado-Salazar, C., Veltri, D. 2017. Genome datasets for Calonectria henricotiae and C. pseudonaviculata causing boxwood blight disease and related species. Ag Data Commons. http://dx.doi.org/10.15482/USDA.ADC/1410184.
Genome analysis of the ubiquitous boxwood pathogen Pseudonectria foliicola: A small fungal genome with an increased cohort of genes associated with loss of virulence -
Rivera, Y., Salgado-Salazar, C., Veltri, D., Malapi-Wight, M., Crouch, J. 2017. Genome analysis of the ubiquitous boxwood pathogen Pseudonectria foliicola: A small fungal genome with an increased cohort of genes associated with loss of virulence. Ag Data Commons. http://dx.doi.org/10.15482/USDA.ADC/1408094.
The U.S. National Mall microbiome: A census of rhizosphere bacteria inhabiting landscape turf -
Crouch, J.A., Carter, Z., Ismaiel, A., Roberts, J.A. 2017. The U.S. National Mall microbiome: A census of rhizosphere bacteria inhabiting landscape turf. Crop Science. 57:S341-S348. https://doi.org/10.2135/cropsci2016.10.0849.
First report of dollar spot disease, caused by Sclerotinia homoeocarpa, of Agrostis stolonifera in Sweden -
Espevig, T., Brurberg, M., Usolteseva, M., Dahl, A., Normann, K., Kvalbein, A., Crouch, J. 2017. First report of dollar spot disease, caused by Sclerotinia homoeocarpa, of Agrostis stolonifera in Sweden. Crop Science. 57:S-349-S-353. https://doi:10.2135/cropsci2016.10.0835.
First report of downy mildew caused by Hyaloperonospora sp. on Iberis sempervirens in the United States -
Salgado-Salazar, C., Rane, K.K., Crouch, J. 2017. First report of downy mildew caused by Hyaloperonospora sp. on Iberis sempervirens in the United States. Plant Disease. 101(6):1058. doi: 10.1094/PDIS-08-16-1158-PDN.
Differences among soil-inhabiting microbial communities in Poa annua turf throughout the growing season -
Beirn, L.A., Hempfling, J.W., Schmid, C.J., Murphy, J.A., Clarke, B.B., Crouch, J. 2016. Differences among soil-inhabiting microbial communities in Poa annua turf throughout the growing season. Crop Science. 57(1):1-12. doi: 10.2135/cropsci2016.06.0463.
First report of Colletotrichum nigrum causing anthracnose disease on tomato fruit in New Jersey -
Rivera, Y., Stommel, J.R., Dumm, J.M., Ismaiel, A.A., Wyenandt, A.C., Crouch, J. 2016. First report of Colletotrichum nigrum causing anthracnose disease on tomato fruit in New Jersey. Plant Disease. 100(10): 2162.
LAMP detection assays for boxwood blight pathogens: a comparative genomics approach -
Wight-Malapi, M., Demers, J.E., Veltri, D.P., Marra, R.E., Crouch, J. 2016. LAMP detection assays for boxwood blight pathogens: a comparative genomics approach. Scientific Reports. doi: 10.1038/srep26140.
SimpleSynteny: a web-based tool for visualization of microsynteny across multiple species -
Veltri, D., Wight, M.M., Crouch, J. 2016. SimpleSynteny: a web-based tool for visualization of microsynteny across multiple species. Nucleic Acids Research. 44(W1):W41-W45.
Newly emerged populations of Plasmopara halstedii infecting rudbeckia exhibit unique genotypic profiles and are distinct from sunflower-infecting strains -
Rivera, Y., Salgado-Salazar, C., Gulya Jr, T.J., Crouch, J.A. 2016. Newly emerged populations of Plasmopara halstedii infecting rudbeckia exhibit unique genotypic profiles and are distinct from sunflower-infecting strains. Phytopathology. 106(7):752-761.
Sarcococca blight: Use of whole genome sequencing as a strategy for fungal disease diagnosis -
Wight-Malapi, M., Salgado-Salazar, C., Demers, J.E., Clements, D., Rane, K., Crouch, J. 2016. Sarcococca blight: Use of whole genome sequencing as a strategy for fungal disease diagnosis. Plant Disease. 100(6):1093-1100.
First report of downy mildew caused by Peronospora sp. on Agastache in the United States -
Rivera, Y., Salgado-Salazar, C., Creswell, T.C., Ruhl, G., Crouch, J. 2016. First report of downy mildew caused by Peronospora sp. on Agastache in the United States. Plant Disease. 100(6):1249.
Downy mildew on coleus (Plectranthus scutellarioides) caused by Peronospora belbahrii sensu lato in Tennessee -
Rivera, Y., Salgado-Salazar, C., Windham, A.S., Crouch, J.A. 2016. Downy mildew on coleus (Plectranthus scutellarioides) caused by Peronospora belbahrii sensu lato in Tennessee. Plant Disease. 100(3):655.
A greenhouse-based inoculation protocol for fungi causing crown rust and stem rust diseases of Kentucky bluegrass turf -
Beirn, L.A., Meyer, W.A., Clarke, B.B., Crouch, J.A. 2015. A greenhouse-based inoculation protocol for fungi causing crown rust and stem rust diseases of Kentucky bluegrass turf. HortScience. 50(10):1509-1513.
Polymorphic SSR markers for Plasmopara obducens (Peronosporaceae), the newly emergent downy mildew pathogen of Impatiens (Balsaminaceae) -
Salgado, C.S., Rivera, Y., Veltri, D.P., Crouch, J.A. 2015. Polymorphic SSR markers for Plasmopara obducens (Peronosporaceae), the newly emergent downy mildew pathogen of Impatiens (Balsaminaceae). Applications in Plant Sciences. 3(11):1500073.
Development of a greenhouse-based inoculation protocol for the fungus Colletotrichum cereale pathogenic to annual bluegrass (Poa annua) -
Beirn, L., Wang, R., Clarke, B.B., Crouch, J. 2015. Development of a greenhouse-based inoculation protocol for the fungus Colletotrichum cereale pathogenic to annual bluegrass (Poa annua). PeerJ. 3:e1153 DOI:10.7717/peerj1153
Draft genome sequences of Chrysoporthe austroafricana, Diplodia scrobiculata, Fusarium nygamai, Leptographium lundbergii, Limonomyces culmigenus, Stagonosporopsis tanaceti, and Thielaviopsis punctulata -
Wingfield, B., Ades, P., Al-Naemi, F., Beirn, L., Bihon, W., Crouch, J., De Beer, W., De Vos, L., Duong, T., Fields, C., Fourie, G., Kanzi, A., Wight-Malapi, M., Pethybridge, S., Radwan, O., Rendon, G., Slippers, B., Santana, Q., Steenkamp, E., Taylor, P., Vaghefi, N., Van Der Merwe, N., Veltri, D., Wingfield, M. 2015. Draft genome sequences of Chrysoporthe austroafricana, Diplodia scrobiculata, Fusarium nygamai, Leptographium lundbergii, Limonomyces culmigenus, Stagonosporopsis tanaceti, and Thielaviopsis punctulata. IMA Fungus. 6(1):231-246.
First report of downy mildew disease caused by Plasmopara halstedii on the native Rudbeckia fulgida Aiton var. speciosa (Wender.) -
Rivera, Y., Creswell, T.C., Crouch, J. 2015. First report of downy mildew disease caused by Plasmopara halstedii on the native Rudbeckia fulgida Aiton var. speciosa (Wender.). Plant Disease. DOI.org/10.1094/PDIS-11-14-1190-PDN.
Characterization and taxonomic re-assessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov -
Gehesquière, B., Crouch, J., Marra, R., Van Poucke, K., Rys, F., Maes, M., Gobin, B., Höfte, M., Heungens, K. 2015. Characterization and taxonomic re-assessment of the box blight pathogen Calonectria pseudonaviculata, introducing Calonectria henricotiae sp. nov. Plant Pathology. DOI.org/10.1111/ppa.12401.
Draft genome sequence of Dactylonectria macrodydima, a plant pathogenic fungus in the Nectriaceae -
Wight-Malapi, M., Salgado, C.S., Demers, J.E., Veltri, D.P., Crouch, J. 2015. Draft genome sequence of Dactylonectria macrodydima, a plant pathogenic fungus in the Nectriaceae. Genome Announcements. 3(2):e00278-15.
Insect E-probe Diagnostic Nucleic acid Analysis (EDNA): the application of a novel bioinformatic tool to detection of vectors and pathogens in individual insect and simulated insect trap metagenomes -
Schneider, W.L., Stone, A.L., Sherman, D.J., Wight-Malapi, M., Andreason, S.A., Daniels, J., Ochoa Corona, F., Crouch, J., Wayadande, A. 2015. Insect E-probe Diagnostic Nucleic acid Analysis (EDNA): the application of a novel bioinformatic tool to detection of vectors and pathogens in individual insect and simulated insect trap metagenomes. Phytopathology. 105: S4:124.
Draft genomes of Amanita jacksonii, Ceratocystis albifundus, Fusarium circinatum, Huntiella omanensis, Leptographium procerum, Rutstroemia sydowiana, and Sclerotinia echinophila -
Crouch, J., Demers, J.E., Beirn, L., Gordon, T.R., Moncalvo, J., Sanchez-Ramirez, S., Stata, M., Van Der Nest, M.A., Wilhelm De Beer, Z., De Vos, L., Naidoo, K., Roodt, D., Santana, Q.C., Slinski, S.L., Taerum, S.J., Wilken, M.P., Wilson, A.M., Wingfield, M.J., Wingfield, B.D. 2014. Draft genomes of Amanita jacksonii, Ceratocystis albifundus, Fusarium circinatum, Huntiella omanensis, Leptographium procerum, Rutstroemia sydowiana, and Sclerotinia echinophila. IMA Fungus. 5(2)473-486.
Development of polymorphic genic-SSR markers by cDNA library sequencing in boxwood, Buxus spp. (Buxaceae) -
Thammina, C., Olsen, R.T., Wight-Malapi, M., Crouch, J., Pooler, M.R. 2014. Development of polymorphic genic-SSR markers by cDNA library sequencing in boxwood, Buxus spp. (Buxaceae). Applications in Plant Sciences. 9(12):1400095.
A multiplex real-time PCR assay for the detection of Puccinia horiana and P. chrysanthemi on chrysanthemum -
Demers, J.E., Crouch, J., Castlebury, L.A. 2015. A multiplex real-time PCR assay for the detection of Puccinia horiana and P. chrysanthemi on chrysanthemum. Plant Disease. 99(2):195-200.
Influence of host and geographic locale on the distribution of Colletotrichum cereale lineages -
Beirn, L., Clark, B., Crouch, J. 2014. Influence of host and geographic locale on the distribution of Colletotrichum cereale lineages. PLoS One. 9(5):e97706. doi:10.1371/journal.pone.0097706.
First report of impatiens downy mildew outbreaks caused by Plasmopara obducens throughout the Hawai'ian islands -
Crouch, J., Ko, M., Mckemy, J.M. 2014. First report of impatiens downy mildew outbreaks caused by Plasmopara obducens throughout the Hawai'ian islands. Plant Disease. 98(5):696.
The genomics of Colletotrichum -
Crouch, J.A., O’Connell, R.J., Gan, P., Buiate, E., Torres, M.F., Beirn, L.A., Shirashu, K., Vaillancourt, L.J. 2014. The genomics of Colletotrichum. In: Park, A.L.,Dean, R., Kole, C., editors. Genomics of Plant-Associated Fungi: Monocot Pathogens. Heidelberg, Berlin:Springer. p. 69-102.
Colletotrichum caudatum s.l. is a species complex -
Crouch, J. 2014. Colletotrichum caudatum s.l. is a species complex. IMA Fungus. 5(1):17-30.
First report of downy mildew caused by Plasmopara halstedii on black-eyed susan (Rudbeckia fulgida cv. ‘Goldsturm’) in Maryland -
Rivera, Y., Rane, K., Crouch, J. 2014. First report of downy mildew caused by Plasmopara halstedii on black-eyed susan (Rudbeckia fulgida cv. ‘Goldsturm’) in Maryland . Plant Disease. 98(7):1005.
First report of boxwood blight caused by Calonectria pseudonaviculata in Delaware, Maryland, New Jersey and New York -
Malapi-Wight, M., Hebert, J.B., Buckley, R., Daughtery, M.L., Gregory, N., Rane, K., Tirpak, S., Crouch, J. 2014. First report of boxwood blight caused by Calonectria pseudonaviculata in Delaware, Maryland, New Jersey and New York. Plant Disease. 98(5):698.
Real-time PCR detection of Puccinia chrysanthemi causing brown rust of chrysanthemum -
Demers, J.E., Crouch, J., Castlebury, L.A. 2014. Real-time PCR detection of Puccinia chrysanthemi causing brown rust of chrysanthemum [abstract]. American Phytopathological Society Annual Meeting. 104(S1):S1.2.
Anthracnose of centipedegrass turf Reprint Icon -
Tomaso-Peterson, M., Crouch, J., Balbalian, C. 2012. Anthracnose of centipedegrass turf. Applied Turfgrass Science. 9(1). DOI: 10.1094/ATS-2012-1126-01-MG
Development of a molecular assay system for the rapid detection and identification of Ug99 and related races of Puccinia graminis -
Szabo, L.J., Crouch, J. 2012. Development of a molecular assay system for the rapid detection and identification of Ug99 and related races of Puccinia graminis. Meeting Abstract. p. 238.
Life-style transitions in plant pathogenic Colletotrichum fungi deciphered by genome and transcriptome analyses -
O'Connell, R.J., Thon, M.R., Hacquard, S., Van Themaat, E.V., Amyotte, S., Kleemann, J., Torres-Quintero, M., Damm, U., Buiate, E., Epstein, L., Alkan, N., Altmuller, J., Alvarado, B.L., Bauser, C., Becker, C., Birren, B.W., Chen, Z., Crouch, J., Duvick, J., Farman, M., Gan, P., Heiman, D., Henrissat, B., Howard, R.J., Kabbage, M., Koch, C., Kubo, Y., Law, A., Lebrun, M.H., Lee, Y.H., Miyara, L., Moore, N., Neumann, U., Panaccione, D.G., Panstruga, R., Place, M., Proctor, R., Prusky, D., Rech, G., Reinhardt, R., Rollins, J.A., Rounsley, S., Schardl, C., Schwartz, D.C., Shenoy, N., Shirasu, K., Stuber, K., Sukno, S.A., Sweigard, J.A., Takano, Y., Takahara, H., Vanderdoes, H.C., Voll, L., Will, I., Young, S., Zeng, Q., Zhang, J., Zhou, S., Dickman, M.B., Schulze-Lefert, P., Ma, L.J., Vaillancourt, L.J. 2012. Life-style transitions in plant pathogenic Colletotrichum fungi deciphered by genome and transcriptome analyses. Nature Genetics. 44:1060-1065.
Real-time PCR detection of the boxwood blight pathogen Calonectria pseudonaviculata -
Crouch, J., Marra, R.E., Rossman, A.Y. 2012. Real-time PCR detection of the boxwood blight pathogen Calonectria pseudonaviculata. Phytopathology. 102(7):S4.26-S4.27.
Colletotrichum fungal pathogens and symbionts of ornamental nursery and landscape plants -
Crouch, J. 2012. Colletotrichum fungal pathogens and symbionts of ornamental nursery and landscape plants. Phytopathology. 102(7):S4.26-S4.27.
The role of herbaria and culture collections -
Verkley, G., Rossman, A.Y., Crouch, J. 2015. The role of herbaria and culture collections. In: McLaughlin, D.J., Spatafora, J.W., editors. The Mycota VII: Systematics and Evolution, Part B. 2nd edition. Berlin: Springer-Verlag. p. 205-225.
Biology and pathology of turfgrass anthracnose -
Crouch, J., Clarke, B.B. 2012. Biology and pathology of turfgrass anthracnose. Golf Course Management. 80(5):96-102.
Biology and pathology of turfgrass anthracnose -
Crouch, J., Clarke, B.B. 2012. Biology and pathology of turfgrass anthracnose. USGA Turfgrass and Environmental Research Online. 11(5):1-7.
Anthracnose disease of centipedegrass turf caused by Colletotrichum eremochloae, a new fungal species closely related to Colletotrichum sublineola -
Crouch, J., Tomaso-Peterson, M. 2012. Anthracnose disease of centipedegrass turf caused by Colletotrichum eremochloae, a new fungal species closely related to Colletotrichum sublineola. Mycologia. 104(5):1085-1096.
Diagnosis of centipedegrass anthracnose caused by Colletotrichum eremochloae sp. nov. -
Vines, P.L., Tomaso-Peterson, M., Crouch, J. 2012. Diagnosis of centipedegrass anthracnose caused by Colletotrichum eremochloae sp. nov.. Phytopathology. 102(4):S2.10.
Molecular analysis of turfgrass rusts reveals the widespread distribution of Puccinia coronata as a pathogen of Kentucky Bluegrass in the United States -
Beirn, L., Moy, M., Meyer, W., Clarke, B., Crouch, J. 2011. Molecular analysis of turfgrass rusts reveals the widespread distribution of Puccinia coronata as a pathogen of Kentucky Bluegrass in the United States. Plant Disease. 95:1547-1557.
Culture-independent, real-time PCR typing of Colletotrichum cereale specimens from modern and historical collections using the Apn2 marker -
Beirn, L., Clarke, B., Crouch, J. 2011. Culture-independent, real-time PCR typing of Colletotrichum cereale specimens from modern and historical collections using the Apn2 marker [abstract]. American Phytopathological Society, August 6-10, 2011, Honolulu, HI. paper no. 101:S14.
Turfgrass diagnostics and new, advanced technologies -
Beirn, L., Njambere, E., Zhang, N., Clarke, B., Crouch, J. 2011. Turfgrass diagnostics and new, advanced technologies. Phytopathology. 101:S211.
A Panel of SNP-Based Real-Time PCR Probes for the Rapid and Accurate Detection of Ug99 -
Crouch, J., Sakthikumar, S., Cuomo, C., Pretorious, Z.A., Szabo, L.J. 2010. A Panel of SNP-Based Real-Time PCR Probes for the Rapid and Accurate Detection of Ug99. International Wheat Conference Proceedings. p. 477.
Application of Comparative Genomics for the Identification and Monitoring of the Highly Virulent African Race, Ug99, of Puccinia graminis -
Crouch, J., Sakthikumar, S., Cuomo, C., Stoxen, S., Pretorious, Z.A., Szabo, L.J. 2010. Application of Comparative Genomics for the Identification and Monitoring of the Highly Virulent African Race, Ug99, of Puccinia graminis [abstract]. Phytopathology. 100:S156.
Real-Time PCR Detection of the Southern Corn Rust Pathogen Puccinia polysora -
Crouch, J., Szabo, L.J. 2010. Real-time PCR detection of the southern corn rust pathogen Puccinia polysora [abstract]. Phytopathology. 100:S27.
A Panel of SNP-Based Real-Time PCR Probes for the Rapid and Accurate Detection of Ug99 -
Crouch, J., Sakthikumar, S., Cuomo, C., Pretorious, Z.A., Szabo, L.J. 2010. A Panel of SNP-Based Real-Time PCR Probes for the Rapid and Accurate Detection of Ug99. Proceedings of Agricultural Research Service Global Change Workshop. p. 28.
Real-time PCR discrimination of the southern and common corn rust pathogens Puccinia polysora and P. sorghi -
Crouch, J., Szabo, L.J. 2011. Real-time PCR discrimination of the southern and common corn rust pathogens Puccinia polysora and P. sorghi. Plant Disease. 95(6):624-632.
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