Keywords

  • disease management
  • diseases in floriculture crops
  • diseases of ornamentals
  • dogwood anthracnose
  • downy mildew
  • floriculture crop pathology
  • phytophthora
  • plant disease control
  • powdery mildew
  • pythium

Daughtrey, Margery L.

Senior Extension Associate
Improving disease management for ornamental crops is the purpose of my program, with the emphasis on developing new information to benefit the floriculture industry of New York. Greenhouse flower businesses are often located in highly populated areas, and thus have many neighbors who are concerned with environmental safety. Increasingly, growers are challenged with the need to control diseases with minimal chemical input—and yet reliable information on cultural and biological methods of control and reduced-risk chemicals still needs to be developed for practical application. Hundreds of new crop species and cultivars are introduced annually, so that there are also many new diseases to study each year. One important new trend is that the cuttings for many vegetative annual crops are now produced off-shore, increasing the chance for introduction of exotic pathogens (e.g. the new downy mildew seen on coleus beginning in 2005) that represent a threat to US horticulture, and sometimes to US agriculture. Providing timely guidance to producers both off-shore and at home is essential for reducing disease losses and pathogen spread within the greenhouse industry. New culture methods (i.e. recirculating subirrigation in flood-floor or ebb/flood systems) designed to reduce run-off from production facilities have increased the opportunity for pathogen spread within greenhouses, and thus new control systems must be implemented to cope with these new challenges. The information that I collect through disease diagnosis, research and networking with other plant pathologists is delivered to growers, industry tradespeople and extension educators at conferences and individually. On the national level, I work closely with the Society of American Florists and the American Phytopathological Society to improve communication of disease management information. I aim to disseminate current knowledge of disease management (IPM) techniques to growers, arborists, landscape gardeners and Master Gardeners. My objectives include improving the utility of biocontrols and cultural controls for management of Pythium, Phytophthora, Fusarium and powdery and downy mildew diseases. I am currently writing an illustrated reference on diseases of herbaceous perennials.

research

research and scholarship focus

My research focuses on improving management of diseases that are currently problematic in greenhouses and nurseries in New York. In recent years, I have been concentrating attention on the foliar diseases powdery mildew and downy mildew, and the root diseases caused by Pythium, Phytophthora and Thielaviopsis.

research areas

affiliations

academic staff in

service

outreach focus

My extension focus is on the communication of skilled identification and management techniques for the many diseases affecting ornamental plants. The primary audience is growers of greenhouse and nursery crops in New York and beyond.

current professional activities

  • Member In
    • American Phytopathological Society (APS)
    • Northeastern Divison, APS (Past-President)
    • Society of American Florists
    • International Society of Arboriculture

background

educational background

  • M.S., University of Massachusetts, 1978
  • B.S., College of William and Mary, 1975

professional background

  • 1978-1988, Extension Associate, Cornell University
  • 1988-present, Senior Extension Associate, Cornell University

awards and distinctions

  • Publications Committee Award, PPGA, 1989 and 1992
  • College-Based Staff Award, Epsilon Sigma Phi, 1992
  • Alex Laurie Award for Research and Education, Soc. of American Florists, 1998
  • Bedding Plants International Futura Award, 2000
  • Distinguished Service Award, NE Division, Amer. Phytopathological Society 2003
  • Citizen of the Year Award —Long Island Farm Bureau, 2004
  • Scholar Award —New York State Arborists, 2005

publications

selected publications (listing in progress)

  • Chapters/Reviews (1999-2004):
    • Daughtrey, M. 2004. Greenhouse Plant Pathogens. Encyclopedia of Pest Management, online version. D. Pimentel, ed. DOI:10.1081/E-EPM-120025299
    • Daughtrey, M. L., Hodge, K. T. and Shishkoff, N. 2004. The Powdery Mildews. Pages 117-126 In Trigiano, R. N., Windham, M. T. and Windham, A., eds. Plant Pathology Concepts and Lab Exercises, CRC Press.
    • Daughtrey, M. L., Hodge, K. T. and Shishkoff, N. 2004. Archiascomycete and Hemiascomycte Pathogens. Pages 111-116 In Trigiano, R. N., Windham, M. T. and Windham, A., eds. Plant Pathology Concepts and Lab Exercises, CRC Press.
    • Barnes, L. W., Hausbeck, M. K., and Daughtrey, M. 2001. Managing Powdery Mildew on Gerberas, Pp. 267-270 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Daughtrey, M. 2001. Clean Stock: your plants can’t always live without it. Pp. 221-222 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Daughtrey, M. and Rane, K. 2001. Bacteria vs. Geraniums. Pp. 238-239 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Daughtrey, M. 2001. Restraining Rusts on Your Crops. Pp. 244-245 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Hausbeck, M., Daughtrey, M. and Barnes, L. 2001. Doing It Right: Controlling Mildew on Poinsettias, Pp. 250-253 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Daughtrey, M. 2001. Don’t Make Mistakes with Tospoviruses, Pp. 277-278 In GrowerTalks on Pest Control. Ball Publishing, Geneva, IL, 310 pp.
    • Daughtrey, M. and Donald, P. 2000. Encyclopedia of Plant Disorders, pp. 74-81 in Handbook on Natural Disease Control, Brooklyn Botanic Garden 21st Century Gardening Series, ed. Beth Hanson, 112 pp.
    • Daughtrey, M., Dutky, E. M., Elmer, W. H., Hanson, B., Nameth, S. T. and Putnam, M. 2000. Diseases of Ornamental Plants, pp. 30-50 in Handbook on Natural Disease Control, Brooklyn Botanic Garden 21st Century Gardening Series, ed. Beth Hanson, 112 pp.
  • Refereed Publications 1999-2004
    • Daughtrey, M. and Tobiasz, M. 2004. Control of Rhizoctonia stem canker on snapdragon, 2003. F&N Tests 59:OT047
    • Lamour, K. H., Daughtrey, M. L., Benson, D. M., Hwang, J., and Hausbeck, M. K. 2003. Etiology of Phytophthora drechsleri and P. nicotianae (=P. parasitica) Diseases Affecting Floriculture Crops. Plant Dis. 87:854-858.
    • Daughtrey, M. and Tobiasz, M. 2003. Control of Phytophthora crown rot on poinsettia, 2002. F&N Tests 58:0T037
    • Hernandez, J. R., Daughtrey, M. and Jens, J. 2003. Occurrence of rust disease caused by Puccinia lagenophorae on cineraria in the Americas. Plant Disease 87:1266.
    • Benson, D.M., Hall, J.L., Moorman, G.W., Daughtrey, M.L., Chase, A.R. and Lamour, K.H. 2002. The History and Diseases of Poinsettia, the Christmas Flower. Online. Plant Health Progress. doi:10.1094/PHP-2002-0212-01-RV.
    • Daughtrey, M. and Tobiasz, M. 2002. Fungicidal control of Phytophthora crown rot of calibrachoa, 2001. Fungicide and Nematicide Tests 57:0T07
    • Daughtrey, M. and Tobiasz, M. 2002. Control of verbena powdery mildew with fungicides, 2001. Fungicide and Nematicide Tests 57:OT28
    • Daughtrey, M. and Tobiasz, M. 2002. Biocontrol effects against Pythium root rot of seedling geraniums, 2001. Bilogical & Cultural Tests 17:009.
    • Daughtrey, M. and Tobiasz, M. 2002. Comparison of cultivars for susceptibility to poinsettia scab, 2001. Biological & Cultural Tests 17:009.
    • Kiss, L. and Daughtrey, M. L. 2001. First report of Erysiphe sedi on Sedum spectabile in North America. Plant Disease 85:1125-1212
    • Daughtrey, M. and Tobiasz, M. 2001. Comparison on geranium cultivars for susceptibility to different Pythium species, 2000. Biological & Cultural Tests Report No. 2001:041.
    • Daughtrey, M. and Tobiasz, M. 2001. Evaluation of fungicide programs for control of powdery mildew on poinsettia, 2000. Fungicide and Nematicide Tests 2001:OT25.
    • Daughtrey, M. and Tobiasz, M. 2001. Evaluation of fungicides for control of poinsettia scab, 2000. Fungicide and Nematicide Tests 2001:OT26.
    • Daughtrey, M. and Tobiasz, M. 2000. Evaluation of fungicides for control of powdery mildew on poinsettia, 1999. Fungicide and Nematicide Tests 55:559.
Keywords: disease management, diseases in floriculture crops, diseases of ornamentals, dogwood anthracnose, downy mildew, floriculture crop pathology, phytophthora, plant disease control, powdery mildew, pythium