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Powdery mildew on poinsettia, caused by the fungus, Oidium sp. |
Mary Hausbeck |
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USDA Agricultural Research Service Cooperative Agreement: Novel strategies and technologies for management of water molds and foliar blights affecting floral crops.
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American Floral Endowment: Strategies for mastering downy and powdery mildews in floriculture. |
American Floral Endowment Special Research Reports
Verbena cultivar susceptibility to powdery mildew
Phytophthora species attacking floriculture crops in North Carolina
Downy mildew on snapdragons: Update on environmental monitoring
Managing powdery mildew on verbenas
Managing powdery mildew on poinsettias
Managing Botrytis blight on geraniums
Effect of the environment on powdery mildew of poinsettia
Managing Botrytis blight on poinsettia
Managing downy mildew on snapdragons
Managing powdery mildew on gerbera
Management of a new powdery mildew on poinsettia
Phytophthora nicotianae crown and root rot on snapdragons
Downy mildew on snapdragons: Environmental monitoring and cultivar evaluation |
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| Publications |
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Extension Articles
Downy Mildew on Impatiens
Downy Mildew on Coleus |
Ornamental Disease Management (articles reprinted with permission of Greenhouse Management and Production )
2009. New control products for Botrytis blight. GH Mgt. and Prod. 25(8):Aug 6.
2009. New fungicides offer Phytophthora control. GH Mgt. and Prod. (formerly GMPro)
25(4):41-43.
2008. New products to control Pythium and Botrytis. GMPRO 28(12):38-39.
2008. Watch for downy mildew on coleus. GMPRO 28(8):68-69.
2008. Your mother was right – wash your hands (and everything else). Greenhouse Product News
18(7):40-43.
2008. Take aim to battle 3 common diseases. GMPRO 28(4):44-46.
2007. Research advances for downy mildew control on rose. GMPRO 27(12):50-54.
2007. INSV remains a problem, even after all these years. GMPRO 27(8):69-72.
2007. How to control Phytophthora. GMPRO 27(4):58.
2007. Control tips help manage Pythium rots on plants. GMPRO 27(1):108.
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MSU Greenhouse Alerts
2009. M. Hausbeck and B. Harlan. Strategies for resistance management. Feb 26.
2009. Hausbeck, M., and Harlan, B. Downy mildew update. Feb 26.
2009. Hausbeck, M., and Harlan, B. Powdery mildew update. Feb 26.
2009. Hausbeck, M., and Harlan, B. Botrytis blight update. Feb 26.
2009. Hausbeck, M., and Harlan, B. Phytophthora root rot update. Feb 26.
2008. White rust on mums: Symptoms and management. No. 7, Aug 15.
2008. M. Hausbeck and T. Dudek. Fungicides and black root rot. No. 5, Apr 24.
2007. Does Botrytis have you feeling too warm and fuzzy? No. 8, Apr 11.
2006. Downy mildew on coleus: A new problem. No. 10, May 10.
2006. Symptoms and management strategies for impatiens necrotic spot virus. No. 5, Mar 3.
2005. Web blight on petunias caused by Rhizoctonia. No. 9, Apr 30.
2005. Fungicides and black root rot. No. 7, Mar 28.
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Annual Pest Management Conference, Society of American Florists
Hausbeck, M.K., and Harlan, B. 2009. Strategies for resistance management: Downy mildew and
others. Pp. 25-31 in: Proc. 25th Annual Pest Management Conf., Society of American Florists
and Greenhouse Grower, San Jose CA, Feb 19-21.
Hausbeck, M.K., and
Harlan, B. 2009. What you can’t see, can hurt you. Pp. 36-39 in: Proc.
25th Annual Pest Management Conf., Society of American Florists and Greenhouse Grower, San
Jose CA, Feb 19-21.
Hausbeck, M.K. 2008. Fungicides: What’s new and what’s working. Pp. 21-25 in: Proc. 24th
Annual Pest Management Conf., Society of American Florists, Atlanta GA, Feb 28-Mar 1.
Hausbeck, M.K. 2008. Managing downy mildews. Pp. 98-102 in: Proc. 24th Annual Pest
Management Conf., Society of American Florists, Atlanta GA, Feb 28-Mar 1. |
Journal Articles
Byrne, J. M., Hausbeck, M. K., and Sconyers, L. E. 2005. Influence of environment on atmospheric
concentrations of Peronospora antirrhini sporangia in field-grown snapdragons. Plant Dis.
89:1060-1066.
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.
Byrne, J.M., Hausbeck, M.K., and Shaw, B.D. 2000. Factors affecting concentrations of airborne
conidia of Oidium sp. among poinsettias in a greenhouse. Plant Dis. 84:1089-1095.
Pritchard, P.M., Hausbeck, M.K., and Heins, R.D. 1999. The influence of diurnal temperatures on
the susceptibility of bedding plants to gray mold caused by Botrytis cinerea. Plant Dis. Note
83:589.
Celio, G.J., and Hausbeck, M.K. 1998. Conidial germination, infection structure formation, and
early colony development of powdery mildew on poinsettia. Phytopathology 88:105-113.
Celio, G.J., and Hausbeck, M.K. 1997. Evaluation of poinsettia cultivars for susceptibility to
powdery mildew. HortScience 32:259-261.
Hausbeck, M.K., and Moorman, G.W. 1996. Managing Botrytis in greenhouse-grown flower
crops. Plant Dis. 80:1212-1219.
Pritchard, P.M., Hausbeck, M.K., and Heins, R.D. 1996. The influence of diurnal temperatures on
the susceptibility of poinsettias to Botrytis cinerea. Plant Dis. 80:1011-1014.
Hausbeck, M.K., Pennypacker, S.P., and Stevenson, R.E. 1996. The use of forced heated air to
manage Botrytis stem blight of geranium stock plants in a commercial greenhouse. Plant Dis.
80:940-943.
Hausbeck, M.K., Pennypacker, S.P., and Stevenson, R.E. 1996. The effect of plastic mulch and
forced heated air on Botrytis cinerea on geranium stock plants in a research greenhouse. Plant
Dis. 80:170-173.
Hausbeck, M.K., Welliver, R., and Gildow, F.E. 1992. Tomato spotted wilt virus survey among
greenhouse ornamentals in Pennsylvania. Plant Dis. 76:795-800.
Hausbeck, M.K., and Pennypacker, S.P. 1991. Influence of grower activity on concentrations of
airborne conidia of Botrytis cinerea among geranium cuttings. Plant Dis. 75:1236-1243.
Hausbeck, M.K., and Pennypacker, S.P. 1991. Influence of time intervals among wounding,
inoculation, and incubation on stem blight of geranium caused by Botrytis cinerea. Plant Dis.
75:1168-1172.
Hausbeck, M.K., and Pennypacker, S.P. 1991. Influence of grower activity and disease incidence
on concentrations of airborne conidia of Botrytis cinerea among geranium stock plants. Plant
Dis. 75:798-803.
Hausbeck, M.K., and Gildow, F.E. 1991. Report of tomato spotted wilt virus on Thanksgiving
cactus. Plant Dis. Note 75:215.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1990. Size and flowering of seed- propagated
geraniums in response to fungicide drenching schedules. HortScience 25:644-646.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1989. Damping-off, root rot and lower stem rot
of seed-propagated geraniums caused by Pythium ultimum. Plant Dis. 73:625-627.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1989. The relationship between silver
thiosulphate and premature plant death of seed-propagated geraniums caused by Pythium
ultimum. Plant Dis. 73:627-630.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1988. Control of disease caused by Pythium
ultimum in seed-propagated geraniums sprayed or not sprayed with silver thiosulphate. Plant
Dis. 72:764-768.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1987. Variation in resistance of geraniums to
Pythium ultimum in the presence or absence of silver thiosulphate. HortScience 22:940-944. |
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Plant Disease Management Reports/Fungicide & Nematicide Tests/Biological & Cultural Tests |
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Journal Abstracts
Sconyers, L.E., and Hausbeck, M.K. 2008. Influence of greenhouse environment on atmospheric
Erysiphe cichoracearum conidia and disease on Gerbera jamesonii. Journal of Plant
Pathology 90(2, Supplement):S2.190.
Byrne, J.M., Hausbeck, M.K., and Sconyers, L.E. 2004. Influence of environment on atmospheric
concentrations of Peronospora antirrhini conidia in field-grown snapdragons. Phytopathology
94:S13.
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. Phytopathology 93:S118.
Byrne, J.M., and Hausbeck, M.K. 1999. The effect of temperature on sporulation of Oidium sp.
on poinsettia foliage. Phytopathology 89:S10.
Byrne, J.M., and Hausbeck, M.K. 1999. Management of powdery mildew (Oidium sp.) on
poinsettia. Phytopathology 89:S99.
Daughtrey, M., Byrne, J.M., and Hausbeck, M.K. 1999. Management of a new powdery mildew
on poinsettia. The First International Powdery Mildew Conference, Aug. 29 - Sept. 3, Avignon,
France.
Byrne, J.M., and Hausbeck, M.K. 1998. Influence of temperature and relative humidity on infection
processes and sporulation of Oidium sp. on poinsettia foliage. Phytopathology 88:S134.
Celio, G.J., and Hausbeck, M.K. 1997. Early colony development of powdery mildew on
poinsettia. Phytopathology 87:516.
Pritchard, P.M., Hausbeck, M.K., and Heins, R.D. 1995. Influence of day/night temperatures on
the susceptibility of poinsettias to Botrytis cinerea. Phytopathology 85:1171.
Shaw, B., and Hausbeck, M.K. 1995. Epidemiology of powdery mildew in poinsettia.
Phytopathology 85:1170.
Hausbeck, M.K., and Kalishek, J. 1994. Influence of temperature and relative humidity on
germination of conidia of Oidium sp. on poinsettia. Phytopathology 84:1085.
Celio, G.J., and Hausbeck, M.K. 1994. Susceptibility of poinsettia cultivars to Oidium sp.
Phytopathology 84:1158.
Hausbeck, M.K., Pennypacker, S.P., and Stevenson, R.E. 1991. The effect of modifying the
environment in greenhouses containing geranium stock plants on sporulation of Botrytis cinerea
and Botrytis blight. Phytopathology 81:1176.
Hausbeck, M.K., and Pennypacker, S.P. 1989. Disease incidence and Botrytis cinerea conidial
concentration among geranium stock plants. Phytopathology 79:1149.
Hausbeck, M.K., and Pennypacker, S.P. 1988. Botrytis cinerea conidial concentration within a
geranium propagation greenhouse. Phytopathology 78:1520.
Hausbeck, M.K., and Pennypacker, S.P. 1988. Variation in resistance of cutting-propagated
geraniums to leaf blight caused by Botrytis cinerea. Phytopathology 78:1508.
Hausbeck, M.K., and Pennypacker, S.P. 1987. Effects of grower activity and environmental
modification on Botrytis cinerea conidial concentration in greenhouses. Phytopathology
77:1733.
Hausbeck, M.K., Pennypacker, S.P., and Stevenson, R.E. 1986. Botrytis cinerea spore
concentration among geranium stock plants in the greenhouse. Phytopathology 76:1071-1072.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1985. Variation in sensitivity to Pythium
ultimum in selected seed-propagated hybrid geraniums (Pelargonium x hortorum).
HortScience 75:1305-1306.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1984. Increased Pythium ultimum mortality on
‘Ringo Scarlet’ geraniums treated with silver thiosulphate. Phytopathology 74:882-883.
Hausbeck, M.K., Stephens, C.T., and Heins, R.D. 1984. Increased Pythium ultimum induced
mortality on geranium by application of silver thiosulphate. HortScience 19:570. |
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