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E.
JAY HOLCOMB
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Professor of Floriculture
65% Teaching
35% Research
Joined department on February 15, 1977
317 Tyson Building
University Park, PA 16802
Ph: 814-863-2258
Email: ejh3@psu.edu
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| Education: |
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PhD., Horticulture, Pennsylvania State University, 1972
M.S.,
Horticulture, Pennsylvania State University, 1968
B.S.,
Horticulture, University of Connecticut, 1966
A.S.,
Horticulture, Ambler Campus of Temple, 1964
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| Educational Programs: |
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- Hort 352, Flower Arranging
- Hort 450, Greenhouse Management
- Hort 453, Flower Crop Production and Management
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| Research Interests: |
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Growth regulator effects on flowering and plant
height of greenhouse flowering crops. This includes methods
of application of growth regulators in conjunction with recycling
nutrient solutions. Adaption of new plant species, such as herbaceous
perennials, as flowering potted plants by using growth regulators
or new production techniques like hydroponics. Examination of
growing media physical characteristics, predominantly water
and air, that affect plant growth. |
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| Recent Publications: |
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- Lamont, W.J., M.D. Orzolek, E.J. Holcomb, K. Demchak, L. White, and B. Dye. 2003. Production System for Horticultural Crops Grown in the Penn State High Tunnel. HortTechnology 13(2):358-362.
- Heinemann, P.H., G. Preti, C.J. Wysocki, R.E. Graves, S.P. Walker, D.M. Beyer, E.J. Holcomb, C.W. Heuser, and F.C. Miller. 2003. In-Vessel Processing of Spent Mushroom Substrate for Odor Control. Applied Engineering in Agriculture 19(4):461-471.
- Young, J.R., E.J. Holcomb, C.W. Heuser. 2002. Greenhouse Growth of Marigolds in Three Leached Sources of Spent Mushroom Compost over a 3- year Period. HortTechnology 12(4):701-705.
- Lamont, W.J., M.D. Orzolek, E.J. Holcomb, R.M. Crassweller, K. Demchak, E. Burkhart, L. White, and B. Dye. 2002. Penn State High Tunnel Extension Program. Hort Technology 12(4): 732-735.
- Holcomb, E.J. and R. Berghage. 2001. Photoperiod, Chilling, and Light Quality During Daylight Extension Affect Growth and Flowering of Tissue-cultured Easter Lily Plants. HortScience 36(1):53-55.
- Heinemann, P.H., R.E. Graves, S. P. Walker, E.J. Holcomb, C. Heuser, D.M. Beyer, G. Preti, C.J. Wysocki, and F.C. Miller. 2001. Aerated Floors for spent mushroom substrate processing. ASAE paper no. NABEC 01-902. The American Society of Agricultural Engineers. St. Joseph, MI. 18 pp.
- Owino, T., J.M. Hamlett, and E.J. Holcomb. 2000. In-Situ Determination of Electrical Conductivity of Potting Media Using Time Domain Reflectometry. Commun. Soil Sci. Plant Anal. 31 (15+16):2685-2705.
- Moorman,G.W., R.J. Lease, K. Brown, J. Lynch, E.J. Holcomb, R. Snyder. 1999. Effects of a Slow Release Phosphorus Fertilizer on Gray Mold of Geranium. Biological and Cultural Tests 14:56.
- Moorman,G.W., R.J. Lease, K. Brown, J. Lynch, E.J. Holcomb, R. Snyder. 1999. Effects of a Slow Release Phosphorus Fertilizer on Pythium Root Rot of Geranium. Biological and Cultural Tests 14:57.
- Koide, R.T., L.L. Landherr, Y.L. Besmer. J.M. Detweiler, and E.J. Holcomb. 1999. Strategies for Mycorrhizal Inoculation of Six Annual Bedding Plant Species. HortScience 34(7):1217-1220.
- Britton, W, E.J. Holcomb, and D.J. Beattie. 1998. Selecting the Optimum Slow-release Fertilizer Rate for Five Cultivars of Tissue-cultured Hosta. HortTechnology 8(2):203-206.
- Holcomb, E.J., D.J. Beattie, and R. Berghage. 1998. Effectiveness of Uniconazole on Lilies at Positive and Negative DIF. PGRSA Quarterly 26(4):178-185.
- Lin, Y.P., E.J. Holcomb, and J.P. Lynch. 1996. Marigold growth and phosphorus leaching in a soilless medium amended with phosphorus-charged alumina. HortScience
3(1):94-98.
- Weaver, S.L., D.J. Beattie, and E.J. Holcomb. 1995. Overwintering spring bulbs in large containers. HortTechnology
5(4):350-351.
- Holcomb, E.J. and P.N. Walker. 1995. Chrysanthemum and
poinsettia growth in coal gasification slag amended media.
Commun. Soil Sci. Plant Analysis 26(15&16):2497-2510.
- Holcomb, E.J. 1995. Flower Industry Expectations of Students.
HortTechnology 5(1):81-83.
- Contrisciano, T.M. and E.J. Holcomb. 1995. Growth of Bedding
Plants and Poinsettias in Mineral Wool and Mineral Wool/Peat
Substrates. Commun. Soil Sci. Plant Anal. 26(3&4):485-501.
- Wickremesinhe, E.R.M., E. J. Holcomb, R.N.
Arteca 1994. A Practical Method for the Production of
Flowering Easter Lilies from Callus Cultures. Scientia
Horticulturae 60:143-152.
- Beattie, D.J., A.M.
Blodgett, and E.J. Holcomb. 1993. Effects of root removal,
irrigation method and ancymidol on flowering of Asiatic
lilies. PGRSA Quarterly 21(2):64-72.
- Holcomb, E.J., S. Gamez, D.Beattie,
and G.C. Elliott. 1992. Efficiency of Fertigation Programs
for Baltic Ivy and Asiatic Lily. HortTechnology
2(1):43-46.
- Holcomb, E.J., K.M.Olson, and N. Khoury. 1991. Comparison
of Growth Retardant Application Methods for Hybrid Lily
Height Control. Plant Growth Regulator Society of
America Quarterly 19(4)217-221.
- Holcomb, E.J., L.D.Tukey, and M.A. Rose. 1991. Effect
of GA on Inflorescence in Uniconazole Treated Chrysanthemum.
HortScience 26(3):312.
- Beattie, D.J., E.J.
Holcomb, and C.F. Deneke. 1990. Effect of Uniconazole and
Paclobutrazol on Plant Height and Flowering in Physostegia
virginiana and Chelone obliqua. Plant Growth Regulator
Society of America Quarterly 18(4):187-193.
- Holcomb, E. J., J. A. Flore, and R. D. Heins. 1988. Photosynthetic
response curves for chrysanthemum grown at different PPF
levels. HortScience 23(1):206-208.
- Schlagnhaufer, B. E., E. J. Holcomb, and M.
D. Orzolek. 1987. Effects of supplementary light, solution
heating and increased solution Ca levels on lettuce production
in Nutrient Film Technique. Applied Agriculture Research
2(2):124-129.
- Koch, G. M. and E. J. Holcomb. 1983. Utilization of recycled
irrigation water on marigolds fertilized with Osmocote and
constant liquid fertilization. J. Amer. Soc. Hort.
Sci. 108(5):815-819.
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