PGR Liner Dips On Bedding Plants   Greenhouse Product News December 2005   By Matthew Blanchard and Erik Runkle
Michigan State University research of PGR liner dips on five species of bedding plants provides suggested rates and information for greenhouse production.

Cool Campanula   Greenhouse Product News October 2005   By Sonali Padhye, Cathy Whitman, Erik Runkle and Art Cameron
Cooling and daylength can regulate flowering of some campanula species and cultivars.
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Fascination on Poinsettia   Greenhouse Product News September 2005   By Matthew Blanchard, Mike Olrich and Erik Runkle
Did you hit your poinsettias with too much growth retardant? This Michigan State University research shows how to recover.
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Managing Light During Propagation   Greenhouse Product News June 2005   By Roberto Lopez and Erik Runkle
Michigan State University research examines how environmental factors — especially light — influence the rooting and growth of vegetative annual cuttings.
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Sumagic on Bedding Plants   Greenhouse Product News April 2005   By Cathy Whitman, Mike Olrich and Erik Runkle
Usage of this highly active PGR on bedding plants is a risky move; find out how to use it, when it’s best used and how much is recommended based on this MSU research.
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Flowering Spring Cactus   Greenhouse Product News December 2004   By Charles Rohwer, Erik Runkle and Royal Heins
Sure, poinsettias are the holiday crop, but is there a market for other holiday crops to accentuate poinsettias or even just stand alone?

Managing Perennial Stock Plants with Florel   Greenhouse Product News August 2004   By Janelle Glady, Suzanne Lang and Erik Runkle
Michigan State research determines whether Florel can be used as a tool to keep perennial stock plants vegetative and increase the number of cuttings harvested for six perennial species.
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Tender Perennials   Greenhouse Product News June 2004   By Art Cameron, Beth Fausey, Cathy Whitman and Erik Runkle
Even when perennial plants are not rock hardy, some can still have great market potential for northern growers.
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Florel on Summer Production of Pansy   Greenhouse Product News April 2004   By Erik Runkle and Royal Heins
These three factors — high temperature, high light intensity and long days — all contribute to early flowering of pansy. With many spring bedding plants, early flowering can be desirable
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PGR Rates and Timing for Plug Production   Greenhouse Product News November 2003   Catherine Whitman and Erik Runkle
Catherine Whitman is a research technician and Erik Runkle is an assistant professor in the Department of Horticulture at Michigan State University, East Lansing. Erik may be reached by phone at (517) 353-3761 or E-mail at runkleer@msu.edu
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Temperature and Light on Bedding Plants   Greenhouse Product News July 2003   Lee Ann Pramuk and Erik Runkle
Last year, we began to research the effects of temperature and light intensity on four popular bedding plants: salvia 'Vista Red', celosia 'Gloria Mix', marigold 'Bonanza Yellow' and impatiens 'Accent Red'. Our objectives were to determine how temperature and daily light integral influence plant growth and development of these species. From this information, we can predict how changing your environment will influence the timing and quality of your bedding plant crops.
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Grower 101: Controlling Photoperiod   Greenhouse Product News October 2002   Erik Runkle
Successful production of many crops requires an understanding of how plants respond to photoperiod, how photoperiod changes during the year and how to modify the photoperiod to control growth and development.
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