Heat Delay in Poinsettias
Greenhouse Product News
August 2008
By Rebecca Schnelle and Jim Barrett
Updated research on exposing crops to higher temperatures shows their effects on color development and production, as well as how day and night temperatures impact heat delay.
Strategic Temperature Management for Poinsettias
Greenhouse Product News
July 2008
By Jim Faust, Kelly Lewis, Niharika Komaraboina, Vijay Rapaka, Ryan Knauer and Turoop Losenge
Trials at Clemson University show great promise for successful cold production of many poinsettia varieties.
Creating an Online Community
Greenhouse Product News
May 2008
By Darhiana Mateo
After some initial hesitation, growers across the country are turning to online tech help bulletin boards for fast, accurate information —and even a little camaraderie.
New Releases for 2008
Greenhouse Product News
February 2008
By John Dole and Jim Barrett
From the classic to the unconventional, new introductions stole the show at the National Trials this year.
PDF Version
Cultivar Recommendations
Greenhouse Product News
February 2008
By Jim Barrett and John Dole
Need helping deciding which poinsettia cultivars would best serve your specific needs? From the tried and true to bold new inventions, these recommendations can point you in the right direction.
PDF Version
Increasing Poinsettia Size
Greenhouse Product News
October 2007
By Erik Runkle
Are your potted poinsettias vertically challenged? When applied on young stems before the first hint of color, chemicals can help promote stem extension and take your plants to new heights.
Early PGR Drench Applications On Poinsettias
Greenhouse Product News
August 2007
By Roberto Lopez and Erik Runkle
A new technique to inhibit stem extension of poinsettia is to apply an early, low-dose PGR drench. This article will compare the efficacy of low dose and early drench applications of paclobutrazol on poinsettia crops.
PDF Version
Propagating Poinsettias
Greenhouse Product News
August 2007
By Erik Runkle
Poinsettia propagation can be challenging, especially during the summer. Here are some tips to help ensure successful propagation of nonrooted poinsettia cuttings.
PDF Version
Graphical Tracking
Greenhouse Product News
July 2007
By Erik Runkle
Graphical tracking, a decision-support tool, can help growers monitor plant height throughout production and identify when plants are too tall or too short.
PDF Version
Recommended Cultivars
Greenhouse Product News
February 2007
By John Dole and Jim Barrett
The number of poinsettia cultivars that are available to growers continues to increase. You need to be sure your selected cultivars are right for your growing operation. These recommendations should help provide you with the information you need.
PDF Version
Managing Lewis Mites On Poinsettia
Greenhouse Product News
August 2006
By Daniel Gilrein
The Lewis mite is still a threat, but the good news is it is quite controllable. From detection to useful miticides — find out more about controlling this pest on poinsettias.
PDF Version
Consumer Guide To Poinsettias
Greenhouse Product News
March 2006
By John Dole, Allen Hammer and Jim Barrett
Find out if the poinsettias you are growing or plan to grow
will be popular with consumers.
PDF Version
New Releases For 2006
Greenhouse Product News
February 2006
By John Dole, Allen Hammer and Jim Barrett
Not as many new cultivars were introduced this year,
but the ones that were promise quite a show.
PDF Version
Time’s Up
Greenhouse Product News
December 2005
Bridget White, Editorial Director
Biotype Investigation
Greenhouse Product News
December 2005
By Jim Bethke, Frank Byrne and Richard Redak
A biotype, B biotype, Q biotype: Researchers have been studying
the differences between these for years, but just how different are
they when it comes to control? This research has the answers.
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.
PDF Version
Subirrigating Poinsettia with Bonzi
Greenhouse Product News
August 2005
By Douglas Cox
In the August 2003 issue of GPN I reported the results of a seed geranium study, demonstrating that Bonzi successfully controlled plant growth when applied by subirrigation once or in dilute amounts applied 11 times. In this experiment growth control with Bonzi was not affected by subirrigation stock tank dilution unless it was 60 percent or more.
PDF Version
Picking Popular Poinsettias
Greenhouse Product News
March 2005
By John Dole, Jim Barrett and Allen Hammer
Obviously, any grower focusing on novelties would want to grow these cultivars.
PDF Version
2004 National Poinsettia Trials
Greenhouse Product News
February 2005
We hope these trials help growers focus on which cultivars might be the best fit in their operation based on their market and production style.
PDF Version
Recommended Cultivars
Greenhouse Product News
February 2005
By Allen Hammer, John Dole and Jim Barrett
The best cultivar for an individual grower depends on their location, production practices, market and personal preference.
PDF Version
Producing Poinsettias Cold
GPNmag.com
January-December 2005
Rebecca Siemonsma
Learn how to mitigate the risk of producing poinsettias at lower than normal temperatures.
Holiday Companion Plants
Greenhouse Product News
December 2004
By Rick Schoellhorn, University of Florida
Sure, poinsettias are the holiday crop,
but is there a market for other holiday crops
to accentuate poinsettias or even just stand alone?
PDF Version
Late-Season Whitefly Control
Greenhouse Product News
October 2004
By Daniel Gilrein
Whiteflies damage a number of crops: verbena, fuchsia, regal geranium, lantana, nicotiana, ageratum and of course poinsettia.
PDF Version
Poinsettias: Early PGR Drench?
Greenhouse Product News
August 2004
By Jim Barrett
Just when you’re getting comfortable with late drenches,
a new technique from the University of florida suggests new drench timing.
PDF Version
It’s Poinsettia Time, Again!
Greenhouse Product News
August 2004
By Roger C. Styer
The biggest poinsettia problems occur in the
first six weeks of the crop, from when you take
or receive a cutting; through propagation,
rooting out and pinching; and up to initiation.
PDF Version
Best of the Best
Greenhouse Product News
February 2004
By Jim Barrett, John Dole and Allen Hammer.
A 'best of the best' from the National Poinsettia Trials.
PDF Version
Recommended Poinsettia Cultivars
Greenhouse Product News
February 2004
There are a large number of poinsettia cultivars that can be produced successfully — too many for any one grower to be familiar with or even test all of them. This list includes varieties that have been in our trials for at least two years.
PDF Version
Winter Rose Early Red
Greenhouse Product News
February 2004
By Jack Williams
The latest improvement in the Winter Rose family is an early-blooming selection.
PDF Version
Poinsettia Vigor and Growth Control
Greenhouse Product News
October 2003
Roger C. Styer
This is the most critical time for last-minute adjustments to poinsettia height control, which determines if you make your specs, and your sale, or not. What complicates this job is the wide range of poinsettia varieties we currently grow. Some of these varieties grow slower than Freedom, while others grow faster. This is what is called poinsettia vigor. And it is something you need to take into consideration.
PDF Version
National Poinsettia Trials 2002
Greenhouse Product News
February 2003
Allen Hammer, Jim Barrett and John Dole
This report has been split up into three sections: cultivars recommended according to grower type (large or specialty), page 10; new introductions, page 16; and the best of the best from the trials, page 20. This is the most complete coverage of last year's poinsettia trials you'll find anywhere, so make the most of it by using these reports to choose the right varieties for your production situation and market.
A New Start
Greenhouse Product News
January 2003
Bridget White
I can always do better. That's how I feel about our industry resolutions -- we can always do better -- that's why I don't think we need to set new resolutions this year.
PDF Version
Using Topflor, Part I :Bedding and Potted Plants
Greenhouse Product News
January 2003
Brian Whipker, Ingram McCall, James Gibson and Todd Cavins
Plant growth regulators (PGRs) are commonly applied to container-grown plants to control stem elongation and produce high-quality, compact plants. Flurprimidol is a "Type 2" PGR, which is similar in its mode of action to A-Rest, Bonzi and Sumagic. Flurprimidol has been labeled as Cutless for turf use in the United States and commercially introduced as Topflor in Europe for greenhouse crops. Cutless has been trialed extensively by Auburn University researchers on nursery crops such as butterfly bush, holly and Mexican sage with growth control comparable to Bonzi and Sumagic.
PDF Version
What's in a Name?
Greenhouse Product News
January 2003
Roger C. Styer
When marketing plants to the masses, you need to consider names as well as plant quality, availability, labels, pots and displays. There has been some discussion about the dumbing-down of America. It is true -- many Americans want things to be simpler. How many people who shop at the big box stores can pronounce Latin names? Yes, they want perennials to be in flower in order to purchase them, but what do they call them? We need to make perennial names more appealing so the average consumer will be attracted to them and know what to ask for.
PDF Version
Who Cares for Poinsettias?
Greenhouse Product News
December 2002
Roger C. Styer
Every year, I am absolutely dumbfounded by the lack of care during handling, shipping, display and sale of poinsettias in the marketplace. Being a consultant, it is easy to point out the problems, but a good consultant also proposes solutions to those problems. So, here are my solutions to improve the care of poinsettias.
PDF Version
Update on Insecticides and Miticides for the Ornamental Market
Greenhouse Product News
November 2002
Jim Bethke
In Ann Chase's description of a list of fungicides she provided last year in her column, she said, "The majority of the products included are currently labeled somewhere in the United States, though you should check the label to see if they are registered for use in your area." I completely agree, and that's the approach I will take in this discussion.
PDF Version
Growth Regulators in Transition
Greenhouse Product News
November 2002
Jim Barrett
The lack of evolution in PGR products has actually been good for growers since they have had the opportunity to become very familiar with the products they use without having to learn new ones. However, changes in the available chemicals started a couple of years ago and will continue for at least a couple of more years.
PDF Version
Grower 101: Diagnosing Plant Diseases of Floricultural Crops
Greenhouse Product News
November 2002
Robert Wick
The ability to make an accurate diagnosis on-site is dependent on a disease that has unique symptoms. Also, the grower needs to have previously identified the problem or have a good illustration or written description to make proper identification. There are a number of diseases that can be easily identified on-site, and there are many that can only be diagnosed in a university or private diagnostic lab.
PDF Version
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.
PDF Version
Using Florel Effectively
Greenhouse Product News
October 2002
Roger C. Styer
Many of the new vegetative annuals are quite vigorous and designed for use in larger containers. However, growers are also producing them for individual sale in smaller pots as well as mixed planters. Whether you buy rooted or unrooted cuttings, the problems are the same ? get plants to branch early to fill out the pots faster and control the growth late.
PDF Version
Late-Season Bonzi Drenches: Northern & Southern Perspectives
Greenhouse Product News
September 2002
Jim Faust and Royal D. Heins
By the late 90s, late-season Bonzi drenches became a standard practice for many Southern growers, while many Northern growers were still appropriately cautious. Currently, late-season Bonzi drenches have been sufficiently tested that both Northern and Southern growers can safely use this technique, provided that the proper guidelines are followed.
Whiteflies Are Not Flies
Greenhouse Product News
August 2002
James A. Bethke, Heather S. Costa and Richard A. Redak
There are over 1,200 species of whiteflies identified worldwide; however, only a few of them are classified as pest species. Newly introduced species of whitefly can quickly become pests and may adapt to new host plants and environmental conditions. For example, one year after the silverleaf whitefly reached greenhouses in California, it replaced the greenhouse whitefly as the dominant species on poinsettias.
PDF Version
GROWER 101: Whiting Out Whiteflies
Greenhouse Product News
August 2002
Stanton GIll
Whiteflies can be very damaging to greenhouse crops and field and greenhouse-grown cut flowers because of their broad host range, resistance to insecticides and potential to vector a variety of plant virus diseases. High populations of whiteflies can weaken plants, causing chlorotic foliage and reduced vigor.
PDF Version
B-Nine + Cycocel: The advantages for poinsettias and pansies
Greenhouse Product News
July 2002
Kelly P. Lewis, Jim Faust and James D. Sparkman IV
Growers have different methods of determining the best B-Nine/CCC combination to use. Our approach was to apply a range of B-Nine (0-4,500 ppm) and Cycocel rates (0-1,500) to identify the interactive effects of these two products when applied as a tank mix. We applied 14 combinations of B-Nine/CCC (see Table 1, page 60) to poinsettias and pansies with the goal of identifying the optimal tank mix combination.
PDF Version
Avoiding Top Problems of Poinsettias
Greenhouse Product News
July 2002
Brian E. Whipker, Colleen Warfield, Raymond Cloyd, James L. Gibson and Todd J. Cavins
Poinsettias can, at times, be a problematic crop, but being aware of the more common nutritional, physiological and insect and disease-related problems encountered during production can help reduce the headaches. By watching for potential problems, understanding their causes and knowing the proper corrective actions to take, one can avoid most of these issues.
PDF Version
What About Generics?
Greenhouse Product News
July 2002
Ann Chase
Although we do not have true generics available for our plant health care needs, we are faced with essentially the same question: What about using a generic? As with most simple questions, the answer is complex.
PDF Version
Top 10 Poinsettia Mistakes
Greenhouse Product News
July 2002
Roger C. Styer
Even though it is mid-summer, poinsettia growers have a long way to go before they can ship their poinsettias. During that long period, many things can go wrong. I’ve boiled down the major mistakes I see poinsettia growers making, along with some suggestions to avoid them. See if any of your mistakes are on this list!
PDF Version
Studying Phytophthora : Foes of Floral Crops
Greenhouse Product News
June 2002
Margery Daughtrey
Phytophthora is one of the special group of plant pathogens termed “oomycetes” — Pythium and the downy mildews are close kin. Analysis of their DNA has indicated that these organisms are more closely related to algae than to fungi. This is the reason why Phytophthora, Pythium and downy mildews are successfully combated by unique fungicides, such as mefenoxam, metalaxyl and dimethomorph, that would not be effective against the true fungi.
PDF Version
Scouting for Mites, Part II
Greenhouse Product News
June 2002
Kevin Donovan
One of the keys to a successful scouting program is being able to accurately identify the pests and diseases you come in contact with. The following is a review of the most prevalent greenhouse mites.
PDF Version
Losing a Leader
Greenhouse Product News
June 2002
Bridget White
It is no exaggeration to say that the “Paul Ecke” name is synonymous with poinsettias in every corner of the globe. Quite simply, Paul Ecke Jr. helped revolutionize the way poinsettias are bred, produced and sold.
PDF Version
Maximizing Fertilizer Use and Minimizing Runoff
Greenhouse Product News
May 2002
John M. Dole and Janet C. Cole
Controlling fertilizer and water use and runoff is a necessity for some businesses due to their proximity to environmentally sensitive natural areas or water sources. Reducing water and fertilizer use for many businesses, however, is becoming increasingly important to control expenses. Research at North Carolina State University and Oklahoma State University is shedding new light on how to manage fertilizer and water use.
PDF Version
Which Poinsettias do Consumers Prefer?
Greenhouse Product News
April 2002
Jim Barrett, Rick Schoellhorn and Allen Hammer
Consumer surveys were conducted at Purdue University and the University of Florida, and the results are presented here. While there are some differences in the details of the results, the general information generated by the two studies provides important information.
PDF Version
Best of the Best: 2001 Poinsettia Trials
Greenhouse Product News
February 2002
Jim Barrett and Allen Hammer
The following are the cultivars that we judged to be the best of the 2001 trials. In most cases, they are newer cultivars that offer a new characteristic, an improvement over current cultivars or fill a void in availabilities. A few are older cultivars that continue to be outstanding.
PDF Version
2001 Poinsettia Trials: Regionally Recommended Cultivars
Greenhouse Product News
February 2002
Jim Barrett and Allen Hammer
The following poinsettia cultivars are recommended for growers to consider. The recommendations are based on university trials and observations of commercial crops. Primarily, this list includes cultivars that the authors have grown at least two years. The cultivars listed as “worth watching” are the new ones that performed well in the Fall 2001 trials.
PDF Version
Don’t Expect Pythium Root Rot to Always Act the Same
Greenhouse Product News
February 2002
Gary W. Moorman and Margery L. Daughtrey
Cornell University trials are teaching researchers more about this troublesome pathogen, how it interacts with the plants it infects and how it is becoming more difficult to control — and what they’ve learned may surprise you.
PDF Version
New at the Trials
Greenhouse Product News
February 2002
P. Allen Hammer, Jim Barrett, Terril A. Nell and Roy A. Larson
With the introduction of so many new and unique poinsettia cultivars, it has become impractical for a grower to evaluate them all. In conjunction with the breeding companies, we organized these trials several years ago to screen the new introductions and help growers in selecting the ones they will evaluate for their own production. Every poinsettia cultivar is different and performs better in some climates and production situations than in others.
PDF Version
Ornamental Disease Control Products —2002 Update
Greenhouse Product News
December 2001
A. R. Chase
Last year, for the first time, GPN published a table, summarizing efficacy results for fungicide and bactericide ornamental trials at Chase Research Gardens. This year, we decided to do the same thing as an annual update.
PDF Version
Add Value to Your Poinsettia Crop, Part I
Greenhouse Product News
December 2001
Josef Fischer and Paul Ecke III
Three for $10, $2.99 with your supermarket card. Is no price too low for the beleaguered poinsettia? How did we get here, and what can we do?
PDF Version
Managing Spider Mites: The New and the Old
Greenhouse Product News
October 2001
Richard K. Lindquist
Spider mites have been around for a long time, and so have some of the treatments for them. Lately, improved application methods and new chemical have brought this pesky group back into the spotlight.
PDF Version
Grower 101: Disease Primer, Part II; Root Rots
Greenhouse Product News
October 2001
Jim McLaughlin
The most dangerous threat to roots and stems, root rots can be stopped with proper care and treatment. Here is an outline of what to look for and how to terminate and prevent these diseases.
PDF Version
Strobilurn Fungicides Update
Greenhouse Product News
September 2001
A.R.Chase
This "new" chemical class continues to gain usage among growers. Below are the latest developments in strobilurn research.
PDF Version
Figuring Out Fertilization
Greenhouse Product News
September 2001
Marc van Iersel, Bodie Pennisi and Paul Thomas
Understanding how to perform a few simple tests can help your fertilization program from interfering with your crop schedule and save your margins.
PDF Version
Growing the Newest Poinsttia Cultivars
Greenhouse Product News
August 2001
By Jim Barrett and Allen Hammer
Breeders have introduced a large number of potentially important new poinsettia cultivars in the past two years, and this fall many growers will be producing some of them for the first time.
PDF Version
2001 Update on Powdery Mildew Control
Greenhouse Product News
July 2001
By A. R. Chase
The beginnings of a crop disease outbreak can slip even the most scrutinizing eye – find out which fungicides make the grade for effective control of powdery mildew.
PDF Version
Pests & Diseases
Greenhouse Product News
June 2001
Stanton Gill
Mites have long been a problem for growers; the best way to combat them might be to combine chemical and biological methods.
grower 101
Greenhouse Product News
June 2001
Raymond A. Cloyd and Edmond R. Zaborski
Fungus gnats have been hard to control, and insecticide resources are dwindling. A University of Illinois study is now underway that may give you the keys to control this pest.
PDF Version
Pests & Diseases
Greenhouse Product News
May 2001
M. L. Daughtrey, M. K. Hausbeck, J. Byrne and Larry Barnes
Using forecasts and alternatives to traditional fungicides can help in the constant battle against powdery mildew, Botrytis and downy mildew.
Marketing
Greenhouse Product News
April 2001
Kurt Fromherz
Reap the benefits of a successful marketing package. Differentiate yourself and make perception
of your product a reality through a complete sell-through program.
So, What Type of Poinsettia Do Consumers Prefer?
Greenhouse Product News
March 2001
Jim Barrett, Carolyn Bartuska and Jennifer Campbell Bradley
With the trials behind us, it’s time to shift our attention from the varieties
that are easiest to grow to those consumers prefer.
plant nutrition
Greenhouse Product News
March 2001
John D. Lea-Cox, David S. Ross, K. Marc Teffeau and Ellen N. Varley
Management Planning —A New Paradigm for the Nursery and Greenhouse Industries
In light of increased EPA regulation of the floriculture industry, growers should start evaluating fertilizer use and greenhouse runoff. A new program developed at the University of Maryland provides an easy to use model that is applicable to most growing operations.
PDF Version
2000 Poinsettia Trials
Greenhouse Product News
February 2001
James E. Barrett and P. Allen Hammer
The range of growing conditions across the country necessitates the use of
different cultivars in the North and South. These regional selections should help you choose which cultivars will work best under your growing conditions.
2000 Poinsettia TrialsBest of the trials:
Greenhouse Product News
February 2001
P. Allen Hammer and James E. Barrett
Poinsettia breeders have produced another crop of outstanding varieties. A few recommendations from top researchers should help make
ordering decisions a little easier.
production technology
Greenhouse Product News
February 2001
James E. Faust and Pamela C. Korczynski
Growing hanging baskets above a
bench crop might be an efficient use
of space, but without considering the
ways this will impact light distribution,
you could end up with unsalable plants.
PDF Version
2000 Poinsettia Trials
Greenhouse Product News
February 2001
By P. Allen Hammer,James E. Barrett,Terril A. Nell and Roy A. Larson
Once again, GPN brings you the industry's most complete coverage of last year poinsettia trials; from culture points to classifications and everything in between.
Gazing into the Crystal Ball
Greenhouse Product News
January 2001
Assorted Experts
Are we truly on the verge of entering a (greenhouse) space odyssey, or will 2001 be just another year in the industry? Some of your industry peers have braved the elements to predict where current trends will shoot us off to in the not-so-distant, biotechnology-saturated future.
PDF Version
Comparing Substrate Tests
Greenhouse Product News
January 2001
Todd J. Cavins, Brian E. Whipker and William C. Fonteno
If media is the first component in producing a healthy plant, substrate testing should be a common practice in the greenhouse. Here are the facts to help you decide which testing method is best for you.
Culture Tips for Sonora Poinsettias
Greenhouse Product News
December 2000
By Gary Falkenstein
White Glitter, a new addition to Fischer’s Sonora line of poinsettias, combines traditional dark-green leaves with uniquely-colored red and white bracts.
Irrigation
Greenhouse Product News
November 2000
Bodie V. Pennisi and Marc van Iersel
A new study shows that subirrigating
poinsettias may be
one way to get your crop the nutrients
it needs and spare
the environment;
all without the
need for leaching.
pohmer on marketing
Greenhouse Product News
November 2000
Stan Pohmer
A few key marketing strategies can help you move all of your inventory for the
holiday season, as well as teach you a thing or two for the rest of the year.
Poinsettias
Greenhouse Product News
November 2000
Roger C. Styer
Distinguish your crop
from the competition with
a few last-minute pointers
to polish your poinsettia plants.
greenhouse structures
Greenhouse Product News
November 2000
Bridget White
Research shows that photoselective films can reduce the use of growth
regulators and fungicides, lower greenhouse temperatures and decrease water usage. But just how useful are they to the average grower?
crop protection
Greenhouse Product News
October 2000
Jim Willmott
Cooperative Extension Programs at Rutgers and Cornell have teamed up to create a digital newsletter to inform greenhouse growers about pest outbreaks and management options.
poinsettia production
Greenhouse Product News
September 2000
Paul Fisher
New software from the University of New Hampshire offers growers a tool for height control on poinsettias.
grower 101
Greenhouse Product News
September 2000
Jim Barrett
Understanding the effects of greenhouse temperatures is one of the most important elements of successful crop production. This month we’ll discuss the impact of temperature on crop development.
New Resources For Long-Suffering Poinsettia Growers
Greenhouse Product News
August 2000
Jim Barrett
Thanks to the efforts of several leading poinsettia experts, along with four major breeders, growers now have easy access to the most current information on this challenging crop.
Give Your Pansies a Fall Check-Up
Greenhouse Product News
July 2000
Roger C. Styer
If fall pansies weren’t so profitable and in demand, growers might not put up with the challenges of summer heat,humidity and rainfall; but this crop responds with flying colors to the extra measure of care and diligence.
The Slippery Plant Pests: Algae, Moss and Liverwort
Greenhouse Product News
July 2000
A. R. Chase
These "simple plants" flourish in the greenhouse environment and appreciate any fertilizer or water not taken up by greenhouse crops; they present a major prevention and control challenge.
Branding: Just the Tip of the Iceberg
Greenhouse Product News
May 2000
Stan Pohmer
A successful brand carries the implicit promise of quality, performance, ease of use, or any number of other qualities; think twice about branding your products if they can’t deliver on what you promise.
The Effects of Bacterial Diseases on Greenhouse Floral Crops
Greenhouse Product News
April 2000
Margery Daughtrey
The telltale symptoms of bacterial diseases may or may not be similar to those of fungal diseases; in either case, accurate identification is the basis for immediate response and for refining ongoing disease control management.
Cinnamite: Reports From the Field
Greenhouse Product News
March 2000
Jerry Schleicher
In search of an alternative for mite and aphid control, greenhouse growers have been taking a close look at Cinnamite, a new product that represents a new class of natural, contact pesticide.
Marketing the Perfect Pest
Greenhouse Product News
March 2000
Tom Cosgrove
When I encountered noted innovator and defrocked plug guru Rott Schnakebitte at yet another academic gathering (this time the Floriculture Forum, which convened a few weekends ago at the Chicago Botanical Gardens), I finally asked how he was gaining admittance to so many prestigious think-tank events. "The universities that sponsor these events are fiercely non-discriminatory," he replied.
Evaluating the New Poinsettias: A Report from Louisiana
Greenhouse Product News
March 2000
Patricia C. Branch and Jeff S. Kuehny
The 1999 Louisiana State Univsersity Poinsettia Open House, which attracted South Gulf growers with diverse wish lists, also featured an intriguing pinch strategy.
Rhizoctonia Diseases on Ornamentals
Greenhouse Product News
March 2000
A. R. Chase
Capable of causing diseases on foliage as well as on roots and stems, Rhizoctonia spp., are among the most diverse of the fungal pathogens; proper identification is necessary for best control.
The New Cultivars
Greenhouse Product News
March 2000
Growers are always interested in new early reds such as ‘Nova Red’, ‘Galaxy Red’ and ‘Orion Red’ from last season. Nonetheless, most growers in the Gulf South are staying with ‘Freedom Red’ (for now).
Culture Tips for Orion Red
Greenhouse Product News
February 2000
Harvey J. Lang
This popular, showy early-season poinsettia does not require a cultural program particularly different than that for other early-season varieties, just attention to detail.
Gazing into the Crystal Ball
Greenhouse Product News
January 2000
Assorted Experts
We’ve scoured the industry for those who possess divination, or at least some clue as to where we’re heading.
Common Misconceptions About Substrates
Greenhouse Product News
January 2000
By William C. Fonteno
Mixed up about substrates? Learn to control chemical contamination while making the best use of new substrate mixes.
The Cost and Value of Poinsettia IPM Scouting
Greenhouse Product News
December 1999
Alan H. Michael, Roland Freund, Judy Smith and Robert D. Berghage
A Penn State study shows that both small and large poinsettia producers can benefit (and at about the same cost) from a weekly scouting program conducted through a crop management association.
What Went Wrong (or Right) With My Poinsettias?
Greenhouse Product News
December 1999
Roger C. Styer
Hopefully, you’re feeling good about the poinsettia crop you’ve just shipped out. If you’re not feeling that good, this checklist should help you improve your next poinsettia crop.
The Softening of Ethics in the Breeding Industry
Greenhouse Product News
October 1998
Paul Ecke, Jr.
One of the pioneers in poinsettia breeding addressed what he sees as a proliferation of "copycat" cultivars, explains why this should be of concern to growers, and proposes a solution. Part I of this article ran in September 1998, GPN.
The Softening of Ethics in the Breeding Industry
Greenhouse Product News
September 1998
Paul Ecke, Jr.
One of the pioneers in poinsettia breeding addresses what he sees as a proliferation of "copycat" cultivars, and explains why this should be of concern to growers.
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