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May 07, 2009
Schofield Media Growers have a wide range of PGRs to choose from to meet the growing requirements of their crops and the shipping requirements of their customers. One of the newest chemicals on the market is Fine Americas Inc.’s Configure, a...
April 09, 2008
We have been working on branching of herbaceous perennials for more than 15 years. Some things have worked better than others, but one of the best examples is the use of benzyladenine (6-BA) on echinacea. We finally have a labeled and effective 6-BA...
August 20, 2007
Believe it or not, it’s already time to begin thinking about height-control options for your poinsettia crops. Today’s poinsettia growers have many plant growth retardants (PGRs) and application methods to choose from to control height. Many growers...
January 16, 2007
In the first article of this series, we discussed application considerations and optimal rates of Topflor (flurprimidol) on potted plants. In this article, we focus on spring bedding plants. Throughout the past five years, we have conducted...
December 13, 2006
There have not been many plant growth regulators introduced for greenhouse crops over the past 15 years. One of the newer PGRs is Topflor (flurprimidol). At North Carolina State University, we have conducted extensive trials over the past five...
November 15, 2006
Post-patent products, new experimental products and an evolution in how chemicals are applied are the topics in this year’s look at plant growth regulator (PGR) trends. All of our registered growth regulators are older chemicals and no longer...
November 07, 2005
Well, we don’t have a banner year for the availability of new chemistry or new labels, but there are two new paclobutrazols, Paczol (Chemtura Corp.) and Downsize (Greenleaf Chemical LLC), and a new gibberellin/ cytokinin product, Fresco (Fine...
July 12, 2005
The “liner dip” is a new and effective method for applying plant growth regulators (PGRs). It is an efficient way to treat large numbers of plants with minimal labor and chemical. Liner dips can be particularly beneficial for very vigorous crops...
May 17, 2005
The letter in question here is Q. What does it mean to have Q-Biotype whiteflies instead of B-Biotype whiteflies. The quick answer is no one really knows yet, but it’s the long answer that the industry has been grappling with for the past few weeks...
April 25, 2005
Producing compact bedding plants often involves a chemical means of height control. Sumagic (uniconazole, Valent USA Corp.) is a plant growth-regulating chemical that reduces stem elongation and is used to control height of ornamental plants. In...
March 04, 2005
With spring season nearly upon us (or in full swing for those growers far south and west), everyone is getting extremely busy taking care of all those crops in the greenhouse. Days are full of transplanting, watering, moving crops, spraying and...
November 11, 2004
In my 18 years of working with plant growth regulators (PGRs), I have never had a more active research year; we have worked with more potential PGR products this year than ever before and are also seeing a lot of interest in applying old chemistries...
August 10, 2004
In the past decade, the perennial industry has become a significant segment of floriculture crop production. Similar to vegetative annuals, new cultivars of perennials are released every year, many of which are propagated by cuttings. In most cases...
August 10, 2004
Are you ready for another twist to growth regulator applications for poinsettias? Many growers become very structured and resistant to change when it comes to how to grow poinsettias. Poinsettias are such a big crop with a long crop time and many...
July 08, 2004
Now that the spring season is behind everyone, it’s time to look back at how well you were able to grow vegetative annuals. I know I have written about growth control of these plants before, but I think this is a good time to reiterate what was...
July 08, 2004
We are seeing rapid growth in the market for plants that can work in 41?2-inch to 1-gal. containers. In the industry’s quest for what’s new to be put in smaller containers, we sometimes overlook old favorites. An example is ivy geraniums; our...
June 18, 2004
Growers are challenged to keep 4- and 5-inch annuals with trailing, spreading growth habits sufficiently compact. It is of great interest to growers to find plant growth regulators (PGR) that stimulate lateral bud development and branching and...
April 16, 2004
As consumers realize their appeal, pansies and violas are increasingly being planted outdoors in late summer and early autumn. Consequently, the production of flowering pansy continues to increase, especially for sales in late summer. To meet...
December 12, 2003
Though the Scrophulariaceae and Verbenaceae family names may not sound too familiar, you've most certainly grown some member species. Here, we will look at the currently known responses of perennial plants from these families to plant growth...
November 06, 2003
Each year when we do this special chemical section in GPN, I'm a little envious of the insect and disease folks; they always seem to have new stuff to talk about. New plant growth regulators (PGR) just do not come along as fast. In fact, for the "...
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