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April 20, 2012
There are several plant growth retardants (PGRs) that contain the active ingredient paclobutrazol, including Bonzi (Syngenta), Downsize (Greenleaf Chemical), Paczol (OHP), Piccolo and Piccolo 10XC (Fine Americas). The concentration of paclobutrazol...
November 10, 2011
While the current economic situation is putting extreme pressure on growers, innovators are surviving with new practices, such as treating young plants in plug trays.   Over the past several years greenhouse growers have been forced to adapt to...
September 21, 2011
Paclobutrazol is probably the most widely used active ingredient used to regulate extension growth of floriculture crops in the United States. Paclobutrazol was introduced to the floriculture industry as Bonzi (Syngenta Professional Products) over...
September 21, 2011
Many perennial growers have been trialing the plant growth regulator Configure to improve various aspects of their perennial programs. Growers are seeking to improve branching, increase the number of flowers produced, and to improve plant quality....
April 13, 2011
Uniconazole is the active ingredient in the plant growth retardants (PGR) Sumagic (Valent Professional Products) and Concise (Fine Americas). On a part per million (ppm) basis, uniconazole is the most active and persistent PGR used for height...
April 12, 2010
Despite the availability of many different plant growth regulators, their spraying methods are generally similar. How can you get the most out of each application? Plant growth regulators (PGRs) are commonly applied as sprays to inhibit extension...
October 28, 2009
For years, there have been no PGRs labeled for use on vegetable transplants. Recently, a supplemental label for Sumagic (uniconazole) has been released to allow foliar sprays on some vegetable transplants: tomato, pepper, ornamental pepper, eggplant...
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...
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