Plant Growth Regulator Update

PGR Update

To help you finish up poinsettia production and move into spring, we’ve asked the leading technical people at companies who market plant growth regulators (PGR) to keep us current on the latest product developments and strategies.

OHP recently acquired the specialty product line from Chemtura Corp., which includes B-Nine WSG and Paczol. “Both are long-time proven PGRs and have a proven track record for delivering growth control and improved crop qualities,” says OHP’s Technical Services Manager David Barcel. “These two materials, combined with the OHP brand Cycocel, will provide growers with most all of their growth control needs for greenhouse and nursery crops.”

Fine Americas has added another PGR, Configure, to its arsenal. Configure increases lateral/basal branching and promotes flowering in certain ornamental crops and reduces overall plant height. The active ingredient is N-(phenylmethyl)-1H-6-amine. It is registered for use on:

– Christmas cactus (schlumbergera) to promote vegetative branching and increase number of flower buds under reproductive conditions

– Plantain lily (hosta) to promote lateral growth of finished plants by inducing the outgrowth of axillary and rhizomic buds and to increase offsets during propagation

– Purple coneflower (echinacea) to increase the number of branches.

Ball Controlled Growth seed treated with A-Rest through a partnership with SePRO has been very well received by growers this first year, says Jayson Force, Ball’s senior product manager for seed. “Ball Controlled Growth has certainly exceeded expectations in its first year,” he says. “The biggest complaint from growers was that there weren’t enough varieties in the program, so next year we’ll have about 450 varieties available as Ball Controlled Growth seed. The message and usefulness of the product really seems to resonate with growers.”

Crops available for treatment include ageratum, dianthus, impatiens, marigolds, ornamental millet, pansies, petunias and zinnias. A-Rest is added during the coating or pelleting process, which provides consistent early growth control to prevent seedling stretch. Growers can reduce their costs by skipping the first one or two PGR applications.

In The Pipeline

OHP is working with a compound that has been shown to increase lateral branch development. “In the Pacific Northwest, fruit tree work has been very positive, as well as many ornamental woody plants,” Barcel says. “Though still under development with Bayer AG, OHP has plans to develop rates and timing for woody and herbaceous crops.”

David Ross, Syngenta’s technical manager for lawn and garden, reports that Primo, which is used in turf grass management, will be able to be used on ornamental grasses in the future. “We’re hoping to add ornamental grasses to the label next season,” he says. 

Research & Technical Support

Valent reports no changes to the Fascination, Sumagic and ProGibb labels, although research is in the works.

“Our information for completed university research trials is limited at this time, however our university research partners continue to work with us on trials and research to discover new ways growers can use these products to better manage plant growth and produce marketable crops,” says Jason Fausey, Valent’s field market development specialist. “We look forward to continuing to work with the growers to help them maximize the benefits from our plant growth regulators.”

Fausey suggests growers take a closer look at late-season Sumagic drench applications for a variety of plant material. “Sumagic has shown to effectively reduce unwanted plant stretch in some of the most aggressive plant material, even when applied at low rates,” he says. “Low-rate drenches of Sumagic are a simple and cost-effective way to better manage plant growth. Additionally, drenches provide flexibility over spray applications, as they can be applied later in the crop’s development and have less of an impact on potentially decreasing flower size.”

OHP reports poinsettias continue to be a key crop for research. “Recent research has suggested the opportunity to produce a poinsettia crop using very low drench dose rates of Paczol (1/10 ppm) starting in early September and can be applied as needed to maintain crop height per the poinsettia growth curve model,” Barcel says. “This can be a particularly useful tool for large operations or growers able to chemigate their crop.”

OHP has launched a new Web site called PGRx for prescription growth control information. Growers can log onto www.pgrx.info and access decades of academic and in-house research. “Listed rates give growers a starting ppm rate from which they can adjust to fit their specific growing needs,” Barcel says.

He also offers poinsettia production tips. “Regardless of locations, poinsettias should not receive foliar spray applications of B-Nine after the initiation of short days,” Barcel says. “As a guide, no later than Oct. 1 outside of Florida or after Oct. 25 in Florida. Cycocel can offer a slightly longer window of use, such as Oct. 15 for northern growers having hot and sunny growing conditions, or Oct. 21 for the same conditions in the South. Once November appears, many growers will use a late-season drench of Paczol (Paclobutrazol) at a general rate of ½ ppm to slow down late-season stretch or to hold the crop. The rate depends on your growing conditions and poinsettia variety.”

Syngenta continues to work with Jim Barrett at the University of Florida and other leading universities to identify new opportunities, uses and application methods for Bonzi. Barrett also hosts a Web site (http://hort.ifas.ufl.edu/floriculture/height2007/) that helps growers with poinsettia crop management. “He grows five varieties of poinsettias as a grower would, but according to his management practices,” Ross explains. “This gives growers an opportunity to compare their crops to his and see if they’re on track or falling behind. It’s a positive check, something to compare a crop to.”

Syngenta also has published crop-specific guides for key crops, like pansies and poinsettias, which cover managing insects and diseases, as well as plant growth. “Syngenta prides itself on not just giving growers another jug of product,” Ross says. “We have a new initiative in plant health and are looking at the market more holistically. With the recent acquisitions of Fafard and Fischer, we’re looking at plants and how they interact with chemicals, media and beneficials. We have a much bigger role in ornamentals production in general.”

Leave a Reply

6 comments on “Plant Growth Regulator Update

  1. So am I understanding that Configure can increase the number of flowers, but in which varieties? I am trying to keep my cone flowers vegetative to promote root growth, for better winter survival rates. Do I need to then apply something like Florel to control bud numbers. After my initial application of Configure?

  2. So am I understanding that Configure can increase the number of flowers, but in which varieties? I am trying to keep my cone flowers vegetative to promote root growth, for better winter survival rates. Do I need to then apply something like Florel to control bud numbers. After my initial application of Configure?

More From Crop Inputs...
Triathlon BA container shot

May 24, 2016

OHP’s Triathlon Biofungicide Now Listed By The Organic Materials Review Institute

Triathlon BA is a broad-spectrum preventative biofungicide that provides control of many foliar and soilborne diseases in ornamentals and herbs.

Read More
Pythium On Chrysanthemum

May 20, 2016

How To Prevent Pythium In Fall Garden Mums

Avoid profit loss in fall garden mums due to pythium root rot with good drainage and integrated pest management practices that reduce risk factors.

Read More
Agro-K

May 19, 2016

Agro-K Expands Distribution In New England Through Partnership With Northeast Agricultural Sales

Agro-K, which manufactures conventional and organic foliar plant nutrients, will distribute its full line of foliar fertilizers and soil biological products through NEAG.

Read More
Latest Stories
Triathlon BA container shot

May 24, 2016

OHP’s Triathlon Biofungicide Now Listed By The Organic …

Triathlon BA is a broad-spectrum preventative biofungicide that provides control of many foliar and soilborne diseases in ornamentals and herbs.

Read More
Two-spotted spider mites, adults and eggs

May 11, 2016

SePRO Launches Summer Insecticide Management Program Fo…

The program is designed to help growers use SePRO’s insect management tools to prevent plant damage from a variety of pests.

Read More
Small Aphid Colony on Calibrachoa

May 2, 2016

How To Stop Aphids In The Greenhouse

When untreated, aphids damage ornamental crops and act as vectors for disease. Integrated Pest Management combined with vigilant scouting can help you stay ahead of the problem.

Read More
Cicada (Greg Hoover, Penn State)

April 26, 2016

Cicadas Set To Emerge In Several Eastern States This Sp…

While there’s no immediate cause for alarm, experts say the cicada’s egg-laying process can damage woody ornamentals and make them vulnerable to diseases.

Read More
Parisitic Wasp Aphidius colemani

April 25, 2016

Plant Growth Regulator Use Can Affect Biological Pest C…

The use of plant growth regulators may negatively influence the outcome of biological control programs, according to researchers at North Carolina State University.

Read More
Beneficial Insectary Orius insidiosus

April 22, 2016

Beneficial Insectary Increasing Production Of Three Bio…

The company is now producing Orius insidiosus, Dalotia coriaria, and Dicyphus hesperus at its California facility, reducing the transit time of perishable biocontrols between producer and grower.

Read More

April 21, 2016

Michigan State University Offers Tips On Greenhouse Soi…

Improper pH and higher than adequate nutrient levels are among the many reasons for regular soil testing.

Read More
Parasitized aphid mummies, ladybird beetle larvae

April 18, 2016

4 Things You Need To Know About Implementing Biological…

Biocontrols are useful alternatives to traditional pesticides that provide effective pest control in the greenhouse. Here are four ways to get started successfully.

Read More
John Wendorf Bayer Ornamentals

April 14, 2016

Bayer’s New Ornamentals Business Manager Aims To Help G…

John Wendorf, who previously managed BFG Supply’s grower division, says when Bayer launches into the ornamentals market this November, growers will have access to a wealth of resources, including a dedicated team focused on ornamentals growers.

Read More
Emerald Ash Borer

March 22, 2016

Canada Implements New Voluntary Biosecurity Standard Fo…

The voluntary standard is designed to protect the greenhouse, nursery, and floriculture industries from invasive plant pests.

Read More

March 22, 2016

EPA Approves Syngenta’s Mainspring GNL Insecticide For …

Featuring the active ingredient cyantraniliprole, Mainspring GNL provides broad-spectrum control of key pests, such as thrips, whiteflies, aphids, caterpillars, leafminers, and leaf-feeding beetles.

Read More
Black Root Rot on Vinca

March 15, 2016

How To Identify Different Root Rots In The Greenhouse

Root rots can cause similar symptoms on hosts. Here are some tips for scouting in your greenhouse.

Read More
One symptom of Botrytis blight is gray, fuzzy sporulation on foliage and flowers, similar to that shown on the flower of this hibiscus

March 11, 2016

Manage Botrytis With These Cultural And Fungicide Contr…

High relative humidity and low temperatures in the greenhouse open the way for Botrytis to develop on plants. A mix of cultural and fungicide control options will help you manage this common disease effectively.

Read More
Biocontrols and beneficials absolutely can be used in outdoor production, with the use of banker plant systems

March 8, 2016

France-Based InVivo Acquiring Bioline, Syngenta’s Bioco…

Bioline, a subsidiary of Syngenta, specializes in the production and marketing of biological control agents, and in particular macroorganisms active against insect pests in fruits, vegetables, and flowers.

Read More

March 5, 2016

Prevent The Spread Of Disease In Irrigation Water

Water-mold pathogens cause significant crop losses and reduce floriculture crop quality. Take measures in your greenhouse to prevent the spread of diseases like Phytophthora and Pythium.

Read More
Bayer Greenhouse Ribbon Cutting

March 1, 2016

Bayer Opens New Greenhouse Research Facility In West Sa…

The $12 million facility will feature two new high-tech greenhouses that will be used in the development of new solutions in vegetable seeds and biologicals.

Read More

February 20, 2016

Hydrogel Technology Means Growers And Their Customers C…

Water and nutrient management are critical elements for quality plant production in the greenhouse. Maintaining the right amounts of available moisture and fertilizer at all times can be pretty labor intensive, but there are tools available to help you keep these inputs at optimum levels as efficiently as possible. Recently, we visited Evonik Industries’ North Carolina production plant for to see how one of these products — Stockosorb — is made, how it works, and learn the benefits of incorporating these tools in your own operation. Learn more about Evonik Industries’ Stockosorb hydrogel product on the Stockosorb website.  

Read More

February 17, 2016

Why It’s Important To Stay One Step Ahead Of Thri…

Keep thrips populations in check and avoid pesticide resistance by using spray and drench products known for their effectiveness.

Read More
[gravityform id="35" title="false" description="false"]