Proper Plant Growth Regulator Use

Proper PGR Use

Jim Barrett, Environmental Horticulture Department professor at the University of Florida, is one of 15 speakers scheduled to present at the 26th annual Pest & Production Management Conference taking place February 25-27 in Orlando, Fla.

Barrett will be discussing plant growth regulator (PGR) use, a topic he briefly discussed recently with Greenhouse Grower as the February 25-27 conference approaches.

What are the latest PGRs to hit the market and how would you rate their effectiveness?

In terms of size control products, Topflor is the latest product to be introduced and we have done a great deal of work with it. Topflor is a very flexible product that can be used in a wide range of situations. It is active as both a spray and a media drench. Topflor works well on crops sensitive to PGRs and it also can be very good in situations where a lot of control is needed. ConTego will be introduced this year for use in reducing drought stress. It can be very effective and I will discuss strategies for its use.  Another new product is Configure, which is used to promote branching and growers are finding interesting ways of using.

If there’s one PGR application technique or “rule of thumb” most growers should be using yet are not, what is it?

Probably the strongest recommendation I would have for most growers is to learn to use the PGRs earlier in the crop. Applying the PGRs earlier makes it easier to finish the crop at the desired size with less chemical used late in the crop, which then provides the consumer with a plant that performs better. An example would be drench or dip treatments of liners prior to transplanting plugs or rooted cuttings.

Are there any new PGR research developments in regard to poinsettias?

In the past few years we have evaluated using Topflor and Bonzi as drench applications at low concentrations early in the crop. Growers who have tried this early drench strategy have been very successful with it. The early drench gives the grower more options in the use of PGRs and is especially useful on vigorous varieties or on tall crops after the spray cutoff dates. The principle carries over to other crops, and I will discuss some of the Topflor early drench work we have done with seed impatiens and Wave Petunia baskets.

For more information on Pest Management Conference, presented by Society of American Florists and Greenhouse Grower, visit PestAndProductionManagement.com.

Leave a Reply

2 comments on “Proper Plant Growth Regulator Use

  1. Any grower recommendation for the use of topflor
    label instructions seems to be very vague.

    Any info to share
    Thanks
    Paul
    Custom Grown Greehouses

  2. Any grower recommendation for the use of topflor
    label instructions seems to be very vague.

    Any info to share
    Thanks
    Paul
    Custom Grown Greehouses

More From Crop Inputs...
Adult Aphidoletes in web - Feature

May 27, 2017

How to Overcome Biocontrol Challenges by Thinking Outside the Box

With a little creative thinking and adjustments to your strategy, you can overcome your greenhouse biocontrol challenges.

Read More
Greenhouse Plant Nutrition

May 26, 2017

University of Florida Course Helps You Improve Greenhouse Nutrient Management

The University of Florida (UF) Institute of Food and Agricultural Sciences is offering an Advanced Nutrient Management course through its online greenhouse training program.

Read More
Cannabis Seedling

May 20, 2017

Biocontrols: A Practical Option for Cannabis

With limited options for chemical pest control, cannabis growers are incorporating biocontrols into their integrated pest management programs. More education will cement this solution as a viable option in this emerging market.

Read More
Latest Stories
Adult Aphidoletes in web - Feature

May 27, 2017

How to Overcome Biocontrol Challenges by Thinking Outsi…

With a little creative thinking and adjustments to your strategy, you can overcome your greenhouse biocontrol challenges.

Read More
Cannabis Seedling

May 20, 2017

Biocontrols: A Practical Option for Cannabis

With limited options for chemical pest control, cannabis growers are incorporating biocontrols into their integrated pest management programs. More education will cement this solution as a viable option in this emerging market.

Read More
Christmas Cactus

May 18, 2017

How to Increase Branching and Flower Bud Production of …

Based on research completed at North Carolina State University, here are some methods for increasing branching and flower bud production of Christmas Cactus (Schlumbergera bridgessii).

Read More
Herbicide Drift in the Greenhouse

May 15, 2017

How to Identify and Mitigate Herbicide Contamination in…

Herbicides applied off-site or within the greenhouse can significantly damage ornamental and edible crops. Beth Scheckelhoff, an Extension Educator for Greenhouse Systems at The Ohio State University, provides some examples and basic recommendations for mitigating and preventing herbicide contamination and injury in the future.

Read More

May 4, 2017

Bayer Altus Update: Neonic Insect Control Alternative N…

Altus, a butenolide class insecticide with the active ingredient flupyradifurone, will be available beginning May 1, and is labeled for greenhouse and nursery use on ornamental plants, vegetable transplants, and indoor vegetable production.

Read More
Bumblebees

May 2, 2017

Pollinator Update: The Bumblebee on the Endangered List…

With plenty of attention being placed on pollinator health around the country and the world, here’s what you need to know.

Read More
Florikan Space Technology Hall of Fame

April 25, 2017

Out-Of-This-World Plant Nutrition: Fertilizer Company I…

NASA scientists are growing vegetables on the International Space Station using Florikan’s controlled release fertilizer.

Read More
OHP Biosolutions

April 8, 2017

OHP Enters Biocontrols Market With New Product Line

The OHP Biosolutions program will feature insecticides, fungicides, and other products designed to address the expanding segment of growers who use biological products.

Read More
Dramm Low Volume Coldfogger Sprayer

April 2, 2017

Dramm Upgrades Its Coldfogger Low-Volume Sprayer to Imp…

Dramm recently updated its Coldfogger, a targeted low-volume sprayer, to a new model that offers a more durable pump that is easier to use and allows for the use of corrosive chemistries.

Read More

March 20, 2017

AgBiome’s New Zio Biofungicide Receives EPA Regis…

The new biofungicide is the first product from AgBiome, and will be marketed by SePRO Corp. in the ornamentals market.

Read More
Oat Grass Banker System feature

March 20, 2017

How You Can Market the Benefits of Biocontrols

Educating retailers and end consumers about the use of biocontrols and why it’s important has helped Fessler Nursery gain new customers and profits.

Read More

February 28, 2017

OHP Launches New Ovicide/Miticide, Announces Partnershi…

Applause is a new miticide that targets eggs and immature stages of several mite species. Through the Vestaron partnership, OHP will market Spear-O, a toxin-derived bioinsecticide.

Read More

February 26, 2017

AgBiome Will Enter the Ornamentals Market With a New Bi…

AgBiome, a young company with teammates steeped in decades of experience in the crop protection world, sees an opportunity to bring products to market that fill the existing gaps in plant protection. The company has partnered with SePRO to market and distribute Zio, a biological fungicide expecting EPA registration this spring.

Read More
Tomato Spotted Wilt Virus on Osteospormum

February 23, 2017

4 Pathogens to Prepare For in 2017

Early detection of disease and virus symptoms in the greenhouse is critical. One expert says there are a few pathogens in particular that growers should be monitoring.

Read More
Boxwood Blight

February 7, 2017

Boxwood Blight Detection in Illinois Has Growers on Ale…

Symptoms of boxwood blight, which can spread quickly in production facilities, include leaf spots, stem cankers, and defoliation.

Read More
Adult Thrips feature

January 25, 2017

Tips to Stay Ahead of Aphids, Mites, and Thrips

Control these persistent pests with innovative chemistries that will expand your rotation options with new modes of action.

Read More

January 24, 2017

AmericanHort Issues Call to Action on Safeguarding Pyre…

Synthetic pyrethroids, a class of insecticides for nursery and floriculture production and landscape management, are undergoing an EPA registration review with a focus on certain potential environmental effects.

Read More
Effective pest control

January 12, 2017

Prevention and Early Intervention: The Keys to Biocont…

Advance preparation and starting out right helps you implement an effective biocontrol program that reduces pest pressure.

Read More