July 27, 2012

Poinsettia Height Control Strategies

The use of a graphical tracking system is highly recommended for poinsettias. With similar day and night temperature setpoints, the need for chemical height control is minimal for many varieties. When day temperatures are more than 5°F higher than night temperatures, a Cycocel spray at 750 to 1,000 ppm one to four times after pinching is sufficient in Northern climates to control stem extension. When day temperatures are greater than 80°F and night temperatures are greater than 70°F, spray a tank mix of Cycocel at 1,000 ppm plus B-Nine at 1,500 ppm one to three times, one to four weeks after pinching. Bonzi sprays can also be used at 5 to 10 ppm under these warm growing conditions. Proper growth regulation before and after the pinch, combined with high light conditions are critical to avoid early internode stretch and to build a sturdy plant. Avoid B-Nine and Bonzi sprays after […]

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April 25, 2012

Timing Fungicides And PGRs To Control Greenhouse Pests

The management of pests and diseases during the production of greenhouse crops is not an isolated event. As such, interactions may occur that can have a significant impact on the success of any pest management strategy. For example, under conditions of high relative humidity (greater than 75 percent), naturally-occurring populations of beneficial or insect-killing fungi may cause substantial mortality of insect and mite pests. Although beneficial fungi typically require high relative humidity, these fungi can be effective when the microclimate relative humidity around the spore (e.g., leaf surface) is high. This can occur even when the relative humidity within a greenhouse is less than 50 percent. In addition, the effectiveness of beneficial fungi can vary depending on light intensity, plant size and plant architecture. Fungicides used to manage plant diseases may create issues associated with the compatibility of these chemicals and beneficial fungi, such as Beauveria bassiana, Metarhizium anisopliae and […]

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March 20, 2012

PGR Calculator App: PGR Mix Master

You’ve heard about the Mix Master mobile app from University of New Hampshire Cooperative Extension, now see a demo with Brian Krug. The app is available for iTunes, Android and Blackberry.

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March 2, 2012

Fine Americas, Inc. Expands Its Piccolo Label In Canada

Fine Americas, Inc. announced a label expansion of its Piccolo plant growth regulator (PGR) in Canada on February 20, 2012. The product now can be applied in Canadian greenhouses for height and radius control in poinsettias and pot chrysanthemums. “This is fantastic news for greenhouse ornamental growers throughout Canada,”stated Greg Johnson, president of Fine Americas. “Piccolo has proven to be one of the most trusted PGRs on the market today. And now, Canadian poinsettia and pot mum growers can reap the documented economic benefits of this cost-effective growth regulator.” Kevin Forney, technical services manager for Fine Americas, noted that Piccolo features the active ingredient paclobutrazol. “Previously, Piccolo applications in Canada were limited to container grown bedding plants and plugs. Now, Canadian growers can obtain the same outstanding growth control in their poinsettias and pot chrysanthemums.” Forney added that the PGR can be applied as a spray or drench. By reducing […]

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March 2, 2012

Mobile App For Calculating Plant Growth Regulator Applications Launched

The University of New Hampshire Cooperative Extension announced the launch of its first mobile app called “PGR Mix Master” on February 29, 2012. PGR Mix Master was developed at the University of New Hampshire with the support from Fine Americas, Inc and is available in Android, Blackberry and iPhone formats. The free application was created to be an easy-to-use tool to assist greenhouse personnel in calculating correct dilutions for plant growth regulators. PGR Mix Master is an extension of the popular web calculator PGRCALC that can be used on the home screen of a smartphone and is optimized for mobile devices.  PGR Mix Master is capable of calculating dilutions for all PGRs registered for greenhouse use.  The app can be downloaded by searching iTunes and the Android Market for Apple and Android devices, respectively, or visiting www.nhfloriculture.com for the Blackberry version.

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February 15, 2012

OHP To Show Off Plant Growth Regulators At California Spring Trials 2012

OHP has announced its participation in the California Spring Trials from March 23-31, 2012. Returning to the trials again this year, OHP will showcase the results of its plant growth regulators (PGR) on perennials and annuals such as lantana, geranium, petunia, calibrachoa, sedum and pennisetum (grass) at American Takii in Salinas. In addition, OHP will demonstrate the effect of its PGR Augeo on no-pinch poinsettias. OHP Senior Technical Manager Dave Barcel will coordinate the display, evaluating the performance of the OHP’s PGRs B-Nine, Cycocel, Paczol and Augeo on the many quality varieties of American Takii. “We feel very privileged to be able to be a small part of the event,” notes Barcel, who will be participating in his 17th Spring Trial. “American Takii has graciously agreed to provide us an expanded demonstration area for this year’s trials. They are a great host and destination spot.” The annual event draws attendees […]

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January 6, 2012

Height Control For Easter Lilies

Flurprimidol drenches have been shown to successfully control height of oriental lilies and Dutch bulbs such as hyacinth, narcissus and tulips, but there is no data that shows how effective flurprimidol drenches are on Easter lilies. Researchers decided to find out.

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December 21, 2011

PGR Highlights: Uniconazole

How to use uniconazole PGR products, including safety information, keys for foliar application and substrate drenches and rates for different genera.

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November 21, 2011

PGR Highlights: Daminozide

By using Daminozide plant growth regulators, growers can retard growth for one to three weeks following treatment. Watch this episode to get more details on keys for application to help you get the most out of your foliar spray application.

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November 21, 2011

PGR Highlights: Chlormequat Chloride

See all the details on the use of chlormequat chloride, including target crops and keys to foliar and drench applications.

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November 21, 2011

PGR Highlights: Paclobutrazol

What are the best uses for paclobutrazol plant growth regulators? Watch this episode of FloriCAST for safety advice, keys to application and how paclobutrazol products work to control height.

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November 21, 2011

PGR Highlights: Ancymidol

See all the details on the use of ancymidol to control height, including how it works and keys to foliar and drench applications.

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