Research Institute

The Horticultural Research Institute proudly supports scientific research and horticultural students for the advancement of the industry. HRI was established by industry leaders on the premise that no one could better direct needed research to advance horticulture than the very people who work in it, day in and day out.

Jill Calabro, Ph.D. March 27 2018

An article in the new issue of the Journal of Environmental Horticulture (JEH) summarizes studies conducted to determine the sensitivity of Calonectria pseudonaviculata, the causal agent of boxwood blight, to select fungicides.
Boxwood blight has been known to b...

Craig Regelbrugge March 27 2018

AmericanHort enthusiastically welcomed Agriculture Secretary Sonny Purdue’s announcement that the U.S. Department of Agriculture (USDA) is allocating almost $70 million in new funding for invasive plant pests and disease projects. The funding is intended to prevent the introduction or spread of pests that threaten U.S. agriculture and the environment and to sustain the infrastructure nece...

Jill Calabro, Ph.D. February 27 2018

The Horticultural Research Institute (HRI), the foundation of AmericanHort, has announced the portfolio of research projects receiving funding in 2018. $232,000 will be provided to 10 projects to investigate solutions in the areas of horticultural production, pest management, environmental stewardship, and business and marketing.

Jill Calabro, Ph.D. February 27 2018

Your input is needed!
The Economic Committee of the National Initiative for Consumer Horticulture (NICH) is seeking insight into benchmarks and tools used by our industry to manage their businesses – basically what numbers are important to our industry and are there any gaps.
By understanding the economic data, NICH will identify ways to increase ...

Jill Calabro, Ph.D. January 30 2018

A ban on dicamba herbicide applications in Arkansas was approved recently in an effort to mitigate damage to non-target plants. The new regulation prevents dicamba applications from April 16 through October 31, but exempts applications to turf, ornamentals, some forests, pastures, and rangelands. The Arkansas Legislative Council will revisit this issue for the 2019 growing season.

Jill Calabro, Ph.D. January 16 2018

The controversy over California’s “cancer-causing” label requirement for glyphosate is intensifying.
Attorneys general from eleven other states filed a ‘friend of the court’ brief in the challenge of the State of California’s decision to label glyphosate as a carcinogen, arguing that this mandate forces businesses to state false and misle...

Jill Calabro, Ph.D. January 16 2018

A newly published research article compared the uptake and dissipation of two neonicotinoid residues in nectar and foliage of Ilex and Clethra. The research was led by Dr. Dan Potter, University of Kentucky, and partially funded by the Horticultural Research Institute (HRI) through the Pollinator Stewardship Initiative.
The two neonicotinoids evaluated wer...

Jill Calabro, Ph.D. January 03 2018

Plant pathologists and the green industry were treated to a trifecta of disease headlines this holiday season.
First, the Tennessee Department of Agriculture confirmed that a new boxwood blight quarantine will go into effect February 4, 2018. The new quarantine includes all material currently known to transmit the disease, including Buxus species, Sarcococca

Jill Calabro, Ph.D. December 19 2017

The collaboration of researchers focused on combatting rose rosette disease (RRD) recently convened virtually to summarize key recent findings. AmericanHort and HRI participated. Some of the key updates reported include:

  • Diagnostics of the virus and the mites that transmit the disease both continue to be high priorities for the group. Ongoing efforts seek to develop fi...

Jennifer Gray December 05 2017

The AmericanHort and HRI research staff were recently invited to meet with scientists at the USDA Agricultural Research Station in Wooster, Ohio to learn more about the collaborative work taking place there. The trip included robust discussions with five researchers, conversations with multiple post-doctoral and graduate students, visits to several labs, and tours of three nurseries.

Ralstonia solancearum race 3 biovar 2 (R3B2), a federal quarantine pest, was recently confirmed in a single geranium variety in a greenhouse in Michigan, the first confirmed case in the US since 2004. Diseased geraniums planted in the landscape can potentially infect other plants, including tomatoes, potatoes, peppers, and eggplant, and must be destroyed.
Since the detection was con...

A group of House lawmakers introduced a bipartisan agricultural labor reform bill on October 30. How does the bill address the current H-2A program? What options are available for existing workers without proper immigration status? What about enforcement provisions? And, where might there be room for improvement as the process advances?

This stacked panel of experts will plunge into the current and potential application of exciting new technologies showing promise in automating and innovating the management of nursery stock, and other environments including arboretums and forest stands. New technologies explored during this seminar include drone-based observation and sampling, canopy robotics, and a variety of radio-frequen...