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. 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.

Jill Calabro, Ph.D. December 05 2017

A research report to be released soon points to a connection between fungicide usage and prevalence of Nosema, a fungal pathogen, in bumblebees. The study is unique in that it is the first to consider multiple factors on a landscape scale associated with bumblebee decline. In total, 24 such variables were factored into the analysis and included things such as habitat, land use, and pesticide us...

Jill Calabro, Ph.D. November 21 2017

Your input is very important to researchers! A research collaboration led by Dr. David Byrne, Texas A&M, will be submitting a proposal to conduct research on the use of remote sensing to assess plant traits.
These researchers would like to better gauge the interest of the industry in using remote sensor technology for monitoring purposes (such as for abiotic and/or dise...

Jill Calabro, Ph.D. October 24 2017

Pollinator health remains a high priority for horticulture. A couple of key recent meetings delved into the latest research and stewardship developments and plans for the future.
The second Protecting Pollinators in Urban Landscapes conference recently convened in Traverse City, MI. The meeting was organized by researchers at Michigan State University and North Carolina Sta...

Jill Calabro, Ph.D. October 10 2017

Boxwood producers and landscape managers:  your help is needed to direct future research! Please consider completing a short, less than five-minute survey to help identify attractive groundcovers as potential boxwood companion crops.
Dr. Chuan Hong, Virginia Tech, and his team ...

Jill Calabro, Ph.D. September 12 2017

The Whitefly biotype Q Task Force (WTF-Q) coordination council met recently in Florida to discuss future direction. The coordination council is made up of two representatives each from industry, the regulatory community, and the research community, as well as a USDA-APHIS coordinator. AmericanHort and the Horticultural Research Institute (HRI) co-chair the industry part of the coordination coun...