Unveiling Vascular Streak Dieback: Insights, Surveys, and Solutions

Jennifer Gray • April 16, 2024

This webinar dives into the emerging nursery problem of Vascular Streak Dieback (VSD). In this session, experts will provide a comprehensive overview, sharing insights gleaned from surveys, research updates, and practical management strategies. From understanding the timeline of recognition to discussing the fungus associated with VSD, its range of hosts, and symptoms, our speakers will cover it all. Delve into the latest research findings on identifying causal agents, fungicide efficacy trials, and cultivar screening. Whether you're a nursery owner, researcher, or simply interested in plant health, this webinar offers valuable knowledge and a platform for addressing your queries. Join us as we tackle VSD head-on and explore effective management approaches to safeguard woody ornamentals.

VSD: Introduction to an emerging nursery problem

Discover the timeline of VSD in North America, the fungus associated with VSD, the range of plant hosts on which it has been found, internal and external symptoms, and look-alike diseases.

Devin Bily



VSD of Woody Ornamentals in Virginia

The presentation will discuss the results of the two-year survey conducted by VDACS, and symptoms associated with plants that tested positive for C. theobromae.

Katy Kilbourne


Multi-State VSD survey

The Tennessee Department of Agriculture has partnered with several states for a cooperative VSD nursery and environs survey. Identification of this pest within the plant trade assists with keeping populations geographically confined and determining population density and host range.

Fulya Baysal-Gurel


VSD Research Update

VSD is an emerging is an emerging threat to the woody ornamental industry. This session addresses the research updates regarding identification of the causal agent/s of the VSD, fungicide efficacy trials and redbud cultivar screening. Finally, best management practices for VSD will be discussed


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By Nina Shishkoff, Plant Pathologist with USDA-ARS February 20, 2025
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By Jennifer Gray November 19, 2024
COLUMBUS, OH – The Horticultural Research Institute (HRI) is proud to announce Dante Filadoro as the 2024 recipient of the Timothy S. and Palmer W. "Bill" Bigelow, Jr. Scholarship. Established in 1988 by the Bigelow family, this scholarship aims to support students from New England pursuing careers in horticulture, honoring the memory of Timothy Bigelow and celebrating the legacy of Palmer W. "Bill" Bigelow.
It is a blurry picture of a green background.
By Jennifer Gray November 12, 2024
COLUMBUS, OH – (November 12, 2024) The Horticultural Research Institute (HRI) announces the opening of the HRI Leadership Academy Class of 2026 application window. This one-year leadership program is designed to develop the skills green industry leaders need to perform better, grow faster, and prepare for the future. “As we enter the fourth year of the HRI Leadership Academy, this program is driving the development of the next generation of leaders in the green industry. Our commitment is to empower passionate, dedicated individuals ready to lead the future of horticulture, and we can’t wait to welcome those who want to make a lasting impact,” said Leigh Geschwill, HRI Board President.  The HRI Leadership Academy offers horticulture leaders a unique opportunity to enhance their leadership skills, broaden their horticultural knowledge, and connect with professionals across the industry. The academy is designed to give participants a comprehensive approach to leadership development through in-person training sessions and online classes and meetings. Applications will be evaluated on demonstrated leadership qualities, past evidence of or estimated future potential for contribution to the green industry, ability to consider the broader interests of the community, the applicant’s character and ability to grow because of this experience, and personal and employer commitment to the program. Preference will be given to candidates with at least five years of leadership experience and seven years of relevant industry work experience. “The HRI Leadership Academy is a critical investment in shaping our industry’s future. Graduates of the academy develop enhanced leadership skills to grow their companies, drive innovation, and strengthen the entire industry,” said Ken Fisher, AmericanHort President and CEO. “By cultivating leaders who are equipped to face the challenges of tomorrow, we are ensuring the long-term success of individual businesses, our communities, and the industry as a whole.” Application Timeline: Application Window: Open now until February 7, 2025 Interviews: March and April 2025 Class Selection and Notification: May 2025 Class Announcement: Cultivate'25, July 12-15, 2025, in Columbus, OH There is no fee to apply and AmericanHort covers program tuition. Applications should be submitted through the HRI Leadership Academy website during the application window. All applicants will be considered, and successful candidates will be chosen based on their commitment to the industry, leadership potential, and potential to contribute to the horticultural community. For more information about the HRI Leadership Academy and to download a program brochure, please visit HRILeadershipAcademy.org . ### About the Horticultural Research Institute (HRI) The Horticultural Research Institute (HRI), founded in 1962, has provided more than $9.5 million in funds to research projects covering a broad range of production, environmental, and business issues important to the green industry. Over $19 million is committed to the endowment by individuals, corporations, and associations. For more information about HRI, its grant-funded research, or programming, visit For more information about the HRI Leadership Academy and to download a program brochure, please visit HRILeadershipAcademy.org . About AmericanHort Green industry businesses perform better, grow faster, and prepare for the future as a member of AmericanHort, the green industry’s leading association. With a rich history of serving horticultural professionals, AmericanHort supports 20,000 members and affiliated businesses that include breeders, greenhouse and nursery growers, garden retailers, distributors, interior and exterior landscape professionals, florists, students, educators, researchers, manufacturers, and all of those who are part of the industry market chain. The horticulture industry's production, wholesale, retail, and landscape service components have annual sales of $346 billion, and sustain over 2.3 million full- and part-time jobs. AmericanHort works to impact the growth, performance, and successful future for the industry through advocacy, research, education, and advancing industry standards.
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