Hydroponic farming is a rapidly growing method for producing fresh vegetables, especially lettuce

The University of Connecticut received a $960,000 Project Grant from the U.S. Department of Agriculture National Institute of Food and Agriculture (NIFA) under the Urban, Indoor, and Other Emerging Agricultural Production Research, Education, and Extension Initiative (CFDA 10.333) effective September 30, 2025, through September 29, 2029. The award supports research and extension activities addressing Pythium root rot, a major disease challenge in hydroponic lettuce and vegetable production systems. The project will track Pythium occurrence patterns across commercial greenhouses in the Northeast and Midwest, develop a rapid diagnostic test enabling quick pathogen detection by growers and diagnostic laboratories, establish critical disease thresholds to guide intervention timing, and test both commercial and naturally occurring beneficial microbes to protect plants from root rot while optimizing application methods for hydroponic systems.

The award includes an extension and outreach component designed to translate research findings into practical guidance for growers. The University of Connecticut will deliver workshops, training programs, direct grower consultations, fact sheets, trade magazine articles, and online resources to disseminate project results. Additionally, the award includes a sub-grant to the Agricultural Research Service Midwest Area ($960,000 obligated June 3, 2026) focused on improving the use of beneficial microbial inoculants in hydroponic production for enhanced plant disease management. These combined efforts aim to reduce crop losses, improve production efficiency, and enhance the long-term sustainability of hydroponic farming operations.

However, one of the biggest challenges facing growers is pythium root ROT, a disease that damages roots, reduces yield, and causes significant crop losses. Current tools to detect and manage this disease are limited, and growers often lack clear guidance on when and how to intervene. This project will develop practical solutions to help growers prevent and manage pythium root ROT. First, we will track where and when pythium occurs in commercial greenhouses in the northeast and midwest. We will also develop a rapid diagnostic test that allows growers and diagnostic labs to detect the pathogen quickly, making IT easier to respond before losses occur. By determining critical thresholds of pythium that lead to disease, we will help growers know when IT is most important to take action. Second, we will test both commercial and naturally occurring beneficial microbes that may protect plants from root ROT. These microbes could provide growers with new options to reduce losses and improve root health. We will also learn how application methods and timing affect the ability of these microbes to survive in hydroponic systems and protect crops. Finally, we will work directly with growers to share what we learn. We will offer workshops, training programs, and grower consultations, supported by fact sheets, trade magazine articles, and online resources. Growers who participate will also have the opportunity to test their own systems for pythium and beneficial microbes, gaining practical insights into the biology of their production systems. Together, these efforts will reduce crop losses, improve production efficiency, and help ensure the long-term sustainability of hydroponic farming.