The WERA-20 Meeting was hosted in Raleigh, North Carolina September 8-10, 2025. This annual meeting focuses on Management of Diseases Caused by Systemic Pathogens in Temperate and Sub-Tropical Fruit Crops and Woody Ornamentals. WERA-20 participants include several National Clean Plant Network members, and this year the meeting featured a special full-day session focused on the Network as a whole. The goal of this NCPN Cooperators session was to feature the progress and techni

As the Coordinator for the National Clean Plant Network program, I would like to share some program updates for the Network. First, I am pleased to announce an increase in NPCN program funding. The Plant Protection Act Section 7721 program recently received an increase in funding from $75 million to $90 million. PPA 7721 funds projects through the Plant Pest and Disease Management and Disaster Prevention Program and the National Clean Plant Network. Starting in FY 2026, the N

Over the last several years, National Clean Plant Network Centers and crop committees have discussed the need for better tools to manage the data behind virus testing and plant management. NCPN Centers vary greatly in size and scope and currently there is not a standardized data management approach across NCPN member Centers. Frequently testing and collection records are kept in Excel spreadsheets, but spreadsheets are not efficient and are limited in the ability to link data

The exchange of grapevine propagation material across geographic and regulatory boundaries increases the diversity of cultivars and...

There are currently four NCPN-Berries Clean Plant Centers in the U.S. Programs in Arkansas, North Carolina, Oregon, and California...

Two major viral disease threats to the sustainability and profitability of the global wine grape industry are grapevine leafroll disease...

In 1932, Citrus was the first crop in which a disease was associated with a virus (Citrus psorosis virus). This led to the establishment...

Given the size of the CPCNW’s tree fruit program, tightening up their workflow process was the key to releasing more plants in the last...

The NCPN-Hop program at Clean Plant Center Northwest has dramatically increased throughput and the production of clean hop plants through...

EDNA (Electronic Probe Diagnostic Nucleic Acid Analysis) is a powerful new tool that helps protect citrus crops from diseases. It uses...

Several NCPN Clean Plant Centers have been authorized by USDA APHIS to hold Controlled Access Permits, which means they can accept...

International movement of plant material is regulated by national plant protection organizations, and depends on the accurate...

This graphic provides a simplified description of the process that plant material is subjected to before it is deemed “clean” by NCPN...

Citrus is the number one fruit crop in Louisiana. There are several diseases that are extremely detrimental to this industry, namely...

The National Clonal Germplasm Repository for Citrus & Date (NCGRCD) in Riverside, California is currently renovating its existing...

Despite being the only citrus-producing state with no instances of huanglongbing, the Asian Citrus Psyllid is found within the state....

The Alabama Clean Citrus Program focuses on providing pathogen-free cold-hardy citrus propagules--primarily satsuma--for in-state...

Huanglongbing (HLB) or “citrus greening” was first detected in Puerto Rico in 2009; by 2011 it had spread throughout the island. The...

The Texas Citrus Clean Plant Program has grown significantly and expanded in the last several years. Prior to 2013, the Citrus Center...

The Florida Citrus Clean Plant Center is situated within the Bureau of Budwood Registration as part of the Florida Department of...