Increased Testing Demand
As global regulations tighten, U.S. seed exporters face increased testing demands for Curtobacterium flaccumfaciens pv. flaccumfaciens (Cff), the bacterium responsible for bacterial wilt in key legume crops, including dry beans, garden beans, soybeans, and cowpeas. Some sources still list Cff under its former name, Corynebacterium flaccumfaciens, but one thing remains clear—ensuring seed health through reliable testing is more critical than ever.
Why Is Testing Increasing?
In 2019, Cff was added to the European Union (EU) Quarantine Pest List, requiring strict phytosanitary controls under the EU Plant Health Law. Recently, outbreaks in Switzerland and the Netherlands were linked to U.S. bean seed imports, prompting stricter seed testing protocols across the EU.
What This Means for Exporters
To prevent costly shipping delays or rejections, seed exporters sending shipments to the EU are strongly encouraged to test before export. Proposed EU testing requirements will apply to:
- Glycine max (soybean)
- Phaseolus coccineus (runner bean)
- Phaseolus lunatus (lima bean)
- Phaseolus vulgaris (common bean)
- Vicia faba (broad bean)
- Vigna angularis (adzuki bean)
- Vigna mungo (black gram)
- Vigna radiata (mung bean)
- Vigna unguiculata (cowpea)
Fast and Reliable Testing at Iowa State University
At Iowa State University’s Seed Health Lab, we offer Cff testing that aligns with the EU and National Seed Health System protocols, providing fast and accurate results to help exporters meet international requirements without unnecessary delays. Our process includes:
- 5,000-seed testing in subsets of 1,000 using dilution plating on semi-selective medium
- 10–12 day turnaround (incubation period included)
- PCR analysis available (+1–2 days if suspect colonies are detected)
- Pathogenicity testing available upon request for an extra fee
Dr. Charlie Block, Seed Health Testing Coordinator, emphasizes Iowa State University’s dedication to fast and accurate Cff testing:
"At the Iowa State University Seed Lab, we follow a protocol that meets international standards. With one of the fastest turnaround times in the U.S., our expert team and efficient processes provide reliable results, helping exporters stay compliant and avoid unnecessary delays."
Plan Ahead for Hassle-Free Exports
To ensure smooth export operations, schedule testing well in advance to meet shipping deadlines and avoid potential setbacks.
For more information or to arrange testing, contact the Iowa State University Seed Lab at seedlab@iastate.edu today. By staying proactive and compliant with international standards, U.S. seed exporters can navigate regulatory challenges with confidence and maintain strong global trade relationships.