HLB-Resistant Citrus Rootstocks: USDA Seeks Public Input—What It Means for Nurseries
- 4 hours ago
- 2 min read
The citrus industry continues to search for durable solutions to Huanglongbing (HLB), and a recent development at the federal level is worth close attention from nursery operators. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) is currently reviewing a petition to deregulate a genetically engineered Carrizo citrange rootstock (CarriCea) developed for HLB resistance. Public comments are open through April 13, 2026.
This is not yet an approved product, but it represents an important step in the regulatory pathway that could eventually lead to the commercialization of disease-resistant citrus rootstocks.
What is happening now?
The petition, submitted by Soilcea, LLC, requests that APHIS grant “nonregulated status” to this rootstock under 7 CFR Part 340. This designation means that, if approved, the plant would no longer be regulated as a genetically engineered organism under APHIS plant pest authorities, allowing for broader cultivation and interstate movement.
As part of its review, APHIS has prepared a draft Plant Pest Risk Assessment (PPRA), comparing the engineered rootstock to its conventional counterpart. The preliminary conclusion is that the modified plant is unlikely to pose an increased plant pest risk.
Following the public comment period, APHIS will evaluate submitted input and issue a final determination.
Genetic engineering vs. gene editing: what’s the difference?
As new technologies emerge, it is important to distinguish between commonly used terms. Genetic engineering (often referred to as GMO) involves introducing new DNA into a plant. In contrast, gene editing technologies such as CRISPR modify the plant’s existing DNA without necessarily adding foreign genetic material.
The Carrizo rootstock under review falls under the genetic engineering category. While both approaches are being explored in citrus improvement, they may be treated differently in regulatory frameworks and public perception.
Why this matters to nurseries
Although this rootstock is still under review, its potential approval signals a shift that nursery operators should be prepared for.
Future plant material: HLB-resistant rootstocks could influence propagation demand and variety portfolios
Regulatory implications: Potential updates to certification programs and interstate movement requirements
Operational adjustments: Increased emphasis on documentation, traceability, and compliance
Customer communication: Growing need to clearly explain plant types (GMO vs. gene-edited) to buyers
More broadly, this development highlights the intersection of plant innovation and regulatory policy—both critical to nursery operations.
📌 Take Action: Submit Your Comments to USDA APHIS
APHIS is actively seeking input from stakeholders, including nurseries.
🗓 Deadline: April 13, 2026
Why this matters: This is a key opportunity for nursery operators to:
Share real-world operational considerations
Highlight certification and compliance challenges
Inform future regulatory decisions affecting your business
Benefits to the Industry
Year 2 aims to deliver a science‑based response to HLB pressures, compliance challenges and misinformation by elevating clean‑plant standards, strengthening APHIS‑aligned practices and supporting resilient, compliant nursery operations nationwide. Growers benefit from a stronger educational network; academics gain a platform for research collaboration; and regulators see a unified industry voice advocating for pragmatic policies and clear protocols
Get involved
Join NCNA to access resources and shape priorities.
Attend the virtual and in-person events.
Share your needs so the Steering Board can target content and policy dialogues where they matter.
Genetic engineering vs. gene editing image created by Gemini 2026
Comments