Florida Invasive Species Impact on Agriculture: Identification and Response

Florida's agricultural sector faces ongoing economic and ecological pressure from invasive species — organisms introduced outside their native range that establish, spread, and cause measurable harm to crops, livestock operations, and natural resource systems. This page covers the major invasive species affecting Florida agriculture, the regulatory and inspection frameworks governing detection and response, the scenarios in which producers are most likely to encounter these threats, and the decision boundaries that determine when federal, state, or local authority applies. Understanding these boundaries is essential for producers operating across Florida's diverse agricultural landscape.

Definition and Scope

An invasive species, as defined by Executive Order 13112 (1999, updated by EO 13751 in 2016), is a non-native organism whose introduction causes or is likely to cause economic harm, environmental harm, or harm to human health. In the agricultural context, the Florida Department of Agriculture and Consumer Services (FDACS) applies this framework through Chapter 581, Florida Statutes, which governs plant pest regulation, and Chapter 585, which addresses animal diseases and pest species.

Florida's geography — a peninsula with subtropical and tropical climate zones, major international ports, and intensive horticultural trade — creates conditions that accelerate invasive species introduction. The state maintains one of the most active invasive species surveillance programs in the country, coordinated between FDACS, the United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS), and the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS).

Scope and coverage limitations: This page addresses invasive species as they affect agricultural production within Florida's state boundaries. Federal quarantine designations and interstate movement restrictions issued by USDA APHIS apply concurrently with Florida law and are not superseded by state action. Marine invasive species affecting aquaculture operations fall under a separate jurisdictional framework involving the Florida Fish and Wildlife Conservation Commission (FWC) and NOAA Fisheries. Pest and disease management concepts that overlap with invasive species response are addressed separately at Florida Agricultural Pest and Disease Management.

How It Works

The detection-to-response pipeline for invasive species in Florida agriculture operates through four discrete phases:

1. Detection and reporting — Growers, crop scouts, extension agents, and FDACS inspectors identify suspect organisms in the field or at points of entry. FDACS operates the Division of Plant Industry (DPI), which maintains a network of inspectors authorized under Section 570.07, Florida Statutes, to survey nurseries, farms, and packing facilities.

2. Identification and confirmation — Suspect specimens are submitted to DPI's Bureau of Entomology, Nematology, and Plant Pathology or to USDA APHIS for laboratory confirmation. Turnaround targets vary by pest priority classification — federally listed actionable pests typically require confirmation within 72 hours.

3. Quarantine and regulatory response — Upon confirmed detection, FDACS or USDA APHIS may issue a quarantine order under Section 581.101, Florida Statutes, or a federal domestic quarantine under 7 CFR Part 301. Quarantine orders restrict movement of regulated articles — including host plants, soil, and equipment — within defined perimeters.

4. Eradication or management — Depending on the pest's establishment level, the response shifts between attempted eradication (feasible when populations remain localized) and managed suppression (applied when eradication is no longer practicable). FDACS and USDA APHIS jointly fund eradication programs through cost-sharing agreements under the Farm Bill's Plant Protection Act authority.

The broader regulatory context for Florida agriculture shapes how these phases interact with federal mandates and Florida's administrative code.

Common Scenarios

Florida agriculture encounters invasive species pressure across commodity sectors. The following represent the highest-consequence pest categories currently subject to active state or federal programs:

Citrus: - Diaphorina citri (Asian citrus psyllid) vectors Huanglongbing (HLB or citrus greening), a bacterial disease that has reduced Florida's citrus production by more than 75% from its peak (FDACS Citrus Summary 2022–23). HLB has no cure; the regulatory response centers on psyllid suppression and infected tree removal. - Phyllosticta citricarpa (citrus black spot) is a federally regulated fungal pathogen triggering export restrictions under USDA APHIS quarantine orders.

Nursery and greenhouse: - Toona ciliata (Australian red cedar) and Ardisia crenata (coral ardisia) are listed as prohibited plants under FDACS Rule 5B-57.007, restricting their sale, transport, and cultivation. - Ralstonia solanacearum race 3 biovar 2 (brown rot of potato), a select agent under the Agricultural Bioterrorism Protection Act, triggers mandatory federal reporting upon detection.

Row crops and vegetables: - The Thrips palmi (melon thrips) affects pepper, cucumber, and watermelon crops across South Florida growing regions. FDACS maintains a surveillance protocol specifically for this species in Miami-Dade and Palm Beach counties.

Livestock and aquaculture: - The New World screwworm (Cochliomyia hominivorax) remains a federally significant threat; a 2016 incursion in Monroe County prompted a joint USDA APHIS and FDACS eradication response using sterile insect technique over approximately 130,000 acres.

Decision Boundaries

The appropriate regulatory pathway depends on two primary classification axes: federal vs. state jurisdiction and eradication vs. management threshold.

Federal vs. state jurisdiction: - Pests listed on the USDA APHIS Federal Select Agent Program or under a domestic quarantine (7 CFR Part 301) fall under mandatory federal authority. State agencies act as cooperators, not lead agencies. - Pests listed only in FDACS Rule Chapter 5B or Florida Statutes Chapter 581 are managed under state authority, though USDA APHIS may provide technical or financial assistance.

Eradication vs. management: - FDACS and USDA APHIS apply the concept of pest establishment level to determine feasibility. A population confined to a single county with no wild host recruitment typically qualifies for eradication protocol. A population present across 10 or more counties with established wild host reservoirs typically shifts to area-wide integrated pest management (IPM), as defined by USDA APHIS's Integrated Pest Management Program framework. - Producer obligations differ materially between these designations. Under eradication protocol, growers may be required to destroy regulated host material with or without compensation depending on cost-share agreements in effect. Under management protocol, compliance involves recordkeeping, restricted-use pesticide application, and movement documentation.

Producers navigating these determinations — particularly those operating nurseries, citrus groves, or multi-commodity operations — will find the full overview of Florida's agricultural industry structure at /index.

References

• Executive Order 13112 (1999, updated by EO 13751 in 2016)
• FDACS
• United States Department of Agriculture Animal and Plant Health Inspection Service (USDA APHIS)
• University of Florida Institute of Food and Agricultural Sciences (UF/IFAS)
• Bureau of Entomology, Nematology, and Plant Pathology
• FDACS Citrus Summary 2022–23
• Federal Select Agent Program
• Integrated Pest Management Program framework