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Citrus Diseases

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Citrus-producing regions in the United States are at high risk for the introduction and

establishment of exotic pests and diseases because of their proximity to

international air and maritime ports and favorable climatic conditions.

Five exotic citrus pests and diseases are established in the United States and have

the potential to harm every acre of citrus if they were allowed to spread. They
include huanglongbing, also known as citrus greening; Asian citrus psyllid; citrus

canker; citrus black spot; and sweet orange scab.

Citrus Black Spot 

Citrus Canker 

Citrus Greening 

Sweet Orange Scab 

Report Signs of Citrus Disease
If you think you've seen signs of this disease or pest, immediately report it by

completing our online form.

Report Form (English)

Report Form (Spanish)

Controlling Citrus Disease

APHIS' Response

We collaborate with State departments of agriculture and the citrus industry to

safeguard the American citrus industry. The goals of our Citrus Health Response

Program (CHRP) are to sustain the U.S. citrus industry, maintain grower access to

export markets, and safeguard citrus-producing areas against exotic citrus diseases

and pests.

To achieve these goals, we perform multi-pest surveys in commercial and residential

citrus areas to identify early infestations of exotic citrus pests for eradication, and to

ensure that quarantine boundaries accurately reflect infested areas. CHRP protects

the American consumer’s access to domestically produced citrus fruit and nursery

trees with regulations that limit the spread of pests to uninfested areas.

Federal Quarantine Descriptions Table

Interactive Citrus Federal Quarantine Map

Regulated Articles Table

Citrus Nursery Stock Protocol

The citrus nursery stock protocol provides standards and requirements for the

interstate movement of citrus nursery stock from areas quarantined for citrus

canker, huanglongbing, and/or Asian citrus psyllid. All interstate movement of citrus

nursery stock is prohibited unless the conditions in the protocol are met.

The survey protocol for citrus nursery stock describes the rates of inspection,

sampling, and testing required by the nursery stock protocol.

Survey Protocol for Citrus Nursery Stock Protocol (128.51 KB)

State Citrus Contacts
Alabama

Jeff Head, State Plant Health Director

Phone: 662-323-1291

Email: jeffery.l.head@usda.gov

Chad Wetzel, Gulf Coast Supervisor

Phone: 251-277-1532

Email: chad.w.wetzel@usda.gov

Chalin Street, Plant Health Safeguarding Specialist Gulf Coast 

Phone: 251-331-3757

Email: chalin.b.street@usda.gov

Arizona

Gary Russell, State Operations Coordinator

Phone: 602-431-3202

Email: gary.russell@usda.gov

Anthony Bocchino, Supervisory PPQ Field Operations

Phone: 602-431-3222

Email: anthony.j.bocchino@usda.gov

Michael Wallace, State Plant Health Director

Phone: 602-431-3201

Email: michael.d.wallace@usda.gov

California 

Norm Mullaly, State Operations Coordinator

Phone:  279-300-5200 

Email: norm.mullaly@usda.gov

Helene Wright, State Plant Health Director 

Phone: 279-300-5200 

Email: helene.r.wright@usda.gov
Florida

Paul Mears, Florida Citrus Health Response Program Coordinator 

Phone: 352-313-3046

Email: paul.mears@usda.gov

James Walker, Acting State Plant Health Director

Phone: 352-313-3045

Email: james.w.walker@usda.gov

Michael Mulligan, Acting Assistant State Plant Health Director

Phone: 352-313-3047

Email: michael.j.mulligan@usda.gov

Georgia

Philip A. Bailey, Supervisory PPQ Officer

Phone: 770-860-4025

Email: philip.a.bailey@usda.gov

Carl Lightfoot, State Plant Health Director

Phone: 404-260-7840

Email: :carl.w.lightfoot@usda.gov

Guam and Hawaii

Vernon Harrington, State Plant Health Director

Phone: 808-838-2780

Email: vernon.harrington@usda.gov

Louisiana

Joe J. Bravata II, State Plant Health Director

Phone: 225-298-5425

Email: joseph.j.bravata@usda.gov

Regina Whitfield, Citrus Health Response Program Coordinator 

Phone: 504-487-0160

Email: regina.whitfield@usda.gov
Mississippi

Jeff Head, State Plant Health Director

Phone: 662-323-1291

Email: jeffery.l.head@usda.gov

Chad Wetzel, Gulf Coast Supervisor

Phone: 251-277-1532

Email: chad.w.wetzel@usda.gov

Chalin Street, Plant Health Safeguarding Specialist Gulf Coast 

Phone: 251-331-3757

Email: chalin.b.street@usda.gov

Nevada

Peter Rockermann, State Plant Health Director

Phone: 775-851-8818

Email: peter.rockermann@usda.gov

Puerto Rico and U.S. Virgin Islands

Leyinska Wiscovitch, State Plant Health Director

Phone: 787-919-0585

Email: leyinska.wiscovitch@usda.gov

South Carolina 

Kimberly Dean, State Plant Health Director

Phone: 843-852-8234

Email: kimberly.dean@usda.gov

Texas

Ruben Guerra, Assistant State Plant Health Director

Phone: 512-916-5241 

Email: ruben.r.guerra@usda.gov
Guadalupe Gracia, Area Supervisor

Phone: 956-421-4041

Email: guadalupe.gracia@usda.gov

Mayra Arredondo, Officer in Charge CHRP

Phone: 956-205-7700

Email: mayra.j.arredondo@usda.gov

Assistant National Policy Manager

Dan Murphy, Assistant National Policy Manager

Phone: 775-221-9237

Email: daniel.m.murphy@usda.gov

National Policy Manager

Abby Stilwell, Acting National Policy Manager

Phone: 919-323-6296

Email: abby.r.stilwell@usda.gov

How You Can Help 

Visit our Citrus Story Map to learn more about how you can help prevent the spread

of citrus diseases as a citrus buyer, grower, or member of the general public.

Learn More