Mexican Fruit Fly

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PestControlBasics Editorial Team

Reviewed by Derek Giordano · Updated 2026

Illustrated identification guide — PestControlBasics.com

🔍 Identification

Adults: 10-12mm; yellow-orange with dark wing bands and distinctive W-shape on wings. Females have a long ovipositor. Maggots: cream-colored, legless, in fruit. Hosts: mango, grapefruit, orange, peach, apple, pear, and many other fruits. Damage: larvae inside fruit causing premature drop and rot; cosmetic damage visible only when fruit is cut open.

🧬 Biology & Behavior

Mexican fruit fly is a federally regulated quarantine pest — its establishment in the US triggers USDA APHIS detection and eradication programs. During active detections in Texas, California, and Florida, USDA may require homeowners in the quarantine area to allow fruit removal from their trees. Moving any host fruit out of a quarantine area is federally illegal. Detections occur periodically from infested fruit crossing the border.

⚠️ Damage & Health Risk

Economic losses in commercial fruit production; quarantine restrictions on fruit movement; required fruit removal from homeowner trees during active detection; potential for establishment if not eradicated.

🔧 DIY Treatment

Homeowner: do not move any fruit out of a declared quarantine area. Report suspicious fly damage (multiple larvae in fruit) to USDA APHIS or your county agricultural commissioner. In border counties: pick and bag all fallen fruit promptly — do not leave on the ground. USDA handles eradication through bait sprays and fruit removal.

👷 When to Call a Pro

USDA APHIS coordinates eradication with malathion bait spray programs and fruit stripping operations in quarantine zones.

❓ FAQ

Can I move fruit from my tree during a Mexican fruit fly quarantine?

No — moving host fruit out of a declared quarantine zone is a federal violation. During active quarantine detections, USDA may require fruit removal from your trees. Cooperating with these programs is legally required and essential for eradication. Contact your county agricultural commissioner for current quarantine status in your area.

How do I know if my backyard fruit has Mexican fruit fly?

Premature fruit drop; larvae (cream maggots) when you cut the fruit open; multiple entry holes in the fruit skin. Mexican fruit fly larvae in mango and citrus from border region fruit are the most common interceptions. Report any suspected infested fruit to USDA APHIS (1-800-877-3835) or your county agricultural commissioner.

🪰 Mexican Fruit Fly