Pest profile

Pepper Maggot

Zonosemata electa · Diptera: Tephritidae[2]

Pepper maggots tunnel inside sound pepper fruit, leaving little outside evidence except a small dimple where the egg was laid.[1]

Pepper maggot fly, a yellow-orange fly with green eyes and brown-banded wings, on a leaf
Pepper maggot fly, a yellow-orange fly with green eyes and brown-banded wings, on a leaf. (c) skitterbug, some rights reserved (CC BY) — via iNaturalist, CC BY 4.0

How to identify it

  • Larvae are nearly 1/2 inch, light yellow when mature, pointed at the head end and blunt at the rear.[1]
  • Adults are bright flies with a pale yellow head, green eyes, tan thorax and clear wings with brown bands.[1]

Look-alikes

Look-alikeHow to tell them apart
European corn borerCorn borers leave some outside evidence on peppers; pepper maggots leave almost none.[1]

Where it lives

It's a sporadic pest of peppers along the Atlantic coast, Indiana and Missouri, first recorded in Kentucky in 2002.[1]

US map: public records from 26 states since 1990 (GBIF).

Biology and life cycle

Larvae feed two to three weeks, then drop to the soil and pupate two to four inches deep.[1]

There's one generation a year, with adults emerging from early summer through mid-August.[1]

Damage and signs

  • Infested fruit shows internal tunneling and discoloration, often turns color early, and the cap may separate at harvest.[1]

Health risk

It feeds on plants; UK Extension mentions no risk to people.[1]

Control

Prevention

Rotate: avoid planting peppers in or near fields with a history of pepper maggot.[1]

Sanitation

Remove rotting fruit, destroy infested fruit and cull piles, and destroy nearby horsenettle, an alternate host.[1]

Common questions

Why do my peppers rot inside with no holes?
Pepper maggots feed inside while leaving only a small dimple outside.[1]
Are the tiny maggots in rotten peppers pepper maggots?
Not necessarily; small maggots feeding on decaying material don't injure sound peppers.[1]

Sources

  1. University of Kentucky Entomology (ENTFACT), “Pepper Maggot in Kentucky (ENTFACT-316).” entomology.mgcafe.uky.edu/ef316 (accessed 2026-10-06)
  2. iNaturalist, “Zonosemata electa taxon page (order and family).” www.inaturalist.org/taxa/554218 (accessed 2026-10-06)

Updated 2026-10-14. Built from sourced records. Spot an error? Tell us.