If you're growing stone fruit, citrus, or tomatoes in a WA backyard, you've almost certainly had an unwelcome visitor: the Mediterranean fruit fly (Ceratitis capitata), commonly known as Medfly.

Western Australia is one of the few states in the world where Medfly is the dominant species — and it causes millions of dollars in crop losses every year. The good news? With the right traps and a consistent approach, you can dramatically reduce fruit fly damage without resorting to broad-spectrum pesticides.

What Is the Mediterranean Fruit Fly?

The Medfly is a small, mottled fly about 4–5mm long with distinctive yellow and brown markings. The female lays eggs directly into ripening fruit; the larvae (maggots) then feed from the inside, causing the fruit to rot and drop prematurely.

It's not just a nuisance — a single Medfly infestation can wipe out an entire season's harvest.

The WA Medfly Season

Medfly pressure in WA peaks in late spring through autumn (October–April), when temperatures warm up and fruit starts to ripen. That's the critical window to have your traps in place before the population explodes — not after you notice damaged fruit.

Step-by-Step Control Strategy

1. Trap and Monitor Early

Place male-lure traps around your garden from September onwards. Monitoring traps tell you when Medfly activity is rising so you can act before damage occurs.

2. Use Protein Bait Sprays

Female Medflies are attracted to protein-based baits (they're seeking nutrients for egg development). Apply a protein bait spray to foliage around your fruit trees once or twice a week during peak season.

3. Bag or Net Your Fruit

For high-value fruit like mangoes, figs, or stone fruit, exclusion netting or individual fruit bags are your most reliable protection — no chemicals required.

4. Remove Fallen and Overripe Fruit

Every piece of fallen fruit is a breeding site. Pick up and bin (don't compost) any dropped fruit weekly, especially during peak season.

5. Maintain Pressure All Season

Medfly control is not a one-off task. Consistent trapping and baiting throughout the warm months is what gets results.

Which Trap Is Right for WA Backyard Growers?

Make sure you're buying a trap specifically formulated for Mediterranean fruit fly — not Queensland Fruit Fly (QFF), which is a different species and uses a different lure. WA is a Medfly zone, not a QFF zone.

Our Fruit Fly Trap Kit – 2 Traps with 15 Refills for WA Mediterranean Fruit Fly is purpose-built for WA conditions, with enough bait refills to cover a full season. For larger properties or orchards, the West Australian Mediterranean Fruit Fly Trap x 4 Bulk Buy gives you broader coverage.

Browse our full range of Fruit Fly Traps and Baits — all Australian stock, shipped fast from Perth.

When to Call It In

If Medfly populations remain high despite consistent trapping, contact the DPIRD Fruit Fly Hotline or your local council for advice on area-wide management programs. Some WA councils run community bait programs during peak season.

Quick Summary

  • Start trapping in September before the season peaks
  • Use Medfly-specific (not QFF) lures and baits in WA
  • Combine traps + protein bait spray + fruit removal for best results
  • Replace bait refills regularly — exhausted bait doesn't work
  • Consistency beats intensity: keep at it all season