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The American cockroach (Periplaneta americana), known throughout Florida as the “palmetto bug,” is the giant 1.5-2 inch reddish-brown roach that flies indoors at night. Here is the complete Florida guide.
How to identify American cockroaches
- 1.5-2 inches long — significantly larger than German roaches.
- Reddish-brown body with yellow figure-8 pattern behind head.
- Wings on adults — they CAN fly, especially in warm humid weather.
- Most common outdoor cockroach in Florida.
- Invade homes through gaps, drains, and around plumbing penetrations.
Where they live in Florida
- Outdoors: Palmetto plants, mulch beds, tree holes, sewers, woodpiles.
- Indoors: Bathrooms, basements, garages, under sinks, around water heaters.
- Crawlspaces and attics with humidity.
Treatment strategy
Outdoor perimeter treatment (most important)
Spray Bifen IT around home foundation, mulch beds, near sprinkler heads, and around plumbing penetrations. Treat monthly during warm months.
Outdoor bait stations
Place granular bait around perimeter for outdoor population reduction.
Indoor backup with Advion gel
For occasional indoor invaders, place gel bait near drains and under sinks.
Drain treatment
Weekly pour boiling water down rarely-used drains to flush out potential breeding spots.
Florida-specific prevention
- Move mulch and palm fronds AWAY from foundation (12+ inches gap).
- Clear standing water (pet bowls, plant saucers, gutters).
- Install door sweeps and seal plumbing penetrations.
- Replace damaged screens (American roaches fly into open windows at dusk).
Verdict
Palmetto bugs in Florida are mostly an outdoor pest invading indoors occasionally. Focus 80% of effort on outdoor perimeter treatment with Bifen IT, 20% on indoor gel bait for stragglers. Reduces population dramatically within 30-60 days.
Reminder: Always read product labels and follow manufacturer safety instructions. For dangerous pests or large infestations, hire a licensed professional.