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Centipedes and millipedes look similar but behave very differently. Centipedes are predatory and can bite; millipedes are scavengers and harmless. Here is the identification and treatment guide.
Centipede vs millipede differences
| Feature | Centipede | Millipede |
|---|---|---|
| Body shape | Flat | Round |
| Legs per segment | 1 pair | 2 pairs |
| Movement | Fast, predatory | Slow, defensive |
| Defense | Bite (venomous) | Curl up, release smelly fluid |
| Diet | Other insects | Decaying plants |
| Indoor risk | Painful bite possible | Harmless |
Centipede bite
House centipede bites cause pain similar to bee sting. Symptoms typically resolve in hours. Allergic reactions rare. Children may have stronger reactions.
Treatment for indoor invasions
Step 1: Eliminate moisture
Both species need humid environments. Reduce basement and bathroom humidity. Fix leaks.
Step 2: Apply Bifen IT to perimeter
Outdoor perimeter spray reduces incoming population.
Step 3: Apply DE in cracks and crevices
Long-term residual protection in basements, garages, and storage areas.
Step 4: Eliminate other insects
Centipedes follow their prey. Reducing other insect populations indirectly reduces centipede attraction.
Verdict
House centipedes are beneficial outdoors (they eat other pests) but unwelcome indoors. Millipedes are harmless. For both, humidity reduction + perimeter treatment + DE in living areas eliminates indoor presence over 30-60 days.
Reminder: Always read product labels and follow safety instructions.