The Surinam Cockroach (Pycnoscelus surinamensis) is dark brown to black body with lighter brown wings and typically measures 3/4–1 inch. The Surinam cockroach (Pycnoscelus surinamensis) is an unusual cockroach species in that it is almost entirely parthenogenetic — populations consist almost entirely of females that reproduce without m.

The Surinam Cockroach is generally low-risk, but caution is still advised. Surinam cockroaches damage plant roots and can kill potted plants and garden plants. They are not a significant health risk to humans but can be introduced into homes via infested soil or plants.

In Arizona, surinam cockroachs are most often encountered in the following situations: Wilting or damaged plants with no obvious above-ground cause. Cockroaches found in soil when repotting plants or digging in garden beds. Sightings in mulch, compost, or leaf litter.

The Surinam Cockroach is most active during: Year-round in warm Arizona climates. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Inspect potting soil and plants before bringing them indoors. Use sterile potting mix. Keep mulch layers thin and away from the foundation. Avoid overwatering, which creates ideal burrowing conditions.

Soil treatments with appropriate insecticides in affected garden areas. Granular baits in mulch and landscaping. Replacement of infested potting soil.

Cockroaches are nocturnal and highly secretive — seeing even one during the day is often a sign of a larger hidden population. Surinam Cockroachs reproduce rapidly, so early intervention is critical. Contact Pest Control Bros for a thorough inspection if you spot one.