If you've been seeing more large cockroaches crawling around your driveway, garage, patio or landscaping at night, you're not alone.
Across Sacramento County, reports of outdoor cockroach activity have been increasing, and one invasive species is becoming a major part of the problem: the Turkestan cockroach.
The City of Sacramento says Turkestan cockroaches have been confirmed locally and are outcompeting other outdoor cockroach species. UC Integrated Pest Management also describes them as a newer invasive species that has become very common in California's residential outdoor areas.
For homeowners across Sacramento, Elk Grove, Natomas, Roseville and surrounding communities, this is one pest worth learning how to identify.
What Is a Turkestan Cockroach?
The Turkestan cockroach, or Blatta lateralis, is an invasive outdoor cockroach that has rapidly adapted to California neighborhoods.
Unlike German cockroaches, which typically establish infestations inside kitchens and other indoor areas, Turkestan cockroaches primarily live and reproduce outdoors.
They're especially comfortable in the warm, irrigated environments common throughout the Sacramento Valley.
UC IPM says they commonly live around:
- Water meter and irrigation boxes
- Cracks in concrete
- Landscaping
- Leaf litter
- Potted plants
- Wood and debris piles
- Outdoor drainage areas
- Rock walls
- Sewer systems
They prefer dark, moist and protected areas during the day before emerging at night to search for food and water.
That means the irrigation box sitting quietly in your front yard could be exactly the type of environment these cockroaches are looking for.
Why Are There So Many Turkestan Cockroaches in Sacramento?
Sacramento provides these cockroaches with several things they need to thrive: warm weather, moisture and plenty of places to hide.
Pest Pros Pest Solutions President Josh Fleenor recently spoke with CBS Sacramento about the increase in Turkestan cockroach activity throughout the region.
He pointed to Sacramento's warm climate, irrigation and rapid residential development as factors creating favorable environments for the species.
Newer communities can be especially attractive because they often contain freshly installed landscaping, irrigation systems, water-meter boxes and other protected areas where these cockroaches can hide.
Areas experiencing significant development, including West Roseville and Elk Grove, were specifically discussed as examples of communities creating this type of environment.
And what was once a more seasonal issue is becoming much harder to ignore.
Pest Pros has been receiving Turkestan cockroach calls throughout the year, rather than only during the traditional outdoor cockroach season.
How Do You Identify a Turkestan Cockroach?
Correct identification matters because not every cockroach behaves the same way or requires the same approach.
An adult Turkestan cockroach is approximately one inch long.
Female Turkestan Cockroaches
Females are typically dark brown to black and have cream-colored markings along the edges behind the head and around their short wings.
They are commonly mistaken for Oriental cockroaches, sometimes referred to as water bugs.
Male Turkestan Cockroaches
Males look considerably different.
They are usually lighter, with yellowish-tan wings extending along the body and cream-colored markings along the edges.
Because of their appearance, homeowners sometimes mistake males for American cockroaches.
Young Turkestan cockroaches can also have noticeable reddish coloring on their upper body and legs.
If you're not sure what type of cockroach you're seeing, professional identification can make a big difference in determining the right treatment strategy.
Why Am I Finding Them in My Garage?
This is one of the most common questions homeowners have.
Turkestan cockroaches prefer living outdoors, but they can still wander into garages and homes, particularly when outdoor populations become large or they're searching for water.
You may notice them:
- Near garage doors
- Around exterior doors
- Along baseboards
- Near sliding glass doors
- Around plumbing penetrations
- Inside garages
- Near windows
- Dead or upside down shortly after entering
The good news is that Turkestan cockroaches behave differently from German cockroaches.
UC IPM says Turkestan cockroaches generally do not establish indoor populations. They reproduce outside and occasionally wander indoors when conditions push them there.
That doesn't make finding one running across your garage floor any more enjoyable.
It does make proper identification especially important.
Where Should Sacramento Homeowners Look?
If you're seeing these cockroaches around your property, start outside.
Check Your Irrigation Boxes
This is one of the first places our Service Pros look.
Irrigation and water-meter boxes provide darkness, protection and moisture, creating excellent hiding areas.
Look Under Landscaping Debris
Leaf litter, bark, wood piles and accumulated yard debris can provide shelter.
Keeping landscaping maintained can reduce potential hiding areas.
Inspect Cracks Around Concrete
Turkestan cockroaches can shelter in gaps underneath sidewalks, patios and concrete slabs.
Check for Irrigation Leaks
A small irrigation leak may provide a reliable water source.
Sacramento County recommends repairing leaking irrigation and reducing unnecessary moisture around the property as part of managing Turkestan cockroaches.
Look Around Potted Plants
Pots and landscaping materials can provide cool, protected areas during Sacramento's hottest days.
Why Spraying Every Roach You See Isn't Always the Solution
Seeing a cockroach often leads to one reaction: grab the spray.
But Turkestan cockroach control is more complicated than simply spraying whatever appears on the patio.
Sacramento County recommends focusing first on habitat modification and exclusion, including reducing outdoor food sources, correcting irrigation leaks, cleaning up debris and sealing potential entry points.
The county's guidance also notes that broad insecticide spraying may not prevent cockroaches from entering a structure or meaningfully reduce the overall population.
Effective pest management starts with figuring out where the cockroaches are coming from and why they're thriving there.
How to Help Keep Turkestan Cockroaches Away
Sacramento-area homeowners can take several steps around their property:
Fix irrigation leaks.
Moisture is one of the biggest attractions for outdoor cockroaches.
Remove leaf litter and debris.
Reduce the protected areas where cockroaches can hide during the day.
Don't leave pet food outside overnight.
Outdoor food sources can support larger cockroach populations.
Seal entry points.
Check weather stripping, door sweeps and gaps around exterior doors.
Inspect water-meter and irrigation boxes.
Large numbers of cockroaches inside can indicate significant activity around the property.
Keep landscaping maintained.
Reduce excessive vegetation and accumulated organic material near the foundation.
These measures don't guarantee you'll never see another cockroach, but they can make your property significantly less inviting.
Seeing Large Cockroaches Around Your Sacramento Home?
If you're suddenly noticing cockroaches around your garage, driveway, irrigation box or backyard, don't automatically assume you have an indoor roach infestation.
You may be dealing with Sacramento's increasingly common Turkestan cockroach.
At Pest Pros Pest Solutions, we've been watching this invasive species spread throughout the Sacramento region and helping local homeowners identify and manage the conditions allowing them to thrive.
From established Sacramento neighborhoods to rapidly growing communities in Elk Grove, Natomas, Roseville, Rocklin and beyond, our team understands the pest pressures unique to the Sacramento Valley.
If you're not sure what kind of cockroach you're seeing, we'll help you figure it out.
Step Up to the Pros
Contact Pest Pros Pest Solutions to schedule a no-cost, no-commitment inspection and find out what's really crawling around your property.
If pests come back, so do we.