Snap Traps vs. Fertility Management
The traps keep catching rats.
The population isn't going down.
Snap traps remove individual rats. They have no effect on how fast the colony makes new ones. In a dense urban block with constant inbound pressure from the surrounding area, catching rats one at a time can't win.
Start the 90-day programThe reproduction math
Trapping removes rats. The colony keeps making more.
City rats reproduce fast. Here's what you're actually competing against.
gestation period
A female rat can produce a new litter roughly every three weeks
per litter
Average litter size for the city rat species found in NYC and NJ
per breeding female
With a consistent food source, females can produce litters year-round
pups start breeding
New females begin reproducing about six weeks after birth, compounding within a single season
To hold population steady through trapping alone, you'd need to catch rats faster than they're being born. In a dense urban block with constant inbound pressure, that's not a realistic target. Trapping manages the problem. It doesn't reduce it.
Where snap traps work
Traps work when the problem is small and contained.
For a small number of individual rodents coming in from a known point — a gap under a door you just found, a utility penetration you're sealing next week — traps placed correctly will catch them. They're also a useful option when chemical treatments aren't appropriate for a particular space.
Most exterminators include snap traps as part of a broader program. They work as one tool within a larger approach, not as the main strategy for an established colony.
Where snap traps fall short
The bigger the colony, the more the math works against you.
Needs daily checking and resetting
A trap that catches a rat and sits for three days creates a hygiene problem and stops catching new ones. Effective trap programs are time-intensive at any significant scale.
Can't keep up with a full colony
Catching two or three rats a night in an active colony of 20 to 40 animals running at full reproduction produces no measurable population decline.
Doesn't slow down breeding
Trapping removes individuals. It has no effect on reproduction. A colony that loses a third of its members will replace them within weeks at full fertility.
Creates visible dead rodents
For restaurants and food businesses, a dead rat near food prep or in a storage area is a health department finding — even when the trapping is technically working.
How they compare
Trapping removes individuals. Fertility management shrinks the colony.
Snap Traps
Removes individual rodents
No chemicals
No secondary kill risk
Reduces colony reproduction rate
Scales to established colony size
Works passively between visits
Breaks the replacement cycle
Produces 90-day declining trend documentation
Fertility Management (Evolve)
Removes individual rodents
Phase 1 handles this
No chemicals
Cottonseed-derived, EPA minimum risk
No secondary kill risk
Reduces colony reproduction rate
Scales to established colony size
Works passively between visits
Breaks the replacement cycle
Produces 90-day declining trend documentation
Field data
79%
reduction in rodent track presence
Location A — 5-month urban field study, Aug 2025 to Jan 2026
88%
drop in track density at the same site
Tracks per monitoring plate declined even where rodents were still present
90%
fertility reduction potential
When Evolve runs alongside an active pest control program
Work on the colony, not one rat at a time.
The 90-day program combines Phase 1 knockdown with continuous fertility management. The population doesn't cycle back. The 90-day trend is documented and declining.