Cockroach Species in Westchester County
Three species account for nearly all residential cockroach infestations in Scarsdale. Correct identification drives the right treatment strategy.
German Cockroach (Blattella germanica)
The most common household species. Small (10–15mm), tan with two dark stripes behind the head. German cockroaches do not survive outdoors in NY winters — they are introduced via bags, boxes, appliances, and shared housing. They reproduce faster than any other cockroach species: a single female produces up to 300 offspring per year.
American Cockroach (Periplaneta americana)
Larger (35–40mm), reddish-brown, with a yellow figure-8 pattern behind the head. Primarily a sewer and basement species that enters through floor drains, utility tunnels, and foundation gaps. Activity peaks in warm, humid conditions.
Oriental Cockroach (Blatta orientalis)
Dark brown to black, 20–25mm. Prefers cool, damp environments — basements, crawl spaces, and drains. Often called "water bugs." Enters through gaps around pipes and drains.
High-Risk Zones in Your Home
Cockroaches concentrate in warm, humid spaces near food and water. This floor plan shows typical risk zones.
Health Risks of Cockroach Infestations
Cockroaches are not just a nuisance — they are a documented public health concern:
- Allergens: Cockroach feces, shed skins, and saliva are leading triggers of childhood asthma — particularly in dense housing
- Bacteria: Salmonella, E. coli, and Staphylococcus are commonly found on cockroach bodies after contact with waste
- Food contamination: Cockroaches defecate where they walk, contaminating any food preparation surface they contact
Our Cockroach Extermination Program
Professional Inspection
Technicians use sticky monitoring traps to confirm species, count, and distribution before treatment. Placement and product selection differ significantly between German cockroach and American cockroach infestations.
Gel Bait Treatment
Professional-grade gel baits (e.g., Advion, Maxforce) are applied in micro-placements inside cracks, crevices, and harborage points — behind appliances, under sinks, around pipe penetrations, and inside cabinet hinges. Cockroaches consume the bait and spread it through feces and body contact to other colony members.
Insect Growth Regulators (IGRs)
IGRs prevent cockroach nymphs from maturing into reproductive adults, breaking the breeding cycle. Applied as a residual spray to harborage zones, IGRs remain active for 30–90 days and are critical for German cockroach control.
Follow-Up Service
A second service visit at 14–21 days assesses bait consumption, treats any newly identified harborage points, and confirms population collapse. German cockroach infestations typically require 2–3 visits for complete elimination.
Frequently Asked Questions
Why do I have cockroaches if my home is clean?
Cockroaches enter through utility pipe gaps, drain lines, grocery bags, and cardboard boxes — cleanliness is not the issue. German cockroaches are commonly introduced via deliveries and shared laundry facilities. Once inside, even minimal food and moisture sustain a colony.
How long does cockroach treatment take to work?
Gel bait treatments show significant reduction within 1–2 weeks. Full elimination typically takes 3–6 weeks across 2–3 service visits. German cockroaches reproduce rapidly, so follow-up visits are essential.
Are cockroach treatments safe for food preparation areas?
Yes. Gel baits are applied in targeted micro-placements inside cracks and crevices, away from food contact surfaces. Kitchen use can resume immediately after treatment without removing food or appliances.
Don't Wait — Cockroaches Double in 30 Days
German cockroaches reach reproductive maturity in just 60 days and produce up to 40 eggs per egg case. A small initial infestation becomes a severe problem quickly without professional intervention.
Related Resources
For commercial cockroach control, see our Commercial Pest Control page. For pest identification, visit our Pest Glossary.