You spot a cockroach in the kitchen at night. You rush to the store, buy a can of spray, and blast every roach you can find. For a few days, things seem fine. Then they are back — and sometimes in greater numbers. This frustrating cycle plays out in homes across Odisha every day. Here is the science behind why it happens.
The Problem With Surface Sprays
Over-the-counter contact sprays are designed to kill cockroaches on direct contact. They work — on the roaches you can see. But cockroaches are nocturnal creatures that spend 75% of their time hiding in crevices, behind appliances, inside wall voids, and deep under cabinets. The spray never reaches them. Worse, the strong chemical smell forces cockroaches deeper into hiding and can cause them to scatter into new areas of your home.
Egg Capsules Cannot Be Sprayed to Death
Female German cockroaches — the most common species in Odisha homes — carry an egg capsule (ootheca) containing 30–48 eggs. This capsule has a hard, protective outer shell that is highly resistant to surface sprays. Even if you kill every adult cockroach today, the hidden egg capsules will hatch within 4–6 weeks, restarting the infestation from scratch. This is why the problem always comes back.
Resistance Is Growing
Decades of widespread OTC spray use has led cockroach populations to develop resistance to many common active ingredients like permethrin and cypermethrin. Studies from India have documented significant resistance in urban cockroach populations. Using the same product repeatedly makes it less effective over time while exposing your family to unnecessary chemicals.
What Professional Cockroach Treatment Actually Does
Professional treatment uses a combination of methods that work together:
- Gel baits — applied in tiny amounts in cockroach harborage areas (inside hinges, under appliances, behind switches). Cockroaches eat the bait and carry it back to the nest, killing the entire colony including hidden egg-bearers.
- Residual spray — applied to perimeter areas and entry points to prevent reinfestation from outside.
- Crack and crevice treatment — specifically targeting the hidden areas where cockroaches actually live, not just surfaces.
- Follow-up inspection — monitoring to ensure the colony has been eliminated and eggs have not hatched.
Alongside Treatment: What You Must Do
- Fix all plumbing leaks — cockroaches need water to survive
- Store all food in sealed containers, including pet food
- Do not leave dirty dishes overnight
- Seal gaps around pipes with steel wool or sealant
A single professional cockroach treatment from EPCS eliminates the colony — not just the individuals. Our gel bait method is odourless, child-safe, and requires no evacuation of your home. Results are typically visible within 72 hours.
