Cockroaches

The Problems Cockroaches Cause

Cockroaches are resilient pests that thrive in warm, humid environments like kitchens, bathrooms, and food storage areas. They're a serious hygiene concern, spreading bacteria such as salmonella and E. coli as they move between drains, waste, and food surfaces, and their droppings and shed skins can trigger allergies and asthma in sensitive individuals.

For businesses, particularly in food service, a cockroach problem can pose serious hygiene compliance risks.

If you've noticed signs of cockroaches, get in touch for a professional inspection.

How We Treat Cockroach Infestations
Cockroach infestations need a thorough, targeted approach.

Our trained technicians start with a full inspection, identifying the species involved, locating harbourage points such as cracks, pipework, and behind appliances, and assessing the scale of the infestation. From there, we put together a tailored treatment plan, typically combining gel baiting, insect growth regulators, and targeted residual treatments applied directly to hiding spots and key entry points.
We'll also advise on proofing and hygiene measures as ongoing prevention is essential to stop cockroaches returning once the initial infestation is cleared.
Treatment usually requires more than one visit.

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The Cockroach Life Cycle — and Why It's So Hard to Break

Cockroaches are one of the most successful survivors in the insect world, and a large part of that comes down to how they reproduce. Understanding their life cycle explains why a cockroach problem can escalate so quickly — and why effective treatment needs to target more than just the roaches you can see.

Egg, Nymph, Adult

Unlike insects that go through a pupal stage, cockroaches develop through incomplete metamorphosis — meaning young cockroaches, known as nymphs, look like miniature versions of adults from the moment they hatch, minus fully developed wings.

It all starts with the egg case, known as an ootheca. A single German cockroach female — the species most commonly found indoors in the UK — can produce an ootheca containing around 30 to 40 eggs at a time. What makes this species particularly resilient is that the female carries the ootheca with her, tucked at the end of her body, right up until just before the eggs are ready to hatch. This constant protection means the eggs are shielded from many surface treatments and predators until the very last moment.

Once hatched, nymphs go through a series of moults — typically six or seven — shedding their exoskeleton and growing larger each time, over a period of roughly two to three months before reaching adulthood. Adult cockroaches can then live for several months to around a year, and a single female may produce several more egg cases over her lifetime — meaning one cockroach can be responsible for hundreds of descendants.

Why This Makes Infestations Explode

Because cockroaches don't reproduce in neat, synchronised generations, a single infestation usually contains eggs, nymphs, and adults all at once, at different stages of development. Treat only the visible adults, and you leave behind protected eggs and hidden nymphs ready to take their place — which is exactly why infestations often seem to bounce back after a single treatment.

Breaking the Cycle

Effectively dealing with cockroaches means targeting every stage of the life cycle, not just the adults on show. This is where professional treatment differs from a can of shop-bought spray. Gel baits are designed to be carried back to the harbourage and shared among the colony, reaching roaches hidden deep in cracks and voids that sprays never touch. Insect growth regulators (IGRs) work differently again, disrupting the moulting process so nymphs can't develop into reproductive adults — cutting off future breeding rather than just killing what's currently visible.

Because eggs are protected inside the ootheca until just before hatching, a single visit is rarely enough. Follow-up treatments are essential to catch newly hatched nymphs before they mature and reproduce, gradually breaking the cycle across every generation present.

It's a slower, more strategic approach than simply spraying what you see — but it's the only way to genuinely break the cycle rather than just knocking back the numbers temporarily.

If you're dealing with a cockroach problem, our trained technicians at Kent Pest and Wildlife Management can put together a treatment plan that tackles the infestation at every life stage.