13–16mm long. Light brown to tan body with two dark parallel stripes running from the head to the base of the wings. Much smaller than the American cockroach. Nymphs are darker with a lighter stripe.

Small dark specks resembling ground pepper or coffee grounds — found in corners of drawers, along shelf edges and behind appliances. Heavy infestations leave dark smear marks along surfaces.

Pale brown, ribbed capsules about 8mm long — often found behind appliances, inside cabinet hinges or tucked into cardboard boxes. Each contains up to 40 eggs.

A pronounced, unpleasant musty smell in kitchen areas — particularly strong in enclosed spaces like under-sink cabinets and behind fridges — indicates a significant infestation.

German cockroaches (Blattella germanica) are about 13–16mm long, light brown with two dark stripes running from their head down their back. They prefer warm, humid kitchens and bathrooms and are almost always found indoors near food and water sources. American cockroaches are much larger (35–40mm), reddish-brown, and often found in drains and sewers. If you see small, pale brown cockroaches in your kitchen cabinets or under appliances, it is almost certainly the German species.

German cockroaches reproduce extremely rapidly — a single female produces up to 400 offspring in her lifetime. They develop resistance to common insecticides quickly, hide in inaccessible locations during the day, and are nocturnal so infestations often go unnoticed until they are severe. Effective control requires a combination of gel baiting, IGR (insect growth regulator) application and thorough inspection — not just surface spraying.

Yes. German cockroaches are linked to asthma and allergic reactions — their shed skins, droppings and saliva are potent allergens, particularly harmful to children. They also mechanically transmit pathogens including Salmonella, E. coli, Staphylococcus and various parasites by contaminating food preparation surfaces and utensils.

Gel bait treatments typically show significant reduction within 1–2 weeks as cockroaches feed on bait and share it through trophallaxis (food-sharing behaviour). A full infestation clearance usually takes 2–4 weeks for a single treatment, or 4–8 weeks for a complete programme with follow-up visits. Severe infestations may require 3 treatments spaced 2 weeks apart.

Yes — NEA-approved gel baits used by licensed operators are formulated specifically for food-sensitive environments. They are applied in tiny, targeted dots in cracks and crevices away from food contact surfaces. Unlike spraying, gel bait does not require you to vacate the premises and poses minimal risk to humans and pets when applied correctly.

For residential properties with an active infestation, a 3-visit programme (initial + 2 follow-ups) is standard. For ongoing prevention — particularly in F&B establishments, commercial kitchens and hawker stalls — monthly or bi-monthly treatment contracts are recommended. NEA requires registered food establishments to maintain documented pest control records.

Clear under-sink cabinets and remove items stored behind appliances. Empty kitchen cabinets if a spray treatment is planned (gel bait requires minimal preparation). Seal food in airtight containers. After treatment, do not clean treated surfaces for at least 2 weeks so bait and residual products remain effective. Your technician will provide specific preparation instructions before the visit.

Cockroaches can re-enter from neighbouring units, drains or delivered packaging. This is particularly common in HDB flats and shophouses with shared pipe chases. A follow-up treatment programme with ongoing prevention measures — sealing entry points, fixing leaks and maintaining cleanliness — significantly reduces the risk of re-infestation. Many clients opt for quarterly prevention contracts.