Defence Against Ants in Singapore — Part 2: Advanced Strategies
Part 2 of our defence guide dives deeper into the most persistent ant species in Singapore — the Crazy Ant, Ghost Ant, and Pharaoh Ant — explaining their behaviour, why they resist standard treatments, and the targeted professional methods that actually eliminate them for good.
Leia Rassid•July 2023•8 min read•NEA-Licensed
3
Problem Species
100k+
Colony Size
24h
Response Time
NEA
Licensed
In Part 1 we covered the fundamentals of ant defence. Part 2 focuses on the three most problematic species causing infestations across Singapore homes and commercial premises: the Crazy Ant, Ghost Ant, and Pharaoh Ant. Each has unique behaviours that make standard DIY treatments ineffective — and each requires a different professional approach.
Key Takeaways
✓Crazy Ants move erratically and build satellite nests far from the main colony
✓Ghost Ants are nearly invisible — their translucent bodies make them extremely hard to spot
✓Pharaoh Ants have multiple queens and will split colonies when threatened by repellent sprays
✓All three species require non-repellent gel bait that reaches and eliminates the queens
01
Species Profile
The Crazy Ant (Paratrechina longicornis)
Named for their rapid, erratic movement patterns, Crazy Ants (Paratrechina longicornis) are one of Singapore's most widespread urban ant species. Unlike most ants that follow defined pheromone trails, crazy ants scatter and dart in seemingly random directions — making them extremely difficult to track back to their nest.
Crazy Ants are highly adaptable: they nest in soil, decaying wood, leaf litter, wall voids, under tiles, and even inside electrical equipment. Their colonies can contain multiple queens, and they reproduce rapidly. A single colony can establish multiple satellite nests across a wide area.
Why DIY Fails: Repellent sprays cause crazy ants to scatter and form new satellite nests, expanding the infestation rather than containing it. Non-repellent bait is the only effective approach.
02
Species Profile
The Ghost Ant (Tapinoma melanocephalum)
The Ghost Ant earns its name from its near-translucent body and legs, leaving only a dark head visible to the naked eye. At roughly 1.3–1.5 mm, they are among Singapore's smallest ant species — small enough to enter through gaps in sealed food packaging. They emit a distinctive coconut-like odour when crushed.
Ghost Ants are a serious kitchen pest: they target sweet foods, syrup, and honey, but will also feed on proteins. They favour damp conditions and frequently nest in potted plants, behind tiles, inside wall cavities, and under kitchen appliances. Multi-queen colonies spread quickly and can span multiple units in HDB and condominium buildings.
Why DIY Fails: Their small size allows entry through almost any gap. Colony budding when disturbed means spraying creates new infestations in adjacent rooms or units.
03
Species Profile
The Pharaoh Ant (Monomorium pharaonis)
Pharaoh Ants are pale yellow to red, 1.5–2 mm long, with colonies that can contain hundreds of thousands of workers and dozens of queens. They are considered a critical pest in hospitals because they can carry and transmit Salmonella, Staphylococcus, and Clostridium — contaminating sterile areas and patient wounds.
In residential settings, Pharaoh Ants nest in warm, hidden areas: inside walls, behind baseboards, under floors, and within electrical junction boxes. Their multi-queen structure means the colony can split and relocate rapidly when threatened — this is called "budding." A single Pharaoh Ant colony treated with repellent spray can become 10 separate infestations within days.
Why DIY Fails: Pharaoh Ants are notorious for budding. Repellent sprays, dusts, and DIY traps will worsen the infestation. Only slow-acting non-repellent gel bait works by allowing workers to carry it undetected back to the queens.
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Our NEA-licensed team identifies the species, locates all satellite nests, and applies targeted gel bait that eliminates the colony at the queen — not just the foragers you can see.
For Crazy Ants, Ghost Ants, and Pharaoh Ants, spraying triggers budding. Before applying any treatment, identify the species and map the foraging routes. This step is critical to effective control.
Use non-repellent gel bait
Professional-grade gel baits (e.g. Maxforce Quantum, Advion) are formulated to be undetectable to ants. Workers carry the bait back to the colony, spreading it to the queens over 5–14 days until the colony collapses. Do not disturb bait stations during this period.
Seal entry points after treatment
Once the colony is confirmed eliminated, seal all entry points with silicone sealant: gaps around pipes, conduit, window frames, and door sweeps. Combine with regular inspections to prevent re-entry from adjacent nesting sites.
Ghost Ants have a near-translucent body with a dark head — they appear almost invisible except for the dark spot of their head. Pharaoh Ants are uniformly pale yellow-to-orange in colour, slightly larger at 1.5–2 mm. Both are tiny, so use a magnifying glass. If you are unsure, contact a licensed pest specialist for identification — treatment methods differ significantly between the two.
Yes. Crazy Ants (particularly the Raspberry Crazy Ant species) are attracted to electrical equipment and have been documented causing short circuits, damage to HVAC systems, and electrical failures in Singapore homes and commercial buildings. They nest inside junction boxes, air-conditioning units, and other warm electrical enclosures. This is a serious concern beyond typical food contamination risks.
Gel bait treatment for Crazy Ants, Ghost Ants, and Pharaoh Ants typically shows significant reduction within 72 hours, with full colony collapse over 7–21 days depending on colony size. Pharaoh Ant colonies with many satellite nests may take longer. A follow-up visit is always included to confirm elimination and treat any surviving satellite colonies.
Professional gel bait treatment reaches every queen in every satellite nest. NEA-licensed. Child and pet safe. Guaranteed results with a free follow-up visit.
I am committed to turning complex pest-management insights into clear, practical information that anyone can understand. Through my work, I aim to empower homeowners and businesses to make informed decisions that protect their health, property and environment.
