An ant killer is not one product but four different methods: gel, bait, powder and spray. Choosing the wrong one is why many say ants "came back after two days". The rule: the ants you see are a small part of the colony, and the solution must reach the nest.
Gel and bait: usually best for the home
- Ants eat it and carry it to the nest, eliminating the colony.
- Place small dots on ant trails and near cracks, not on wide surfaces.
- Do not spray insecticide near bait; the smell keeps ants away.
- It needs patience: more ants appear for the first two days, then fewer.
Powder: for cracks and dry places
- Suits ant entry points, dry cracks and behind appliances.
- Does not work in damp places such as bathrooms and sinks.
- Apply a thin layer, away from children and pets. See the difference between powder types.
Spray: for trails and outdoor entries
- Leaves a residual layer at entries, openings and around the building.
- Kills ants that contact it, but cannot reach the nest alone.
- Not used in kitchens on surfaces that touch food.
Choose by where the ants are
- Kitchen: gel or bait on trails, with food sealed and surfaces cleaned.
- Bathroom: fix moisture and leaks first, then gel in cracks away from direct water.
- Garden and entries: outdoor spray or granules on borders and trails.
- Nest inside a wall: continuous bait and follow-up; a specialist may be needed.
Is "ant poison" safe?
- It is an insecticide and not safe to touch. Keep it from children and pets and follow the label.
- Choose a product that lists ants explicitly and read directions and warnings.
- Do not mix different products at the same spot.
Common mistakes
- Spraying visible ants only and leaving the nest.
- Putting a large amount of gel in one spot.
- Wiping the trail with water and removing the gel with it.
- No follow-up after a week.
For the full plan read eliminating ants for good, for prevention preventing ants, and to identify the type house ants.
Why bait works better than spraying on ants
Foraging workers carry part of the food back to the nest and share it with other ants, the queen and the brood through mutual feeding. If the bait is slow-acting, it reaches these individuals before the worker that carried it dies, which does not happen with a spray that only kills what it touches.
So do not judge a bait by how fast the visible column dies, but by how far activity disappears after a few days.
Choose the bait your ants actually want
Ants' preference shifts between sugars, protein and fats depending on the species, the season and the state of the colony. If the ants ignore a sugary bait, try a protein or fatty bait next to it, watch which one they favour, then concentrate on that one.
Steps that give a better result
- Watch the column first to learn its path and entry point.
- Place the bait near the path and to its side, not directly on the column.
- Do not kill the visible column and do not spray next to the bait, since this cuts the food supply to the nest.
- Keep nearby surfaces free of sugars and crumbs so the ants turn to the bait.
- Check the bait daily in the first days and renew it if it dries or runs out.
When to expect results and how to tell it is improving
Ant numbers around the bait often rise in the first days, which is a good sign that it is being carried to the nest. The column then thins gradually and disappears within days to two weeks depending on the colony size. If activity continues unchanged beyond that, change the bait type or position, or make sure no other food source is competing with it.
Ant types that need different handling
- Carpenter ants: they nest in damp wood and you need to reach the nest, see carpenter ants.
- Pharaoh ants: their colonies may split after a repellent spray, so bait suits them better, see pharaoh ants.
- Fire ants: they nest in soil and sting, and need nest treatment with care, see fire ants.
Products at Orkida
- Advion ant gel package 120 g (Syngenta): gel for trails and the nest.
- Advion WDG (Syngenta) 10 g: granules mixed with water for targeted treatment.
- K-Othrine Partix (Envu) 1 L: for entries and outdoor trails.
- Economy ant package and professional package.
Browse ant insecticides.
FAQ
What is the strongest ant poison?
The one that reaches the nest: bait and gel. Spray only kills visible ants.
How long does gel take?
It depends on colony size; effects usually appear within days and need follow-up.
Can I use gel and powder together?
Better to give each product its own spot; do not put powder near gel.
Summary
Gel and bait for the colony, powder for dry cracks, spray for outdoor entries. Choose by location, do not spray near bait, and follow up after a week.