A bloke in Dapto called me one autumn morning genuinely rattled. He'd been fighting a line of tiny brown ants across his kitchen bench for a fortnight, spraying it every time it appeared, and instead of giving up they'd split into three separate trails running to three different spots. He thought he was going mad. He wasn't. He'd just trained them.
That's the thing almost nobody tells you about ants. The trail you can see marching across the bench is the least important part of the whole operation. It's a supply line, not the enemy. The nest is somewhere you can't see, and it's the nest that decides whether they're a two-day annoyance or a two-month war.
Know what you're actually dealing with
Around the Illawarra we get a handful of usual suspects, and they behave differently.
Coastal brown ants are the classic kitchen invader here, especially near the water from Wollongong down to Shellharbour. Tiny, pale brown, and they nest under pavers, in wall cavities and behind skirting. They love a bit of grease and protein, so they head straight for the bin and the dog bowl.
Black house ants are the shiny black ones that turn up after rain, coming in through weep holes and window frames looking for somewhere dry.
Sugar ants and Argentine ants round out the list. Argentine ants are the real headache because their colonies link up rather than fighting each other, so a single "supercolony" can stretch across a whole street. If your neighbours have them, you probably do too. The Victorian health department has a decent rundown of the common household species and how to tell them apart if you want to play detective.
Why the can of spray backfires
Here's what happened to my Dapto bloke, and what happens in most homes. Surface spray kills the ants it lands on. Fair enough. But it does nothing to the nest, and worse, some species treat a chemical barrier across their trail as an attack on the colony. Their response is to bud, which means the nest splits and sets up new satellite colonies elsewhere. You've gone from one problem to three, and now they're avoiding the spots you sprayed.
If that sounds familiar, you've read the same story before on this site. It's exactly why cockroaches keep coming back when you chase them with a can. Same logic, different insect. Treat what you can see, miss what you can't, repeat forever.
What actually clears them
The trick with ants is to make them do the work for you. We use baits the workers carry back and feed to the colony, queen included. It's slower than a spray for the first day or two, and you'll often see more ants at first as they swarm the bait. Then the whole thing collapses from the inside. One proper treatment usually holds for months, and because we treat the harbourage points rather than just the trail, they don't simply reroute.
While the treatment does the heavy lifting, a couple of unglamorous habits make your place far less worth invading:
- Wipe the benches and don't leave dishes overnight. Crumbs are a billboard.
- Seal the pantry staples in containers, sugar and honey especially.
- Fix the dripping tap. Ants want water as much as food, and a leaky laundry is an open invitation.
- Move the pet food bowl off the floor between meals, and keep the outside bin lid shut.
Ants are one of the pests we roll into a general pest treatment most often, because a home that's getting ants usually has a couple of other freeloaders as well. If it's just the ants driving you spare, our ant control job targets the nest directly.
Look, a few ants in summer is just life near the coast. But a trail that keeps reappearing no matter what you throw at it means the nest is winning, and it won't sort itself out. Give the team a bell and we'll come treat the source, not just the line on your bench.
Need a hand with this in your home? Get a free quote or call 0430 007 651.