Moth spray vs moth trap: which one actually touches the larvae
Updated: 23 October 2026
You bought a glue card because the pack showed a moth, and a month later the jumper has new holes. A moth spray vs moth trap choice is about which insect each tool can touch. A clothes-moth pheromone trap attracts males of that species. The larvae in the wool never fly to it. This page says when to use a trap, when to use a spray from our [moth spray comparison](/hub/pest-control/moth-spray), and when to use both. We did not test trap brands, and trap ASINs are not in this category. A qualifying purchase can earn us a commission at no extra cost to you.
You bought a glue card because the pack showed a moth, and a month later the jumper has new holes. A moth spray vs moth trap choice is about which insect each tool can touch.
You bought a glue card because the pack showed a moth, and a month later the jumper has new holes. A moth spray vs moth trap choice is about which insect each tool can touch. A clothes-moth pheromone trap attracts males of that species. The larvae in the wool never fly to it. This page says when to use a trap, when to use a spray from our moth spray comparison, and when to use both. We did not test trap brands, and trap ASINs are not in this category. A qualifying purchase can earn us a commission at no extra cost to you.
Our top picks
| Badge | Product | Stated action | Active | Where to use | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Acana Acana fresh linen 500 ml | Kills moths, eggs and larvae | Transfluthrin | Carpets, rugs and curtains | 9.0 | about £13.49 | View offer |
 Zero In Zero In ZER434M six-pack | Kills clothes moths, larvae and eggs | Not named | Wardrobes and drawers | 9.1 | about £17.21 | View offer | |
| Alternative |  Clothes Doctor Clothes Doctor knitwear mist | Natural moth repellent | Not named | Wool and cashmere knitwear | 7.3 | about £15.49 | View offer |
On this page
What a pheromone trap actually catches
English Heritage's line is the one to keep: pheromone traps find where moths come from, the lure is species-specific and attracts only males, and traps will not control an infestation. A full card means male clothes moths found that lure. It does not mean larvae in the seam are dead. Which? says traps help you monitor, and they will not eradicate.
An empty card is just as easy to misread. London Moth's list includes the wrong species, a draught, a nearby cedar or lavender repellent, an old lure, and a gap between adult emergences. Eggs and larvae are never attracted.
What a spray is being asked to do
A spray in this set is being asked to touch insects on a surface the label names. Which? says an insecticide kills larvae only on contact. It does not crawl into a folded jumper you left on the rail, and it does not reach wool underlay because you misted the pile.
Acana's three cans name transfluthrin and say they kill moths, eggs and larvae. The 500 ml fresh-linen spray, £13.49, is the only one that states an area, about 13.75 square metres. Zero In's six-pack, £17.21, is the top pick for wardrobes and drawers, with no active named on the page. The Clothes Doctor mist, £15.49, is a knitwear repellent. Put that mist beside a trap and you may hide the males. The buying rules are on the clothes moth killer spray buying guide.
When a trap on its own is enough
Use a trap alone when the wool is still intact and you want to know whether male clothes moths are flying. Place it in still air, out of a draught, and away from a cedar or lavender mist. Read a catch as males of this species passed here. Read an empty card as this lure caught nothing. Do not read either result as the jumpers are safe.
If nothing is damaged, buy the trap and skip the insecticide. If you want cedar in the wardrobe, buy the mist and accept that it is not a killer and that it can suppress a trap beside it. Do not buy a pantry lure for a clothes moth.
When you need a spray, or both
Use a spray, and not a trap alone, when you already have holes, cases, or pile loss. Those larvae will not land on the glue. Choose a listing that states eggs and larvae, then follow that can. In this set that is Acana when you want transfluthrin and, for carpet, a stated area, or Zero In when you are doing more than one wardrobe and will read the label. Leave Clothes Doctor for undamaged knitwear. Leave Rentokil if you need an ingredient on the listing.
Use both when you want to see whether males keep flying after you have cleaned and treated. The trap is the check. The spray is the contact step on the surfaces the label allows. Put the trap up after the smell has cleared, or an empty card will flatter you. Cleaning and spraying are on how to use moth spray. Edges and underlay are on carpet moth spray.
Common questions
Will a pheromone trap stop holes in jumpers?
No. English Heritage says the lure attracts only males and that traps will not control an infestation. The holes are larvae in the wool, and larvae are not drawn to the glue. Which? says traps will not eradicate. A trap can show you that male clothes moths are flying.
Why does the trap catch only some moths?
A clothes-moth lure is built for males of that species. Females are not the target. The British Pest Control Association's note says a male-targeted pheromone does not affect females, so mating can still happen while the card fills. A pantry lure is the wrong species for a wardrobe.
The trap is empty and I still have holes. What does that mean?
The lure caught no males, and the larvae are still feeding. London Moth lists the wrong species, a draught, cedar or lavender nearby, an old lure, and a gap between adult flights. Eggs and larvae never come to the card, so holes can continue on a blank trap.
The trap is full. Am I winning?
You are catching males. That is useful, and it is not clearance. Females may already have laid, which is why a crowded card can sit next to fresh holes. Which? treats traps as monitoring, not as eradication.
Can I use cedar next to a trap?
You can, and you may stop the trap telling the truth. London Moth includes a nearby cedar or lavender repellent among the reasons a card stays empty. The Clothes Doctor mist in this comparison is a cedarwood and vanilla repellent for knitwear, not an insecticide.
When is a spray the right half of the job?
When larvae or holes are already there, and you accept that it works only where it contacts them. Acana states that eggs-and-larvae job and names transfluthrin. Zero In's title states it for wardrobes and drawers, without an active on the listing. If the clothes are undamaged and you only want to know whether moths are flying, that is the trap.
Related pages
Sources
Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these six listings. Last checked 19 October 2026.
- Natural History Museum clothes moth guide (retrieved 19 October 2026)
- English Heritage clothes moth guideline (retrieved 19 October 2026)
- HSE using biocides (retrieved 19 October 2026)
- BPCA moth control advice (retrieved 19 October 2026)
- Southwark Trading Standards mothball leaflet (retrieved 19 October 2026)
- Which? how to get rid of clothes moths (retrieved 19 October 2026)
- Rentokil DIY moth products (retrieved 19 October 2026)
- STV 2024–25 catalogue (retrieved 19 October 2026)