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Slug pellets vs copper tape

Updated: 23 October 2026

You are between a tub of pellets and a roll of copper tape, and the public advice does not agree. The RHS says not to use slug pellets, including organic ones, and a Wisley lettuce trial found no benefit from copper tape. Which? and AHDB still describe ferric phosphate as the remaining home pesticide. This page is slug pellets vs copper tape as two principles, then what that means for the one pellet and the barriers in our set. Pounds are on the [snail protection comparison](/hub/pest-control/snail-protection). Products Compared did not lab-test these listings. Figures are the 19 October 2026 amazon.co.uk scrape. A purchase through our links can earn a commission at no extra cost to you.

You are between a tub of pellets and a roll of copper tape, and the public advice does not agree.

Our top picks

HanYun HanYun 12 pack collars, 21 cm

Best overall

HanYun HanYun 12 pack collars, 21 cm
8.2/10about £12.99
View offer
Provanto Provanto Slug & Snail Killer Max 800 g

Rank 2

Provanto Provanto Slug & Snail Killer Max 800 g
9.1/10about £7.32
View offer
kanta kanta copper slug tape, 20 mm

Best value

kanta kanta copper slug tape, 20 mm
7.6/10about £3.99
View offer
On this page
  1. 1.What the pellet actually does
  2. 2.What the barrier trial found
  3. 3.What these listings add
  4. 4.When to pick which

What the pellet actually does

Ferric phosphate pellets are a pesticide. A slug or snail has to eat them. AHDB says feeding then stops, and death is often underground within about three to six days, so you judge new leaves rather than bodies. The only pellet here is Provanto, 800 g at £7.32, 4.4 from 6,699 reviews. The amazon table does not name the active. A Dobbies page states ferric phosphate and 3.8 g per square metre. That is not a Which? test of this ASIN. UK reviews report damage stopping, and also mice, mould in a cold frame, and a repeat after rain.

What the barrier trial found

The RHS lettuce trial, reported with the Guardian on 27 September 2018, used 108 lettuces over six weeks. Copper tape, eggshells, grit, bark and wool did not reduce damage compared with no barrier. About 5.7% of leaf was eaten in the ground and about 0.2% in pots. One lettuce trial is not proof that copper never works on your bench. Collars were not that trial. If your plants are in pots, that gap is the larger fact. The job split sits on the slug control buying guide.
HanYun HanYun 12 pack collars, 21 cm

Testsieger

HanYun HanYun 12 pack collars, 21 cm
8.2/10about £12.99
View offer

What these listings add

kanta is £3.99, 20 mm, 4.1 from 221, length not printed. Some tomato pots and dahlias were left alone. Many of the first 50 reviews describe peel, tarnish, slime over the tape, or a snail sitting on it. HanYun at £12.99 is 4.9 from 7, size agreed at 21 cm by 12 cm. KAHEIGN at the same price is 4.4 from 32, with three sizes and doubt about the lip. A collar does not dose a bed. Tiger Tape’s 4.0 from 39 is decking text, not slug evidence.

When to pick which

Use the pellet when damage runs across a bed, you accept a pesticide, and you will scatter at the label rate. It is the wrong pick if you follow the RHS line, or if mice already raid the boards. Use a barrier when the plant still fits a collar, or when the plant is in a pot and you will keep the rim free of bridges. You trade a weaker public evidence base for not putting bait down. Nematodes are not in this basket, and they are weak against snails on leaves. For one pot, start with the rim. Fitting is on how to use slug pellets and collars.

Common questions

Do organic pellets still count as a pesticide?
Yes. OF&G on Provanto is an inputs mark. The bullets still say the pellets kill slugs and snails. The RHS groups organic pellets with the ones it tells you not to use. Store them away from children and dogs. The active is not on the amazon technical table for this ASIN.
Why does RHS say no pellets if Which? had good results?
They answer different questions. The RHS gives wildlife-first advice and says not to use pellets. Which? reports good ferric phosphate results and still says scatter thinly. Which? did not test this Provanto tub. You can follow the RHS and buy no bait. You can follow a large review file and the label. You cannot claim both sources endorse the same purchase.
Did copper tape work in the RHS lettuce trial?
Not in that trial. Copper tape, eggshells, grit, bark and wool did not reduce lettuce damage versus no barrier. The Guardian report gives about 5.7% of leaf eaten in the ground and about 0.2% in pots, over six weeks and 108 lettuces. The RHS leaves room for other sites. It does not support the slogan on a tape packet.
Why do some amazon reviews say the tape worked?
Because some buyers saw clean plants. kanta reviews include tomato pots and dahlias left alone, and one double layer. The same file includes trails and snails on the tape. One pot in one season does not cancel Wisley, and Wisley does not erase a pot that stayed clean. Decide which failure you can live with.
Can a collar do what pellets do across a whole bed?
No. A collar covers one plant inside roughly 15–26 cm, depending on which figure you trust. Forty lettuces need forty rings, and the rings fail when leaves bridge them. Pellets can be scattered on bare soil between plants. They bring mice, rain and the pesticide question a ring does not.
What about mice eating the bait?
It is a repeated complaint in the first 50 UK reviews on Provanto. You lose the dose and you feed the mice. Mould in a cold frame is in that sample too. If you already see droppings along the boards, a barrier on the plants you care about is the more honest spend. Do not heap extra pellets to outpace them.
If you want neither, what is left in this basket?
Beer traps, if you will empty them. Titifeya is three boxes at £8.99 and beer is not included. Nematodes are the usual third suggestion in RHS advice, and no nematode pack is among these twelve listings. They are for slugs in moist soil, not snails on leaves. Living with some damage is also an RHS position.

Related pages

Slug protection for hostas in pots

Snail protection

Best slug and snail killer: one job, not every bed

Slug control buying guide: pellets, rings and tape

How to use slug pellets and collars in wet UK weeks

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these twelve listings. Last checked 19 October 2026.

  1. GOV.UK, outdoor metaldehyde announcement (retrieved 19 October 2026)
  2. Defra media blog, metaldehyde ban (retrieved 19 October 2026)
  3. HSE, pesticides in the garden and home (retrieved 19 October 2026)
  4. RHS, slugs and snails (retrieved 19 October 2026)
  5. RHS, barrier trial write-up (retrieved 19 October 2026)
  6. AHDB, chemical and biological control of slugs (retrieved 19 October 2026)
  7. Which?, how to get rid of slugs and snails (retrieved 19 October 2026)
  8. Dobbies, Protect Garden Slug Killer Max 800 g (retrieved 19 October 2026)