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How to use aphid killer

Updated: 22 October 2026

You already have a bottle from the comparison or a band still in the wrapper, and the aphids came back after the first go because the spray hit the top of the leaf or the band went on in the wrong month. How to use aphid killer in a UK garden is about wetting the insect, blocking the crawler, or hanging a monitor in the right place, not about mixing stronger than the label allows. The [Aphid killer comparison](/hub/pest-control/aphid-killer) table shows which ASIN you bought. Peter F. checked these listings on 20 October 2026. This is not a lab test. A qualifying purchase can earn a commission at no extra cost to you.

You already have a bottle from the comparison or a band still in the wrapper, and the aphids came back after the first go because the spray hit the top of the leaf or the band went on in the wrong month.

Our top picks

Provanto Provanto Smart Bug Killer, twin 1 L

Best overall

Provanto Provanto Smart Bug Killer, twin 1 L
9.4/10about £12.00
View offer
Seedzbox Seedzbox glue bands, pack of 2

Alternative

Seedzbox Seedzbox glue bands, pack of 2
8.8/10about £11.99
View offer
Growth Technology Ltd SB Plant Invigorator 500 ml

Best value

Growth Technology Ltd SB Plant Invigorator 500 ml
8.4/10about £8.53
View offer
On this page
  1. 1.Before you spray
  2. 2.How to spray the bottles in this set
  3. 3.If the leaves have already curled
  4. 4.How to fit a grease band
  5. 5.What the yellow cards are for
  6. 6.When to stop and get help

Before you spray

Identify aphids on soft growth, buds, and especially leaf undersides. The RHS suggests squashing small numbers and waiting for predators on healthy plants before you reach for biocides. If the plant is in flower and bees are foraging, do not spray open blooms; HSE garden guidance treats bee exposure seriously. Patch-test a few leaves on sensitive houseplants when the label allows, as thyme and other herbs have curled in SB reviews before pests dropped. Read the statutory label on the bottle you hold, not only the amazon bullets. Provanto Smart label text on retailer grocery pages for the ready-to-use line says wet both sides but not to run-off, spray morning or evening, avoid bright sun and dry roots, and space repeat sprays only within 7–10 days where permitted. Apples may allow only one spray and not before flowering. The twin-pack listing does not replace that label. Ultimate listing claims ready-to-use contact with a twist-and-lock nozzle and up to 2 weeks; one reviewer still resprayed when a few bugs remained. Harvest waits for food crops are on aphid killer for vegetables.

How to spray the bottles in this set

For SB Plant Invigorator and insecticidal soap, the supplier aphid page for SB describes wetting both leaf sides to run-off, heavy infestations every two to three days, then weekly until pressure drops. Aphids that dry before they are fully trapped can recover; that is why a single top-side mist fails on mint in reviews. The 500 ml amazon bottle is ready to use; do not dilute it like the 10 ml per litre concentrate rate meant for a different pack. Stand so you can see undersides on beans, roses, and brassicas. Morning or evening reduces scorch on hot days. Reapply when the label or product type demands: soap and SB are re-wet products with no residual after drying. Smart’s minimum interval comes from the label table, not a weekly habit with no end. Do not exceed application caps printed for your crop. Store SB upright if caps have leaked in comments.
Provanto Provanto Smart Bug Killer, twin 1 L

Testsieger

Provanto Provanto Smart Bug Killer, twin 1 L
9.4/10about £12.00
View offer

If the leaves have already curled

Contact sprays and soaps cannot kill aphids they never touch. Peach-potato and other aphids hide inside curled leaves early; that is when a systemic product may help later feeding only if the label allows that plant. It is not permission to spray flowers. Do not increase concentration beyond the label to reach inside; that risks plant damage without legal cover.

How to fit a grease band

Seedzbox instructions in the listing say fit at 45–60 cm above soil, sticky side out, with string in the middle, for winter moth October to April and ants May to August on the seller card, and replace after six months. RHS grease-band guidance emphasises late October application, about 45 cm up, sticky side out, include the stake, keep until April, and note that fissured bark lets crawlers under. RHS also warns bands are not strong enough to trap birds, bats, or mice; check non-target catch. A band on a cherry stopped ants farming aphids on the trunk in one review; it did not clear aphids already on shoots. Remove bands when the season ends and replace on schedule. A band left up all year against RHS timing is a common failure mode.

What the yellow cards are for

Hang BestTrap cards with twist ties near houseplants, greenhouse benches, or windows to catch winged aphids and other flying insects. The glue is insecticide-free. Cards do not replace spraying wingless colonies on stems; an allotment review still had aphids on plants after cards filled. RHS notes yellow sheets monitor whitefly and can catch parasitoid wasps too. Use cards to decide whether flyer pressure is rising, then treat foliage separately.

When to stop and get help

Stop escalating if the label’s maximum applications are used, the plant is declining despite treatment, or you cannot identify the pest. Seek medical advice if someone is harmed by a product. Professional help may be appropriate for repeated crop loss on a commercial scale; amateur labels in this set are for garden use under HSE amateur rules.

Common questions

Where do I spray?
Undersides and stems where aphids cluster, both sides to run-off for SB-style physical sprays, within label limits on sun, roots, and flowers.
How often for a soap or SB?
Heavy spells every two to three days, then weekly for SB per manufacturer aphid guidance; the soap listing says reapply as needed after drying.
How do I fit the Seedzbox band?
45–60 cm, sticky side out, string centred, stake included in RHS-style fitting, and the seller moth and ant windows as on the card.
When do I take the band off?
Replace after six months per Seedzbox. RHS moth band season runs to April unless your label says otherwise.
Do yellow cards replace spraying?
No. They monitor flyers; wingless aphids on growth need another tool.
What if the leaves are already curled shut?
Contact products miss them. Consider a label-allowed systemic route on systemic vs contact aphid spray, not a stronger mix.
When do I stop and get help?
At label limits, unclear identity, illness from exposure, or crop failure despite correct use.

Related pages

Aphid killer buying guide

Aphid killer

Best aphid spray UK: which listing fits your plants

Aphid killer for vegetables: harvest days on the label

Systemic vs contact aphid spray: 8 weeks or 2 weeks

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these eight listings on 20 October 2026. Last checked 22 October 2026.

  1. RHS, Aphids (retrieved 20 October 2026)
  2. HSE, garden and allotment pesticide use (retrieved 20 October 2026)
  3. HSE garden pesticide search (retrieved 20 October 2026)
  4. GOV.UK, action to protect bees from pesticides (retrieved 20 October 2026)
  5. RHS, grease bands and tree barrier glues (retrieved 20 October 2026)
  6. RHS, glasshouse whitefly (retrieved 20 October 2026)
  7. Tesco, Provanto Smart Bug Killer label text (retrieved 20 October 2026)
  8. Ashwood Nurseries, Provanto Ultimate Bug Killer (retrieved 20 October 2026)