Aphids – Sticky Trap Guide

Aphids, also known as greenfly, blackfly, or plant lice, are soft-bodied insects that cluster on plant stems, buds, and leaf undersides. These sap-sucking pests come in many colours (green, black, yellow, pink) and can quickly overwhelm plants, spreading disease and attracting ants with their sugary honeydew. In greenhouses, gardens, and indoor grow setups, aphids are a persistent and damaging problem if not tackled early.

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How to Identify Aphid Problems

Clusters of small, soft-bodied insects on shoots and leaves

Curled or distorted new leaves and buds

Sticky honeydew on leaves or surfaces

Sooty mould developing on honeydew

Presence of ants farming aphids for honeydew

Stunted plant growth and general decline


Aphids multiply rapidly in warm, sheltered environments — making them common in greenhouses, tunnels, houseplants, and outdoor crops during warmer months.

How Sticky Traps Help with Aphids

Sticky traps aren’t just for flying insects — they also help with aphids. While most aphids live on plants, winged aphids (alates) are responsible for spreading infestations. These flying forms are highly attracted to yellow sticky traps, where they become trapped and removed from the breeding cycle.

Benefits:


Catches winged aphids, stopping the spread to new plants

Monitors population and flight activity

Supports broader control efforts

Place traps vertically and within the plant canopy, where winged aphids tend to land. Use in greenhouses, on indoor plants, and in high-risk outdoor areas.

Combine with insecticidal soap sprays or biological controls like ladybirds and parasitic wasps (Aphidius colemani) for full effect.

Aphid Control: Best Practices

Introduce beneficial insects like ladybirds or lacewings

Spray with horticultural soap or neem oil

Remove heavily infested plant tips

Use yellow sticky traps to catch winged aphids

Avoid over-fertilising with nitrogen — it encourages soft, aphid-prone growth

Sticky traps work best as a monitoring and prevention tool — catching winged migrants before they can colonise new plants.

FAQ - Aphids

What attracts aphids?

Aphids are attracted to lush, soft growth, often caused by over-fertilisation. Winged aphids are drawn to the yellow hue of sticky traps, mistaking it for foliage.

Are sticky traps enough to control aphids?

Sticky traps help prevent the spread of infestations by catching flying aphids, but they won’t remove existing colonies. Use in combination with sprays or biocontrols for best results.

Do aphids harm plants?

Yes — aphids suck sap from stems and leaves, causing stunted growth, leaf curl, and virus transmission. Honeydew also encourages sooty mould.

Where should I place sticky traps for aphids?

Place traps vertically within the plant canopy, or near susceptible crops in greenhouses and indoor grow areas. Monitor regularly and replace when full.

Are sticky traps safe to use around pets or children?

Yes. StickyTraps.co.uk traps are non-toxic, scent-free, and safe for indoor use. Just keep them away from beneficial insect release zones.

An Ode to Aphids

Oh pale-winged pest on verdant leaf,
You flit about and cause much grief.
You pierce and sip, then leave behind,
A sticky gift, of the unwelcome kind.

Oh, aphid, tiny garden thief,
You cluster close on stem and leaf.
You drain the sap, you curl the green,
You call the ants — a sticky scene.

You come in black, or green, or white,
And hide in buds and out of sight.
You spread with wings from plant to plant,
A viral gift, a gardener’s rant.

But here’s a trap — so bright, so bold,
A sheet of yellow, brave and cold.
You land, you stick, your journey ends,
No more shall you destroy my friends.

Rest now, louse of leaf and bloom,
You met your match — a sticky tomb.