How do I use Aphidius colemani to control aphid in glasshouse?

Release Aphidius colemani as a biological control agent. Typical rate: 0.25–1 wasp/m²; higher in hotspots. Repeat Introduce weekly while colonies present. Best performance is usually between 12–28°C.

How do I use Aphidius ervi to control aphid in glasshouse?

Release Aphidius ervi as a biological control agent. Typical rate: 0.25–1 wasp/m². Repeat Weekly or bi-weekly depending on pressure. Best performance is usually between 12–28°C.

How do I use Aphidoletes aphidimyza to control aphid in glasshouse?

Release Aphidoletes aphidimyza as a biological control agent. Typical rate: 0.5–2 adults/m². Repeat Repeat every 1–2 weeks while hotspots remain. Best performance is usually between 16–30°C.

How do I use Colemani + Ervi + Aphelinus mix to control aphid in tunnel?

Release Colemani + Ervi + Aphelinus mix as a biological control agent. Typical rate: 1–2 mummies/m². Repeat Repeat every 7–14 days. Best performance is usually between 12–28°C.

How do I use Adalia bipunctata to control aphid in outdoor?

Release Adalia bipunctata as a biological control agent. Typical rate: 5–10 larvae per infested plant. Repeat Repeat after 2–3 weeks. Best performance is usually between 14–26°C.

Aphid

Biocontrol strategies using ladybirds, parasitoids and mixes.

Aphids cause rapid distortion and honeydew contamination. Biological control uses predators and parasitoids…

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About Aphids

Aphids are one of the most persistent pests in UK horticulture, attacking soft tissue on vegetables, ornamentals and protected crops. They reproduce extremely fast, causing curling, distortion, honeydew and sooty mould. Many species also transmit damaging plant viruses, making early intervention critical.

Symptoms of Aphid Damage

Leaf curling and twisted new growth
Sticky honeydew on leaves and surfaces
Sooty mould development
Stunted plants and reduced vigour
Presence of shed aphid skins (“white dust”)

Why Biological Control Works

Aphids are ideal candidates for biological control because they form clusters that predators and parasitoids can target efficiently. Beneficial insects such as Aphidius colemani, Aphidius ervi, lacewings and ladybirds are highly effective when released early in the crop cycle. Once established, these natural enemies provide continuous suppression with no residue issues.

Common UK Aphid Species

Myzus persicae (Green peach aphid)
Aphis gossypii (Melon aphid)
Macrosiphum rosae (Rose aphid)
Aphis fabae (Black bean aphid)
Aulacorthum solani (Foxglove aphid)

IPM Recommendations

Introduce parasitoids preventatively before numbers build
Use banker plants to maintain Aphidius populations
Maintain moderate humidity and good airflow
Monitor leaves twice weekly for live colonies and mummies
Avoid broad-spectrum insecticides that disrupt beneficials

Preventative vs Curative Strategy

Preventative: Small weekly introductions of Aphidius species to build a stable background population.

Curative: Add lacewings, ladybirds or Aphidoletes when hotspots appear, especially in warm conditions.

Biological Controls for Aphid

The species below are examples of beneficial organisms commonly used against aphid. Recommendations are based on published biological control information and practical IPM experience. Always confirm suitability for your crop, growing system and local conditions before use.