Harlequin Ladybird

Harmonia axyridis

Harlequin Ladybird, Asian Ladybeetle, Multicoloured Asian, Harlequin, Harliquin Ladybug, Halloween Ladybeetle

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The harlequin ladybird, Harmonia axyridis, causes the most damage to fruit crops, especially grapes as they crawl inside the fruits to feed on them. If infected fruit is harvested, they are notably unpleasant in taste.
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Traits

Harlequin ladybirds are invasive, originating from Asia. They predate the larvae of native ladybird species and have contributed to their decline.
Can be used as an effective form of predatory biocontrol for many garden pest species.

Appearance

The harlequin ladybird is large, domed in shape and smooth. It grows to around 5.5-8.5mm in length and is commonly orange or red in colour with dark black spots, of which they can have up to 22. This species is one of the most variable in the world, with a huge range of colour forms observed. You can also find them with black with red or orange spots, but may only have 2-4 of these.

Symptoms

Ladybirds such as this one are often obvious to see on your plant leaves and fruits.

Activity

Diurnal

Personality

Order

Coleoptera

Family

Coccinellidae

Metamorphosis

Complete

Distribution

Originating from Eastern Asia in central Siberia, Kazakhstan, and Uzbekistan. It is also found across Japan, China, Tawiwan, Korea and Mongolia, throughout Russia to the Himalayas. Established in many locations worldwide, it is now present in the UK after first appearing in 2004. It may be commonly found across southern England into the Midlands.

Biological treatment

Harmonia axyridis is a voracious predator, this ladybird commonly feeds on aphids and scale insects. It may therefore be used as effective biocontrol for many plant pest species. It has been introduced to glasshouse, crop field and garden environments specifically for this reason.

Chemical treatment

Insecticides can be used to control these, as well as sticky traps and manually removing them from the affected areas. However these make a great control species for other more detrimental pests, they feed on aphids and scale insects, which do far more harm to your plants than ladybirds do!

Attracts

Attracted to dark screening materials that hold warmth.
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