Is the Harlequin Ladybird an invasive species?

The interloper is the harlequin ladybird (Harmonia axyridis), one of the world’s most invasive insects. From its homelands in central Asia, H. axyridis was introduced to Europe and North America to control aphids.

How do I identify my Harmonia axyridis?

Harmonia axyridis is a typical coccinellid beetle in shape and structure, being domed and having a “smooth” transition between its elytra (wing coverings), pronotum, and head. It ranges from 5.5–8.5mm in size. The common color form, f. succinea, is orange or red in colouration with 0–22 black spots of variable size.

Why are Harlequin ladybirds a problem?

How do they affect me? This invasive non-native species of ladybird has the potential to seriously affect many of the native British species such as the two spot or seven spot ladybirds. However Harlequin ladybirds chiefly eat aphids they are a potential benefit to gardener and farmer alike.

Is Harlequin Ladybird good?

As with many other ladybirds, harlequin ladybird primarily feeds on aphids and so can be considered a useful addition to garden insect fauna.

Where can I find Harmonia axyridis in the wild?

Harmonia axyridis can be found on many crop species on farm lands where it has been introduced. It is often found on deciduous trees, flowering plants, and other plant species found in open areas. This species tends to live in open fields, agricultural fields, and meadows.

Is the Harmonia axyridis a biological control agent?

Harmonia axyridis (harlequin ladybird); two larvae feeding on a Coccinella septempunctata (7-spot ladybird) larva. H. axyridis, a species of Asian origin, has been used as a biological control agent against aphids worldwide.

How big is an adult Harmonia axyridis beetle?

Harmonia axyridis (harlequin ladybird); adult. The beetles are 5-8mm long and 4-6.5mm wide. The body is moderately convex, shortened, oval and approximately 4/5 wide as long.

Is the harlequin ladybird invasive in Ecuador?

Harmonia axyridis is a ladybird extensively used around the world for biological control of agricultural pests. However, it has become invasive in several countries, producing negative ecological and socio-economic impacts. Herein, we review the invasion history of the Harlequin Ladybird Harmonia axyridis (Pallas, 1773) in Ecuador.