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2019-08-01

Spanish slugs: Moscow alarm over giant invasive pests

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Giant orange slugs up to 15cm (6in) long are causing alarm in central Moscow - the latest place they have turned up since spreading from Spain.

The Arion vulgaris slugs are monsters compared with most other slugs and are serious pests, capable of ravaging vegetable plots.

A species monitoring website, EU-backed DAISIE, lists the slug among the 100 worst invasive pests in Europe.

Russia's TV news programme Vesti found horrified reactions among Muscovites.

Monday's report quoted one local resident, Abdula Tashibekov, as saying: "They eat an awful lot, and it's really hard to get rid of them; I've battled against them, but they just keep multiplying".

Arion vulgaris is sometimes called Arion lusitanicus, or simply the Spanish slug. It can also be reddish-brown or yellow.

It is a hermaphrodite, meaning each slug carries both male and female sex cells, so it can mate with any Arion partner it finds, and that increases the risk of infestation. One slug can produce up to 400 eggs at a time.

Not only is it a voracious plant-eater, it can also spread plant parasites and nematode worms, which can harm domestic pets.

Native to the Iberian Peninsula, the slug was first reported in France in 1956, and quickly spread north across Europe. Sales of plants across Europe are believed to have spread the slug's eggs widely.

It is common in the UK, and in recent years it has been found in parts of Russia, but now it has reached Tverskaya Street, barely a slime trail away from the Kremlin.

A Russian translator with the Twitter handle @NamShabOfEnki tweeted: "Central Moscow, 15 minutes' walk from the Kremlin. A gigantic slug the size of a little kitten. It hid under the dishes, sheltering from the rain. The cats didn't mind, they were lying next to it. GIGANTIC!!!"

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