The Spanish slug, or Arion vulgaris, eats not only plants but dog excrement, dead animals and its own kind, and its "aggressive breeding cycle" means numbers can multiply quickly, says the BBC.

It’s just a case of reining it back a bit.” 5. Keep an eye on veg The blue-black soil slug (Arion hortensis) can be a nuisance to gardeners in autumn as it will attack crops of carrots and ...

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