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Leatherleaf slugs

Flat gray brown slugs feed at night and chew holes into ripening berries and leaves, leaving shiny slime trails.

Veronicellidae (leatherleaf slugs) Snail Fact sheet
A leatherleaf slug (Veronicellidae), the flat, leathery slug of farms and gardens
Photo: Harendra Srivastava, CC0, via Wikimedia Commons

Crops it attacks

Where the damage shows

On fruits, pods or nutsOn the leaves

When to act

Twice a week, check the beds at night with a flashlight. Act when you find slugs on more than 1 in 10 plants or fresh feeding on the berries.

What to spray

Active ingredients only, never brands. The IRAC group tells how it works: switch to a different group next time, so the pest does not learn to survive it. Spray only when the damage is worth the cost, and only with products registered with the Fertilizer and Pesticide Authority for your crop. Follow the label. The Shopee and Lazada links only show who sells something with that active ingredient, not a recommendation of any seller or product.

Sprays do not reach them; pick slugs by hand at night, keep weeds and old leaves off the beds, and keep berries off the wet soil with mulch.

How to prevent it

  • Pick slugs by hand at night and drop them in salty or soapy water.
  • Keep weeds, old leaves and runners off the beds. Slugs hide under them by day.
  • Mulch with plastic or dry straw so the berries stay off the wet soil.
  • Raise the beds and improve drainage so the soil surface dries out.
  • Lay boards or wet sacks between rows. Collect the slugs hiding under them each morning.

Natural enemies and biological help

  • Ducks or chickens let in between crops eat many slugs. Ground beetles and firefly larvae prey on them too.

Where this comes from

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