BBC Gardeners' World

Problem solving

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  Cuckoo spit

  White froth on stems, leaves and buds of many plants.

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  Earwigs

  Large, ragged holes in young leaves and petals on plants.

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  Flea beetle

  Many holes on upper leaves of brassicas and ornamentals.

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  Leaf miner fly

  Beige-coloured wiggly lines on leaves of plants.

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  Leaf-cutter bees

  Round notches 'cut' from plant leaves, especially roses.

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  Leafhopper

  Yellow to whitish mottling of upper surface of leaves.

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  Leatherjackets

  Yellow or dead patches of grass. Also affects brassicas.

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  Lettuce grey mould

  Grey mould on lettuce leaves and slimy, rotting bases.