BBC Gardeners' World

Problem solving

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  Pear leaf blister mite

  Yellow, red or green blisters on pear tree leaves.

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  Pear wasp damage

  Pears on trees display holes, often with wasps still inside.

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  Powdery mildew

  A white powder coating covers the leaves of shrubs.

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  Raspberry nutrient deficiency

  Failing raspberry plants.

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  Red spider mite

  Fine webbing on leaves of indoor and outdoor plants.

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  Rust

  Rust-coloured pustules on underside of plant leaves.

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  Scale insects

  Scale insects on leaves of indoor and outdoor plants.

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  Slugs

  Holes chewed in soft, new growth of plants.