BBC Gardeners' World

Problem solving

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  Blossom end rot

  Spots, turning into leathery dark brown areas on fruits.

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  Brambles

  Spreading thickets of thorny, woody growth.

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  Brown rot

  Brown spots and pustules on fruits of fruit trees.

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  Cabbage white caterpillars

  Holes in the leaves of brassicas and nasturtiums.

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  Canker

  Trees with sunken bark and red or white pustules.

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  Canna virus

  Distorted canna leaves that feature pale spots.

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  Capsid bugs

  Small, brown-ringed holes on the leaves of many plants.

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  Carrot fly

  Brown rings on carrots, often followed by rotting.