BBC Gardeners' World

Problem solving

• 

  Acer tar spot

  Shiny black blotches with yellow outlines on acers.

• 

  Aphids

  Distorted, curled-up leaves on the new growth of plants.

• 

  Apple and pear scab

  Brown blotches on foliage and fruit of apples or pears.

• 

  Canker

  Trees with sunken bark and red or white pustules.

• 

  Capsid bugs

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

• 

  Cuckoo spit

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

• 

  Fungi

  Fungi or toadstools on lawns, often after wet weather.

• 

  Leaf miner fly

  Beige-coloured wiggly lines on leaves of plants.