**State what is meant by the term ‘plant disease’. Describe the damage caused by plant diseases to include:

  • grey mould
  • strawberry powdery mildew
  • damping off
  • honey fungus
  • rose black spot
  • potato blight**

**- club root

  • hollyhock rust
  • apple and pear canker
  • fireblight
  • bacteria canker on Prunus
  • potato leaf curl virus (and vector peach potato aphid)
  • tobacco mosaic virus**

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