RHS worst pest is box tree caterpillar

The list is based on the enquiries about pests received by the Royal Horticultural Society (RHS) entomology team in 2015, of which the box tree caterpillar accounted for 433 (17 per cent).

Slugs and snails were second in the list (122 enquiries) of the top 10 pests, followed by:

  • aphids
  • large cabbage white butterflies
  • vine weevil
  • cushion scale
  • lily beetle
  • rosemary beetle
  • fuchsia gall mite
  • woolly aphid

RHS head of plant health Gerard Clover said: "Dealing with pests and diseases is a reality for gardeners, but by sharing their observations, insights and samples with RHS scientists they are helping us identify those areas where we need to focus our research efforts to better control pests and diseases.

"We are currently undertaking research that we hope will mean that slugs and snails will become less of a problem in the future, as we work to determine the most effective ways of controlling them."

Meanwhile, honey fungus topped the list of worst garden diseases.

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