Insects play an essential role in the planet. David Attenborough once said the world’s ecosystems would collapse if all the bees, wasps, ants, flies and others were to disappear

Creating a diverse ecosystem encourages natural predators to thrive and keeps aphid populations in check

As gardeners continue to veer towards organic solutions to pest problems, Hannah Stephenson looks at nematodes and how they go some way to tackling difficult pests such as vine weevil and slugs.