Is there a biological warfare in your garden?

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.

Those of us who yearn to ditch the blue pellets and quick-fix chemical sprays in favour of more eco-friendly garden pest controls, should perhaps be taking a biological approach.

Many of us incorporate a variety of plants in our garden to attract beneficial predators such as ladybirds which will gobble up aphid eggs, or hedgehogs, song thrushes and frogs to feast on slugs and snails.