If you’re looking for a sustainable way to control garden pests, delve into this episode on the weird and wonderful world of biological controls. RHS expert entomologist Andy Salisbury explores the fascinating history of how certain bugs and beasties were introduced as pest controls (with many successes... and some disasters), and food and nature writer Eugenia Bone explains how fungi have a potentially vital role.

Plus, RHS scientist Magdelena Boshoff explains how to successfully apply nematodes to control pests in your garden.