Curl grubs are common pests of lawns during mid-spring and into summer. They are creamy white or grey grubs, around 2–3cm long with a brown head and a dark grey to black bottom. When disturbed they curl into a C shape. They damage the lawn by eating the roots, just below the soil surface.
Curl grubs are the larvae of beetles like African black beetle, which are small, shiny black beetles. Adult African black beetles can start to become active in late winter, before laying their eggs (which turn into curl grubs) in spring, so controlling the beetles before they have a chance to lay their eggs will help prevent damaging curl grubs later on. An application of Baythroid® Advanced Insect Killer for Lawns in late winter will help control the adult African black beetle, before it has had a chance to lay eggs, helping to break the curl grub life cycle and protect the lawn from damage.