Leatherjackets are the larvae of crane flies (commonly known as daddy longlegs). They live in the soil and feed on grass roots and stems, which can lead to patchy, thinning turf and reduced plant vigour. Damage is most commonly seen in lawns, sports turf and amenity grassland. Large populations can cause significant turf damage and may also attract birds and other animals that feed on the larvae.

• Look for patchy, thinning turf or areas of grass that can be easily pulled away from the soil
• Inspect the soil beneath affected areas for grey-brown, legless larvae feeding on roots
• Monitor turf regularly during late summer and autumn, when larvae are developing in the soil
• Watch for increased bird activity, which can indicate the presence of leatherjackets

Regular inspection helps detect infestations early before serious turf damage occurs.

Leatherjackets can be controlled using entomopathogenic nematodes applied to the soil, which infect and kill the larvae. Applying biological controls at the appropriate time and maintaining regular monitoring helps reduce larval populations and protect turf health.