Post category: Wireworms
Wireworms are hard, reddish or yellowish grubs about 1 centimetre long and feed on the roots of grass and weeds. The grubs are usually only a problem in new ground that has been broken out of old grassland, occasionally attacking the roots of new plants, including bedding plants.
Damage to potato tubers is common after old grass, the tubers tunnelled by wireworm grubs. In a lawn the damage is rarely significant. The larvae mature within three years of the old grassland being ploughed up and rarely appear in cultivated ground afterwards.