Leatherjacket larvae, if they are left un-treated, can cause severe damage to lawns and will then over winter deeper in the soil, ready to cause more damage the following spring. They cause lawns to develop yellow patches where the roots have been eaten by the grubs of the Leatherjacket. In severe cases the roots are completely destroyed and the turf can be pulled up easily to reveal no roots! Secondary damage from birds and animals is just as destructive, as they often dig up lawns looking for the grubs to eat.

Leatherjacket Killer should be applied after the Daddy Long legs or Crane flies have laid their eggs in the grass and these eggs have developed into the Leatherjacket Larvae. These Larvae are a grey-brown colour and normally appear between late August and early October, when they will be feeding on the roots of your grass.

Leatherjacket Killer is harmless to children and pets, plus there is no chemical alternative. Packs (small) contain 50 million nematodes, (large) contain 250 million nematodes.

The product must only be used between August and October.