When you spend all of your spare time working on your prized lawn it is very irritating or even stressful when the condition suffers due to factors that are seemingly out of your control.
It is all very well adopting a strict but sympathetic cutting regime or a systematic and rigid feeding program, but if the roots of your lawn are being attacked from beneath then all of these efforts may well be for nothing.
In late summer, the Crane fly or Daddy Long Legs will be laying their eggs into the surface of the lawn. Two weeks later, the eggs hatch and the larvae start to feed on the nice succulent roots of your lawn.
The larvae are easily controlled with chemicals. However, not everyone is happy to use insecticides and to be honest, there are very little alternatives other than using Nematodes.
Nematodes are very tiny worms, that when released into the soil surface, they enter into the larvae through body orifices and reproduce. The larvae are disabled by bacteria that is released by the Nematode, stop feeding and then die.
You can use Nematodes to control Chafer Grubs in exactly the same way.