Posted: 28/07/2012 at 21:06
Certainly the blue tinge of the plants is one of the symptoms. Have you seen the creatures? They are like white wireworms or centipedes.
The trouble is that there does not seem to be a treatment for them except turning the soil over and allowing it to freeze. They do not like the cold.
Have you tried getting in touch with Rowlawn at www.rolawndirect.co.uk. They might be able to make some suggestions.
You could also try the stuff used to kill Funngus gnats, Or I have seen Neem oil suggested.
Best of luck!