Onslaught is a great product for cricket control. You can also use a growth regulator such as Nyguard or Gentrol, however, this only works for crickets that are living and propogating on your property. Since Field Crickets are also avid flyers, they can migrate from other areas very easily. If this is the case, using a growth regulator won't do much good.
Larva Lur - a specially designed bait, is also very effective against crickets.