Your grow area should be kept clean and free of debris which could provide a hiding place for crickets.
Keeping a supply of organic soil with beneficial nematodes will help keep pests from laying eggs and reproducing.
There are also multiple species of nematodes that will prey on mole-crickets throughout their life cycle.
Cricket infestations can be prevented by mounting a net around the perimeter of your grow area, as well as using sticky traps to attract them before they get to the garden area.
Organic solutions such as neem oil and spinosad can be used to kill adults as well as juveniles. These control methods can be applied directly to the soil to kill larvae and kill them as they hatch, as well as on plants, or directly onto the insect itself.