each tunnel to see which ones are reopened. The re-opened ones are active tunnels, which is where you want to place your trap. If there is no catch within a day or two, move to a new location and reset the trap.
Using insecticides to reduce food supply (the soil insect population) is also an option. The best time to control grubs is when they are actively feeding close to the soil surface in late sumer and early fall. After applying the soil insecticide, don’t expect mores to leave the area immediately, it may take a short while. Also, keep in mind that insecticides will kill most soil insects—good and/bad. For a fact sheet on grub control, contact your local Cooperate Extension office for fact sheets on Home, Yard, and Garden, or Lawn Insects and Their Control, or go to the website: http://ag.udel.edu/extension/horticulture/pdf/ent/ent-17.pdf Read and follow all label directions.