Scouting should begin in late May when adult beetles are first observed. Scout fields thoroughly for egg masses and flag the plants that have them. Be sure to look at the undersides of the leaves! Continue scouting for new egg masses, and observe the flagged plants for egg hatching. Foliar treatments should be initiated at 15 percent to 30 percent egg hatching. Depending on the treatment used, a second application may be necessary, so continue scouting for eggs, larvae and adults after foliar treatment.