Grubs and other listed insects can do extensive damage to lawns turning infected turf brown. Prevent grubs from damaging your lawn with Scotts? GrubEx?I Season Long Grub Killer. A single application can kill and prevent grubs for up to 4 months. It will also provide protection from sod webworms chinch bugs May/June beetles Green June beetles and other insects (as listed). Using Scotts? GrubEx?I Season Long Grub Killer annually can also help control Japanese beetle infestations. GrubEx? helps prevent root damage caused by insects feeding on grass and its roots. Applications should be made during spring or early summer to kill grubs as they develop. Easily apply with a Scotts? broadcast drop handheld or Wizz? spreader to a dry lawn and then water in thoroughly to activate. People and pets may re-enter the lawn after it has dried. Each 28.7 lb. bag of Scotts? GrubEx?I Season Long Grub Killer provides coverage for up to 10 000 sq. ft. of lawn.