I tried to control and infestation of Chafer beetle grubs with 30Lbs over a 2000 sq ft lawn. this was ineffective and now have to sit back and watch the crows and raccoons destroy my lawn.
Expert response: Sevin is labeled for Japanese beetle grubs, but not chafer beetle grubs specifically. For subsurface pests, Sevin granules must be watered in immediately and will only kill the pests contacted directly at the time of application. You will need to apply when the pests are actively feeding near the surface. For long term grub control applied in spring or fall, we would recommend Merit Granules with imidacloprid: http://www.domyownpestcontrol.com/merit-granules-30-lb-bag-p-301.html