Treatment Plan

The need for spraying Japanese Beetle depends on the severity of infestation and associated reduction in leaf area from feeding. Mature vines with excess leaf area can tolerate moderate feeding. Productivity of young vines, especially, can be reduced from a severe infestation. I control is necessary, apply insecticide when beetles are present. Apply Drexel Carbaryl 4L at 1-2 qt/acre. Up to 5 applications per season are permitted with a minimum of 7 days between applications. 7 day PHI, 48 hr REI. Apply Assail 30 SG (East of Rocky Mountains only) at 2.5 to 5.3 oz per acre. Do not use more than once every 14 days, do not make more than 2 applications per season. Maximum seasonal rate is 10.6 oz. Do not use spray adjuvants with Assail. 3 day PHI, 12 hr REI.