Merit 0.5 Granular Systemic Insect Control - 30 Pound Bag Target Pests: Grubs, Chinch Bugs, and other small turfgrass pests. See complete list on product label. Active Ingredient: Imidacloprid- 0.5% Size: 30 lb Yield: 60 to 80 lb. per acre or 1.4 to 1.8 lb. per 100 sq/ft. For Use in and around: For systemic insect control in turfgrass and landscape ornamentals.