One bag covers up to 14,200 square feet. This 21-0-4 fertilizer contains MERIT insecticide that controls many root-feeding grubs including Japanese beetle, June beetle, white grub and many more. Use for fertilization AND insect control in turfgrass, landscape ornamentals and sod farms. Multiple use rates allow targeting of specific insects; high uniformity precision blend for accurate spreading. 50% of total nitrogen is derived from NS-54 slow-release nitrogen. Active ingredient: Imidacloprid (0.2%). Low rate application: 50 lbs per 14,200 sq ft. High rate application: 50 lbs per 11,100 sq ft. 50 lb bag.