You are treating a turf area for bluegrass billbug. You are using a granular insecticide with a labeled rate of 6 pounds per 1000 square feet. The turf area is 150 feet by 600 feet. Approximately how much insecticide do you need to treat the total area?

• A. 300 pounds
• B. 360 pounds
• C. 540 pounds
• D. 1080 pounds

Answer: (C)

When applying a rate per area, multiply the rate by how many thousands of square feet are in the total area. The turf area is 150 ft by 600 ft, which equals 90,000 square feet. The label calls for 6 pounds per 1,000 square feet, so for 90,000 square feet you need 90 × 6 = 540 pounds. Therefore you’d use about 540 pounds of insecticide. The other options correspond to different total areas, not the 90,000 ft² you’ve got.