Which value represents the typical amount of active ingredient per gallon in Emulsifiable Concentrate?

• A. 1.2 pounds
• B. 2.8 pounds
• C. 3.6 pounds
• D. 4.5 pounds

Answer: (B)

Emulsifiable concentrates are concentrated pesticides designed to be diluted with water before use, and the label lists how much active ingredient is in each gallon of concentrate. This concentration is relatively high so you can mix a precise amount into a spray volume to achieve the right application rate. A typical EC has about 2.8 pounds of active ingredient per gallon of concentrate, meaning every gallon contains 2.8 lb ai and you reach the target spray concentration by the label’s recommended dilution with water. For example, mixing 0.5 gallon of EC into 9.5 gallons of water to make 10 gallons of spray yields a total of 1.4 pounds of active ingredient in the 10 gallons, or 0.14 pounds ai per gallon of spray. Other values would indicate stronger or weaker concentrates and aren’t as representative of the common EC label strength.