In WET pesticide products, the concentration of active ingredient is described as what?

• A. Pounds per liter
• B. Grams per liter
• C. Ounces per gallon
• D. Pounds, per gallon

Answer: (D)

In wettable pesticide products, the concentration of the active ingredient is given as pounds of active per gallon of product. This unit directly ties to how you apply the product: you mix a certain number of gallons of spray per acre, so knowing how many pounds of ai are in each gallon lets you determine the total ai delivered per acre by simple multiplication (gallons of spray per acre × pounds ai per gallon).

For example, if a product has 2 pounds of active per gallon and you spray 20 gallons per acre, you’re delivering 40 pounds of active per acre (20 × 2). Conversely, if you need 1 pound of active per acre, you would apply 0.5 gallon per acre (1 ÷ 2 = 0.5). This per-gallon concentration is the standard way liquid formulations express how much active ingredient is present. Other units like pounds per liter, grams per liter, or ounces per gallon aren’t the usual labeling convention for these US liquid products.