What is the correct order to add pesticides to a spray tank when mixing more than one product?

• A. Wettables, Flowables, Water Solubles, ECs
• B. Flowables, Wettables, Water Solubles, ECs
• C. Wettables, Flowables, Water Solubles, ECs
• D. Wettables, Flowables, ECs, Water Solubles

Answer: (C)

Mixing multiple pesticide products is most reliable when you add them in a sequence that supports proper dispersion and dissolution. Wettables are dry powders that must be wetted and dispersed, so adding them first lets them break up and start to dissolve evenly. Next come Flowables, which are liquid suspensions; adding them after the wettables helps maintain a stable suspension rather than clumping with undissolved solids. Then add Water Solubles, which dissolve in water, so they can disperse completely without interference from partially dissolved materials. Finally, Emulsifiable Concentrates—oil-based formulations—are added last to minimize compatibility issues and prevent premature emulsification from affecting the other products. Following this order helps ensure each product works as intended and reduces the risk of poor mixing or precipitation. If you’re ever unsure, always follow the label directions and test compatibility before full-scale mixing.