TANK MIXING: WALES METHOD
Wettable powers and water dispersible granules
Agitate tank mix thoroughly
Liquid flowables and suspensions
Emulsifiable concentrate formulations
Some herbicide labels list a specific mising sequence. In absence of specific directions, a recommended sequence for addiing pesticide formulations to a tank partially filled with water is the WALES method. Each ingredient must be uniformly mixed before adding the next component. For example, a soluble powder must be completely dissolved before adding the next component. Adjuvants are added in the same sequence as pesticides: ammonium sulfate is a soluble powder, oil adjuvants are emulsifiable concentrates and most surfactants are solutions. Within each group, usually add the pesticide before the adjuvant. For example, add a soluble-powder pesticide before ammonium sulfate.
Know the benefits and risks of tank mixing before you make an application. In some cases, compatibility of two or more chemicals is based on the order in which they are added to the tank mix. Tank mixing can lead to a variety of mishaps if not done correctly. Being aware of the benefits and risks while following the proper guidelines is critical to ensuring the success of any tank mix procedure and application.
This information is presented in good faith for your reference. Always read and follow product label directions before beginning to tank mix.