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Troubleshooting Flocculation

Research has shown that in some low pH (acidic) sprayer solutions, glyphosate and tribenuron containing sulfonylurea (SU) products can form a flocculent, resulting in a tank mix to fall out of solution.

Steps for FlocculationCauses of Flocculation

  • Not pre-dissolving the SU.
  • Pre-dissolving the SU product too quickly with too little water (< 2 minutes).
  • Using cold water temperatures during the agitation process.
  • Inadequately performing agitation to create a see-through solution.
  • NGP municipal waters that are balanced to 7.0 pH.
  • Adding glyphosate to the spray tank before pre-dissolving SU.
  • Topping up the spray tank with more products without properly diluting the solution with water first.

If Flocculation Occurs – 3 Steps To Properly Clean Out The Sprayer

Step #1: Immediately clean out flocculation by adding 7% ammonia into the tank at a starting rate of 1% v/v. The hour-long process will continue agitating as ammonia is added until the recirculating liquid becomes clear.

Step #2: To finish cleaning the sprayer, mix up a load of 50-100 gallons of clean water with ammonia at a starting rate of 1% v/v and circulate through the system.

Step #3: Let the system charge overnight, clean excess deposits and rinse clean in the morning.













Always read and follow all label directions, precautions and restrictions for use. FMC and the FMC logo are trademarks of FMC Corporation or an affiliate. ©2022 FMC Corporation. All rights reserved. 22-FMC-3286 04/22