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Debra from Miami Florida writes,

My irrigation system come on 3 x per week and stay on for 45 minutes, will it wash away Viper Insecticide that...

I spray around the perimeter of my house and near the foundation? How many times would I have to reapply because of my irrigation system?


Viper Insecticide is rain/irrigation fast after it has dried completely. As long as your product has time to dry, it is fine and the residual will be around 30 days outdoors.

Answer last updated on: 03/27/2015

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