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Mike from Langhorne writes

I applied Prime Source Meso 4SC Select Herbicide at 10am and then it rained later that evening around 7pm, will it still be effective?

Answer:

Ideally, the product label suggest 24 hrs with no rainfall or irrigation. As long as the application of Prime Source Meso 4SC Select (Generic Tenacity Herbicide) has had time to completely dry and it was light to medium rainfall where no runoff occurred, your application should be fine. 

Answer last updated on: 08/31/2022

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Prime Source Meso 4SC Select Herbicide

Prime Source Meso 4SC Select Herbicide

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