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Nimblewill and Crabgrass Post Emergent Treatment - Rain

I want to do Post-Emergent Treatment of Nimblewill and Crabgrass cool season turf with mix of KYB, Fesue and Rye. What is the amount of time the Tenacity should dry before rain or irrigation? Should it be irrigated for Post-Emergent treatment? The overall area to be treated is 4300 sq ft. The weeds are dense in a 1600 sq ft area and then sparse (spot treat) through the rest of the turf . Is the dense weed area considered spot treatment, so that 1/2 tsp per gallon or is it consider large area treatment using the higher rate of 1 tsp per gallon ?


After treating with Tenacity you want the product to have at least 6 hours of dry time before any rain or irrigation occurs. You do not want/need to water after a post emergent application. We recommend using the spot treatment rate of Tenacity in the dense areas so as to not cause damage to your lawn. Tenacity is known due to its power to even with an accurate application to sometimes temporarily whiten the turf surrounding the weed areas. The color will normally return within 3-4 weeks so to minimize the chance of turf discoloration you will want to use the lower dose at first and be cautious to not overlap or too heavily apply the product. Please let us kow if you have any other questions.

Answer last updated on: 08/14/2013

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