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Ruth writes,

Our church has a gravel parking lot in AZ. What pre emergent can we use to prevent tumbleweeds from coming?


Casoron Herbicide will be a good choice to control Russian thistle (aka tumbleweed). Treating gravel lots can be tough because it is hard to contact the soil and the soil is usually very dry. To help get the Casoron granules to the soil you must heavily irrigate the area after the application. Casoron is a mild soil sterilant, so it is very important not to put it in areas where it will contact desirable plants or in areas where you will soon want to grow new plants.

Answer last updated on: 02/28/2011

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