The following question was sent to the P&PDL diagnosticians here at Purdue University:

Question: I have a rural lawn and pasture that is infested with Horsetail (Equisetum). Can I spray something to kill it without killing the grass or should I just cut my losses and kill it all? Do you have any recommendations as to what I should use for this application?

Answer: About the only thing that will kill this weed is Roundup applied at 3 to 4 qt/acre and then repeat the application later. This will kill EVERTYTHING.

Horsetail does not like tillage. Therefore, the easiest thing to do is to till the pasture and re-seed.

--Tom Jordan (April 30, 1999)

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