Jim, We would recommend that you add glyphosate for the burndown. Sharpen and glyphosate seem to work really well together. Also, do not apply Sharpen with other products containing Group 14/Group E herbicides (such as sulfentrazone or flumioxazin - Valor) as a tank mix or sequential application within 30 days because crop injury may result. Here is some pictures of Sharpen and glyphosate that I just got.
 (Sharpen_ IL.jpg)
 (Sharpen_TN.jpg)
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 Sharpen_ IL.jpg (66KB - 68 downloads)
Sharpen_TN.jpg (83KB - 62 downloads)
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Sharpen
