Answer: I am unable to accept a scan, but thank you. Perhaps the most efficient approach would be to hand wipe the foliage of this plant with herbicide containing glyphosate being careful to avoid it contacting the vinca. This is a nonselective herbicide and would damage any vinca it came in contact with.
An alternative would be to dig and preserve some of the vinca, then spray the entire bed until you are sure the weed has been eradicated. Then, replant the vinca.
Whichever method, be sure to read and carefully follow all of the label instructions for best results.
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