My spouse's U.S. visa date of birth is different from her passport date of birth.
Would she be to travel and what date of birth should be on the ticket?
Her visa is invalid - if it doesn't match the passport that it is in then it is not valid.
It is possible that you will be able to enter the US with the incorrect visa, but it's also possible that you will have issues, up to or including not being allowed to board the flight to the US.
You should return to the consulate it was obtained from, and bring it to their attention. I have had a similar mistake made on a US visa (incorrect LCA expiry date), and it was fixed in a matter of minutes, the old visa was cancelled, and a new visa was put in the passport.