If you don't mind using PS see if this helps:
http://www.mssqltips.com/tip.asp?tip=1798
to narrow down the jobs that do the backups you could do something like this:
if ($instance -eq "MYINSTANCE") {$jobs=$srv.JobServer.Jobs | where {$_.Name -like "DB_BACKUP"}}
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Allzu viel ist ungesund...