Sub Macro1()
Application.ScreenUpdating = False
For i = 1 To Range("A65535").End(xlUp).Row
If Cells(i, 1) = "SUMO" Then
For j = Range("A65535").End(xlUp).Row To i Step -1
Rows(j).Delete
Next j
Exit Sub
End If
Next i
Application.ScreenUpdating = True
End Sub