Powershell command to Disable a timer job

Disable-SPTimerJob [-Identity] <SPTimerJobPipeBind> [-AssignmentCollection <SPAssignmentCollection>] [-Confirm [<SwitchParameter>]] [-WhatIf [<SwitchParameter>]]

Identity -

Specifies the timer job to disable.

The type must be a valid GUID, in the form 12345678-90ab-cdef-1234-567890bcdefgh; a valid name of a timer job (for example, TimerJob1); or an instance of a valid SPTimerJob object.

Detailed Description

The Disable-SPTimerJob cmdlet disables a timer job.

Source - http://technet.microsoft.com/en-us/library/ff607781.aspx