Need help improving UPDATE statement

This statement used to run just fine. It updates around 75,000 rows. I'm guessing with the additional indexes to improve the select statements I have slowed down this statement. I need help improving the speed of this update command.

UPDATE TRAPPING_MERGE_EVW 

Set

TRAPPING_MERGE_EVW.needs_inspection = 'Y',

TRAPPING_MERGE_EVW.t_date = NULL,

TRAPPING_MERGE_EVW.wvlcount = 0,

TRAPPING_MERGE_EVW.action = NULL,

TRAPPING_MERGE_EVW.killstrip = '0',

TRAPPING_MERGE_EVW.lure = '0',

TRAPPING_MERGE_EVW.cropstage = '99',

TRAPPING_MERGE_EVW.trapper = '999999',

TRAPPING_MERGE_EVW.sched_insp_concat = schedule||'Y'

WHERE schedule = 'N' and ZONE like '17%'