Derbyshire 94 (Winslade 4-20) and 102 for 3 trail Essex 464 for 7 dec (Pettini 117*, ten Doeschate 88, Lawrence 87) by 268 runs
Scorecard
Jack Winslade marked his first-class debut with a four-wicket haul to put Essex on course for victory after Derbyshire collapsed spectacularly on the second day of the LV County Championship match at Derby.
The 20-year-old medium pacer took four wickets in 19 balls as the home side were skittled for 94 in 33 overs with Tom Moore doing the early damage with 3 for 12.
Derbyshire lost nine wickets for 56 and although they showed more fight in the follow-on, were 102 for 3 at the close, still 268 behind Essex who declared on 464 for 7 with Mark Pettini top scoring with an unbeaten 117.
The hosts had been up against it before a ball was bowled on day two with the attack already reduced to two seamers by injuries to Tony Palladino and Shiv Thakor which forced skipper Wayne Madsen to employ his occasional medium-pace after seven overs.
Madsen did take the only wicket to fall in the morning but, by then, Pettini and James Foster had taken their stand to 120 to pave the way for the mayhem that followed in the afternoon.
Pettini's form since his recall to championship cricket after a year's absence begs the question why he was ignored for so long; his second century in five innings was a major factor in Essex seizing control of a game they should win in three days barring a remarkable turnaround.
Foster passed 11,000 championship runs before he scooped Madsen into the hands of Mark Footitt at deep fine leg and although Derbyshire looked untroubled at the start of their reply, the introduction of Moore sparked a startling collapse.
Ben Slater's flick off his hip to a diving square leg was the first of three wickets to fall without a run scored in 19 balls with both former Essex batsman Billy Godleman and Chesney Hughes falling to reckless shots.
When Madsen also departed to a loose stroke, the innings was beyond repair with doubts over whether Palladino or Thakor would be able to bat. Thakor did hobble out at the fall of the eighth wicket but looked in considerable discomfort before he became Winslade's fourth victim.
There was never any question that Essex would enforce the follow-on and the pattern of the first innings was repeated with Derbyshire starting confidently in bright sunshine before Godleman cut hard at Jesse Ryder and was caught at first slip.
Slater and Hughes restored some order but the former was caught behind off Ravi Bopara who then yorked Hughes to leave Derbyshire staring at a heavy defeat inside three days.
