Warwickshire's seamers took a firm grip of their Liverpool Victoria Championship match at Edgbaston by dismissing Yorkshire for a lowly 216.

Replying to Warwickshire's 316, Yorkshire slumped into trouble shortly before lunch by losing three wickets in as many overs to shatter their hopes of reaching parity.

After resuming the second day on 15 without loss, Yorkshire were undermined by the loss of opener Matthew Wood in the third over of the day when he edged Zimbabwe seamer Heath Streak to Nick Knight at first slip.

Fellow opener Joe Sayers suffered an identical dismissal and but for a belligerent 48 from Anthony McGrath, which included seven boundaries, Yorkshire's top order would have capitulated completely.

South African-born seamer Tim Groenewald, who was making his championship debut, made the crucial breakthroughs before the interval and struck with his sixth ball to have Michael Lumb caught at slip to give Knight his third catch.

His biggest scalp, though, was removing Darren Lehmann in his next over when the Australian batsman drove wildly outside off-stump and was brilliantly caught by Jonathan Trott at first slip.

Groenewald could have also dismissed Yorkshire captain Craig White with his next ball, but his outside edge was missed by wicketkeeper Tim Ambrose.

It was a costly miss with White going on to contribute 23 to a 45-run stand with Gerard Brophy, which was only broken by a superb piece of fielding from Groenewald.

Brophy had driven Groenewald back down the pitch and, with White out of his ground, the young seamer stretched to deflect the ball onto the stumps at the non-striker's end to manufacture the run out.

Any hopes of Yorkshire mounting a lower-order recovery were ended by the dismissal of Brophy, who had battled his way to 40, eight overs later when he was bowled attempting to sweep England off-spinner Alex Loudon.

Left-arm seamer Neil Carter and Streak mopped up the tail to leave Australian seamer Jason Gillespie, whose last competitive innings was his record-breaking unbeaten 201 against Bangladesh in Chittagong, unbeaten on six as Warwickshire earned a healthy 100-run lead.