YORKSHIRE took charge of their County Championship match against Durham at Chester-le-Street by taking six wickets in the afternoon session.
Earlier, Josh Shaw took a wicket with his seventh ball on his first County Championship appearance for Yorkshire.
The 20-year-old pace bowler, who hails from Wakefield, bowled Keaton Jennings as the Durham batsman shouldered arms to a delivery that nipped back.
Shaw, who has played six Championship matches for Gloucestershire this summer, is part of a fresh-faced Yorkshire attack at Chester-le-Street, where the champions are depleted by injuries and international call-ups.
Shaw was recalled from a season-long loan at Bristol last week, with Yorkshire currently without Ryan Sidebottom, Jack Brooks, Liam Plunkett, David Willey, Adil Rashid and Matthew Fisher.
Shaw’s was something of a bonus wicket for Yorkshire, and another one followed when Scott Borthwick ran himself out for two, pushing Steve Patterson to mid-off and chancing a quick single to Andrew Gale, who threw down the stumps at the non-striker’s end.
Prior to that, Yorkshire had struggled to make inroads after Gale chose not to contest the toss beneath cloudy skies.
Ben Coad, a 22-year-old from Harrogate, was making his full Championship debut and he opened the bowling with Tim Bresnan, the only experienced member of the attack along with Patterson.
The start was delayed by five minutes due to light rain, and only one over was possible before further rain caused a 30-minute stoppage.
After that, with only one over lost from the day’s allocation, Jennings and Mark Stoneman were quickly into their stride, adding 49 for the first-wicket in comfortable fashion.
But Shaw’s strike changed the mood of the morning, and Gale’s fine piece of fielding provided a further boost.
At lunch, Durham have reached 72-2 from 22 overs, with Stoneman unbeaten on 45 and Jack Burnham undefeated on four.
The hosts moved from 72-2 at lunch to 155-8 at tea, Patterson leading the way with 4-47.
After Burnham was dropped on four at first slip by Alex Lees off Shaw in the first over after lunch, Durham fell to 74-3 when Stoneman went lbw to Patterson for 45.
The hosts slipped to 98-4 when Patterson had Michael Richardson caught behind for 18 and to 110-6 when Patterson bowled Ryan Pringle for three.
Tim Bresnan had Usman Arshad caught behind for three and Durham fell to 148-8 when Shaw had Barry McCarthy caught and bowled for nine off the bat/pad.
At tea, Burnham had moved on to 40 and Chris Rushworth was on six.
Durham: Stoneman, Jennings, Borthwick, Burnham, Collingwood (captain), Richardson, Pringle, McCarthy, Arshad, Rushworth, Onions.
Yorkshire: Lyth, Lees, Williamson, Ballance, Gale (captain), Leaning, Bresnan, Hodd, Patterson, Shaw, Coad.