Easterby was hugely disappointed with the Scarlets defeat
Simon Easterby admits the Scarlets must wise up to avoid falling to another "embarrassing" defeat.
The west Wales region kicked off their RaboDirect Pro12 season with a 42-19 defeat to reigning champions Leinster.
Easterby's men appeared on course for an impressive victory at Parc y Scarlets after leading by six-points at the interval.
But Leinster ran riot in the second-half with three tries coming in the space of just 13 minutes.
"We felt we produced some really good rugby in the first half and were in control, but we conceded an early try in that second half, lost our composure and never got control back.
"Our scrum was good, we had good possession and field position and the scoreboard was ticking over.
"We did everything we talked about ahead of the game but after half-time we had a bit of meltdown. We started chasing things, the more we chased things the more we tried to force things and the ball was more often than not lost.
"We can't fault what we were doing up until half time. But some individual error, composure lost and maybe our leadership was lacking.
"We have to improve our game management, we have to make sure we don't embarrass ourselves again.
"Mistakes are frustrating and if you make that many it is very difficult to win a game of rugby. When you have a team that capitalise on mistakes like Leinster, you are going to put yourself under pressure."
The Scarlets woes were compounded by an injury to Joe Snyman. The South African second-row left the field with his arm in a makeshift sling and he will be assessed today.
"We're not sure on the extent of Joe's injury yet. We picked up a couple of bumps but hopefully nothing too serious."
WRU chief executive Martyn Phillips, WRU chairman Gareth Davies and Dragons chief executive Stuart Davies discuss the historic intentions of the governing body to assume operational control of the Newport Gwent Dragons, with a targeted completion date of 1st July.
Grand Slams, Triple Crowns and British and Irish Lions tours - Sir Gareth Edwards did it all. But what are his favourite moments in what was an amazing career? WRU TV finds out - along with his favourite players of today in the third and final instalment of our series with the greatest rugby player ever.
JPR Williams, Gerald Davies and Mervyn Davies were among those in the Welsh ranks when Sir Gareth Edwards began his international career against France nearly 50 years ago, but who was the player who took the young scrum half under their wing?
Wales head coach Rob Howley and captain Alun Wyn Jones are expecting a physical battle against France on Saturday but both are hoping for another impact from the bench as the men in red chase a top-four world ranking.
Ireland head coach Joe Schmidt believes the yellow card received by Johnathan Sexton was the crucial period of the game which handed victory to a 'clever' Wales side in a titanic RBS 6 Nations clash at Principality Stadium.
Man of the match Rhys Webb is delighted he and his team mates were able to produce a performance to make Welsh fans proud after Wales scored three tries en route to victory against a very good Ireland side at Principality Stadium.
All eyes on the Wales games against Ireland this weekend and we also hear from teams involved in the WRU Cup draw in the Principality Welsh Rugby Union Podcast. Coach Rob Howley, captain Alun Wyn Jones, back rowers Ross Moriarty and Sam Warburton on Wales, backs coach Nick Wakley and scrum half Keira Bevan on Wales Women, forwards coach Chris Horsman and prop Rhys Carre on Wales U20s, while we also hear from Merthyr, Pontypridd and Cross Keys about still being up for the Cup.
Wales head coach Rob Howley has kept faith with the side who suffered a disappointing defeat to Scotland by naming an unchanged side to face Ireland on Friday evening at Principality Stadium in the penultimate round of the RBS 6 Nations.
Ospreys and Wales duo Rhys Webb and Scott Baldwin return to their home town club Bridgend Ravens as they prepare for life after their rugby playing careers by undertaking their coaching badges at the Principality Premiership outfit.
Defence coach Richard Hodges and centre Keiran Williams discuss their U20 Six Nations campaign after victory against Scotland. Wales U20 are back at home in Parc Eirias this Saturday (18:30) to face Ireland in the penultimate round of the competition.
Sam Warburton realises a Six Nations title is now out of the question after the defeat to Scotland, but the former skipper says Wales will be playing for pride when Ireland visit Principality Stadium in the next round of the RBS 6 Nations.
Judgement Day fans will be able to buy bespoke programmes relating to the team of their choice at Principality Stadium on Saturday with organisers taking the unique step of printing four different covers to cater for the expected 60,000-plus crowd.