The next two games of the Invesco Perpetual Series will be played on a new pitch.
A new turf surface is to be laid at the Millennium Stadium in Cardiff to replace the existing pitch before the Invesco Perpetual Series match between Wales and Argentina which takes place on Saturday, 21 November.
Independent consultants examined the turf during the week and confirmed it has been contaminated by Bibionidae fly infestation which causes damage to root growth and the surface grass coverage.
The Millennium Stadium Manager, Gerry Toms, confirmed that a decision has been made to replace the pitch to avoid the consequences of grass and root erosion which could take place before the remaining Invesco Perpetual Autumn series internationals.
The games against Argentina on Saturday 21 November and Australia on Saturday 28 November will now be played on new turf which will be delivered from County Turf in Lincolnshire and laid over the weekend.
The new grass surface will be laid on the existing pallet and soil foundation will consist of 1.2metre by 15 metre lengths of turf which will have been maturing and developing root growth for 18 months.
Bibionidae fly infestation was discovered when the independent experts were called in as a precaution to check the pitch after excessive rainfall had affected the surface prior to the international match against New Zealand.
Advice from experts has indicated that quality of the pitch at its current level cannot be guaranteed while the Bibiondae fly infestation is still active.
In the ten year history of the Stadium more than 25 pitches have been laid and this is the second occasion when an infestation has resulted in a decision to immediately change the pitch.
Millennium Stadium Manager, Gerry Toms, said: "We have decided to avoid any risk of the infestation causing further erosion over the weeks ahead by deciding to replace the surface now.
"Obviously our major concern was how much damage might take place between now and the Australia match which will take place at the end of November.
"By installing a brand new surface we effectively remove any question mark over the stability of the surface because the turf delivered will have healthy root and grass growth.
"The important issue is that we have carried out the correct checks and acted decisively on the information before us.
"The pitch tonight was not to the standard we require which, combined with the unknown factor of the potential erosion over the next two weeks has prompted us to act now instead of waiting for any further assessments in the days ahead."
The pitch was tested by the STRI, Sports Turf Research Institute and following their initial findings independent experts were consulted separately to confirm the condition of the pitch and advise on treatment or replacement options.
Mr Toms explained that the WRU had been advised that the Bibiondae fly infestation cannot be treated effectively to destroy the microscopic insects.
Agronomist Mr John Lockyer, one of the independent experts called in separately to advise on the condition of the pitch, said: "We have confirmed the presence of this infestation and I agree with the decision to take positive action now to replace the surface.
The insects which consume the grass thatch and root material can multiply during the current weather conditions.
In October 2008 Root Knot Nematodes which causes gradual deterioration of the grass quality, was discovered in the Millennium Stadium pitch and the turf was replaced.
Principality Stadium will host the UEFA Champions League Final in six weeks' time. WRU chairman Gareth Davies, Football Association of Wales chief executive Jonathan Ford and Ambassador Ian Rush joined young sports fans at the trophy arrival at the venue to celebrate the magnitude of the event on Saturday 3rd June (kick-off 19.45).
British and Irish Lions captain Sam Warburton is looking forward to bringing together players from Ireland, Scotland, England and Wales for the biggest challenge of their careers - a series against world champions, New Zealand.
For the fifth year running, Wales referee Nigel Owens will be in charge of proceedings at Judgement Day V at Principality Stadium. It promises to be 'extra special' for the Wales' favourite ref, as he will be making his 150th appearance in the league.
There will be no shortage of inside knowledge from Bowl Finalists Caerphilly and Amman United when they face each other on Sunday at National Finals Day. Caerphilly hooker Rhys Cleverly knows the Principality Stadium pitch better than most as a matchday groundsman, while Amman United can look to Wales' record try scorer Shane Williams for some helpful advice.
Two hundred and 40 teams competed in the inaugural Urdd WRU 7s held at Pencoed last week with Welsh internationals Steff Andrews and Jasmine Joyce impressed with the talent on display, as was Urdd chief executive, Sioned Hughes.
The countdown is on for Judgement Day V as tickets for the big day at Principality Stadium soar through the 50,000 mark. Players and coaches alike are bursting at the seams to play in the double header with Dragons coach Kingsley Jones claiming there is a 'real buzz' about the event.
WRU TV went behind the scenes when the four regions got together to test their skill set for the BBC's Scrum V Live rugby show, at the WRU National Centre of Excellene in the build up to Judgement Day V. Blues' Matthew Morgan was one of the stars of the show while the Dragons' Cory Hill proved a surprise package...the full set of results will be revealed on tv screens on matchday
Wales assistant coach Richie Pugh is confident his side can cause a few headaches in the Hong Kong Sevens this weekend. In a tough group, Wales kick off their campaign against New Zealand on Friday before playing Japan and Fiji, who are chasing their third consecutive Hong Kong title, on Saturday.
Bedwas had to overcome a stubborn Carmarthen Quins side before winning the Foster's Challenge Cup final in Bridgend with a 23-18 victory. Bedwas captain Nicky Griffiths pays tribute to his side who have claimed the club's first piece of silverware in the modern era.
Team coach Brett Davey is aiming to keep his unbeaten run in cup finals at Principality Stadium intact when his side take on Amman United in the WRU Bowl final, after he guided Caerphilly to a 20-14 win against Cilfynydd in the semi-finals.
Penallta are hoping to go one step further than last season when falling to Bedlinog in the WRU Plate Final. After a titanic struggle against Nant Conwy, they have given themselves a great chance, after a hard fought 18-13 semi-final victory.