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.
Wales Under 18 captain Callum Bradbury is delighted to have seen his side claim a narrow 18-17 victory against a strong SA Schools 'A' side to end the three-match Under 19 International Series in South Africa on a high note.
The Wales U18 squad spent an emotional day in the drug-riddled townnship of Hout Bay. Hout Bay Warriors President Fred Johannes said the visit was 'the talk of the town' and will dream about the day everyday for the rest of his life.
RGC 1404's new head coach Mark Jones is hoping to build 'something special' in north Wales and is already looking forward to the development region participating in the Principality Premiership for the very first time.
A joint venture between the WRU and Admiral saw hundreds of children enjoy the Admiral Festival of Rugby held at the National Centre of Excellence at the weekend where Welsh internationals Sam Warburton, Scott Williams and Rob Evans were in attendance.
Wll Jones leads Wales U18s into battle this afternoon against Italy where the Welsh side will be seeking to bounce back from their narrow defeat to SA Schools in their opening clash of the U19 International Series
All four regions attended a successful training camp staged last weekend at the WRU National Centre of Excellence. It was a chance for new Wales Women's head coach Rowland Phillips to deliver his key messages to players and coaches as he prepares for the new season.
Wales U18 Team Manager Gethin Watts believes the next couple of weeks will be 'extremely beneficial' to the future of Welsh rugby as his side prepare to take part in the Under 19 International Series being staged in South Africa.
The WRU is searching for 12 new rugby development apprentices following a successful first year of its WRU Coach Core programme. Craig Duncan and Jess Hancock have flourished in the first year of the programme which has given them a real direction in their lives.
The WRU signed TV comedian Rhod Gilbert up to a 'Coaching Children Level 1' course before letting him loose on an U8s side at Whitland Junior Borderers - we went behind the scenes to film the making of 'Rhod Gilbert's Work Experience' see the results here.
Llandovery are aiming to make it three titles in a row in this year's Foster's National 7s being held at BT Sport Cardiff Arms Park on Sunday 28 August. Drovers assistant coach Simon Davies and Lee Rees assess their sides chances
A pioneering strength and conditioning programme has been delivered to more than 8000 boys and girls at hub schools throughout Wales this season, helping to develop stronger, more flexible athletes for rugby and other sports.
The Singha Premiership Rugby 7s Series returns to the BT Sport Cardiff Arms Park on July 22nd when all four Welsh regions go head to head. Scarlets skills coach Dai Flanagan and Blues Elite Performance Pathway Manager Richard Hodges along with current Welsh squad members were at the launch of this season's event