Parents, spectators and coaches at all youth rugby matches in Yorkshire have been told not to shout, cheer or even clap at games on the next two Sundays in an effort to improve touchline behaviour.
The 'Silent Sundays' initiative has been backed by the Rugby Football Union plus Yorkshire Carnegie chairman and former Lions coach Sir Ian McGeechan, after some referees reported increasing abuse from the sidelines.
The Yorkshire RFU also wants to raise behavioural standards ahead of an expected influx of new players following the Rugby World Cup, which is being hosted by England in September and October.
A letter announcing the Silent Sundays has been sent out to all clubs with parents, coaches and volunteers being asked to comply.
The letter states: "There is a small minority who are definitely not living rugby's core values while coaching or watching rugby on Sunday mornings.