Janata Dal (United) president Sharad Yadav expressed serious concern over damage to crop caused due to sudden change in weather.<br/><br/>Addressing media persons in Jaipur on Saturday he asked central government to call an all-party meeting to discuss the situation.<br/><br/>Mr Yadav suspected wheat and mustard crop will be worst affected by change in weather. <br/><br/>He asked government to work out an action plan for the relief of farmer.