The IFA has said it would be totally unacceptable if further cuts in agricultural subsidies are imposed in a new agreement on world trade.
Talks on a WTO deal will be held next week in Mexico, but the IFA have insisted that Europe must not concede anything more than was agreed in the recent CAP Reform.
The 140 member nations of the World Trade Organisation will discuss new rules for global agricultural trade at their meeting in Cancun.
Much of the focus in these ngotiations has been on the reduction of subsidies, which are seen to give some countries an unfair trading advantage.
But IFA say European farmers have already taken pain in the recent CAP reforms and they should not be asked to pay twice.
The IFA leader, John Dillon, warned that if import tariffs are cut by 36% as proposed then European sugar and high value beef cuts could be vulnerable to imports.
Mr Dillon also said the EU will need export refunds for butter and beef for the forseeable future.
The IFA say the special treatment being promised to developing countries should help them towards an agreement, and they say it is now up to major trading nations such as the US, Canada and Australia to make concessions.
