Why do you guys rely on the Buenos Aires herald for your news, it has some pretty crappy use of the english language, and a knack for getting the facts wrong...
First off, there has never been an official ban of any imports.
Domestic Trade Secretary Guillermo Moreno (Buenos Aires Herald, he is not just the trade secretary) did indeed issue a stern warning to supermarkets warning them that they would not be able to import food that has a nationally produced counterpart.
Now obviously this falls outside of the realm of Mr. Moreno, but the heads of the supermarkets will still listen to him, they know how things work in Argentina. They have probably stopped ordering European Food Stuffs, just like they stopped ordering Brazilian Food Stuffs because they are unsure if they will make it past customs, and they don't want to lose any money in that.
Now a couple weeks ago there was an article in Clarin that showed communiques between Mr. Moreno and Aduana that instructed Aduana to personally ask Mr. Moreno's office about imported foods, and he would make decisions when a decision had to be made.
In the end, more crap of Kirchner, nothing has been institutionalized, and according to the books there are no restrictions on imports so the WTO will be happy. But in regards to what exactly is banned, it is whatever the hell they want to declare contraband at aduana...
Edit: Fixed Moreno's title as Domestic Trade Secretary