Most food consumed in Russia is grown in Russia, and there are already analysis showing the impact will essentially be minimal to both the EU and Russia.
What it does mean though, is that specialty foods that are primarily eaten by the urban upper middle class in Russia will no longer be available. But incidentally this is a part of the 20% of the population that hasn’t bought into Putin’s ultra-nationalist rhetoric.
Russia is honestly in a bad place and I feel bad for Russia, I feel a lot worse for Russians than I worry about Russia the long term. Russia became weak, and Putin is offering the same type of message that brought fascists to power–essentially, “we can be strong again, but you need to back my belligerence because that is how we become strong.”
The problem is, even in the 1940s it was questionable if large scale annexations made countries stronger. Maybe if the Allies had sued for peace it would have worked for Germany, but Italy was already going down the drain from its fascist policies. Russia faces an even worse calculus in the 2010s, any land Russia might want to “absorb” like eastern Ukraine or Crimea that it has already absorbed will come at a cost that will probably never pay for itself. Russia is literally being belligerent over net-negative regions, that will reduce Russian GDP and require subsidy from Moscow (this is dramatically true in Crimea–it was less true in Eastern Ukraine but Putin’s efforts there mean if he ever did get to annex Eastern Ukraine he’d be annexing a mess.) Even if Putin doesn’t go for any further annexations, just Crimea alone is going to be a long term, permanent albatross around Russia’s neck. Sanctions always hurt, it doesn’t matter if you can “find other trading partners”, sanctions still hurt. Your goods and services are most valuable when you can shop them in a truly global market to get the best price. It’s like Iran’s oil shipments to China, yes, Iran was still mostly able to move oil. But were they able to get the same price as Norway or Russia or Canada? No, they weren’t, because buyers aren’t stupid. If a buyer knows that because of sanctions you no longer have access to a truly global market, they know they have more cards than you do. They’re going to require lower prices, they certainly have no reason to offer you “market rate.”
Some of this won’t play out for years, so Russia has time to turn it around (especially since many big commodity deals are structured and play out years in advance.) But there’s really nowhere Russia can go with the “Putin plan” that makes Russia a better place to leave, and probably no way to even achieve what Putin wants, which is “geopolitical strength.” Russia is an old Europe style country that is lucky to have natural resources, but it’s solely a resource economy. It isn’t growing like Brazil, China, or India, and shouldn’t be considered economically similar to them because its engine of growth is solely natural resources, not its population.
It’s particularly unfortunate Russians have allowed Putin to close all media critical of him, as he controls 100% of the public message in Russia, because Russians should be smart enough to see that Putin’s grandiose plans just lead to GDP stagnation, debt, and no real increase in geopolitical power. Putin is basically willing to waste away Russia’s wealth to make himself look strong, to no real long term gain.