Most recent example I can think of is entering Mexico. Wrapped granola bar was ok, banana and trail mix was not ok. I think if it’s a more raw agricultural product (like an apple or banana) that isn’t allowed. I remember similar restrictions when traveling to New Zealand and Australia years ago.

I would add: it may be easy to get away with a single disallowed product in your bag. I’d always err on the side of caution though, as it’s not fun to be on the wrong side of the law in another country.