Since
glyphosate in Round-Up, is weakening the plants immune system (think plant AIDS) we'll have trouble growing enough food.
But that's kind of moot, since this "Collapse of civilization" would most likely disrupt supplies to the grocery store, which would be empty in a day or two.
Without any food, next years crop is just a philosophical discussion.
And those deer that come down to drink in my back yard, are in deep shit.
