The Tacuinum MSS made for Visconti were innovative in their illustrative program (although they did combine elements from various sources). As I wrote in my summary of Hoeniger's article, they had an influence on North Italian fresco art. This might be more along the lines of what you're thinking of. It's possible, though I wouldn't exclude the possibility of a library either, or even a "sample book" with exemplars for various drawings.
There's a similar scene later in the Tacuinum, called "vinum album" (white wine). It shows the depressed woman handing the fruits she picked to a man. Below (top to bottom) Paris, Rome, Vienna.
While the pears are in the correct hand here, I think the overall resemblance is less than with the Paris "pear" image I originally posted. As I've written about before, the VM obsessively puts items in the "far hand", so if a Tacuinum "pear" image or something based on it was the source, the pears would have to be moved to the far hand.