Thanks for the info. My sis and mom don't want to waste fruit. Want more more more, don't care about the size of the fruit.
For my 2 trees, I didn't expected any fruit first year, but for now, I am happy to if I can keep about 10-20 fruits between the 2 trees by the time Chinese New Year come next year (Atemoya sells for 10.00+ a lb during that time).
Size is one part of it, but tss (sweetness), flesh to seed ratio, and other factors in overall quality of fruit will suffer. If they are looking to sell them, I can't imagine there's a market for marginal examples of the fruit let alone poor examples which lack size, sweetness, and edible flesh.
I may be culturally biased, but I find difficulty imagining anyone seeking out a golf ball sized seedy atemoya.
In my culturally biased opinion, the runt fruit are more of a waste.
Still though, fruit bags are not a factor in the dropping of fruit, the tree is doing this in response to the overburden placed on it.