Blueberries turning white and falling off - Mummy berry
Our wild blueberries form then turn white, shrink a bit then fall off the bush. We use to have healthy berries and an abundant crop each year.
Rensselaer County New York
I hope you get this. It seems every time I type the answer it disappears into the void.
Your wild blueberries have mummy berry. The infection took place during bloom. The berries fall off and send up little apothecia shaped like trumpets in the early spring. Spores from these apothecia infect the new shoots and kill them. Bees carry the spores from the dead shoots to flowers and infect the flowers. The fungus grows in the fruit and the cycle repeats every year.
Here is a link to a Factsheet from MSU https://www.canr.msu.edu/resources/michigan_blueberry_facts_mummy_berry_e2846
There are a lot of resources on mummy berry on the internet if you just search for mummy berry.