In my area of western Kentucky service berries are not fruiting. The fruit develops well but before ripening they brown almost look mummified and produce multiple small stalks coming from the fruit. I am assuming this is a fungal disease but cannot find a description. This occurs on ornamentals I have planted but also on wild in the woods trees, and I am trying to plan ahead to prevent it happening next year.
We are pleased that you are using our website information and suggest that you look at an earlier post on serviceberry, which describes cedar rust and includes links to photos of the odd-looking infected berries. Please see “My serviceberry has some berries that aren’t normal”, which responds to your query. We have several hundred documents posted to our website, which is searchable (just enter your search term, in this case “serviceberry” on our main search page.
Please note that our expertise relates to gardening in the Toronto (Canada) area. You may want to contact master gardeners in your state with your gardening questions. The American Horticultural Society’s Master Gardeners website provide contact information for master gardeners by state.