August 27, 2018
My flowering cherry is loosing its leaves,it flowered well but not many leaves formed like the year before.It was covered in what i thought was blobs of white stuff almost like filler.blamed the local builders as we have house building nearby.however the white blobs are all over the branches and backs of the leaves.It really looks quite sick.sorry no pics.
August 29, 2018
It would really help me to have some pictures, but without them my best guess would be a fungal infection. In this case, the best treatment will be wettable sulfur and dolomitic lime. This will kill the infection, as well as keep the soil conditioned while this is happening.
If you can find a way to include photos, then I can identify the exact pest, and offer a more customized solution.