Hello, 1. We have a Japanese maple in the yard of our house which we bought last year. This year we've noticed a mould like substance on the bark and the trees look dead and are dropping. Would someone be able to help me identify what's happening? I'm new to gardening so would love to help this tree if possible. We don't know what caused this and if the tree is actually dead now. We have another smaller one close by and seems to be doing fine. 2. Another larger one across the yard is showing a bit of similar pattern on the trunk and the lower leaves seem to be drying up. I've attached pictures of 1. for help with identification. Thanks!