Diseased Ornamental Cherry, What is it and What to do
Hello, I have an ornamental cherry tree in my yard that appears to be infected with some kind of fungus or other disease. Attached are several pictures as recommended that you need, below are links to those photos along with a few more that are on my public Dropbox folder. https://dl.dropboxusercontent.com/u/28316726/IMG_4093.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4095.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4097.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4098.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4100.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4091.jpg https://dl.dropboxusercontent.com/u/28316726/IMG_4092.jpg Thank you for your time and attention in helping me on this.
The leaves and fruit (especially the calyxes on the bottom of the fruit) are very suggestive of crab apples. The disease looks like cedar apple rust. The amount of rust disease varies from year to year, closely related to weather in the spring. Here is our website info on it: http://extension.umd.edu/hgic/rust-diseases-trees-and-shrubs
The infection period was early in the season. Fungicide applications need to be applied when leaves are starting to expand in the spring. No control measures are applied at this time of year.