This holly bush (age unknown) has been ailing. It is located in a flowerbed on the northeast corner of my home. The soil in this bed has a high clay content. Late last summer I noticed the leaves were looking paler than usual. I fed the bush (diameter roughly four feet) with Holy-Tone per the package directions. I also fed the bush with Milorganite. The bush did seem to perk up a bit, it did flower and form berries over the winter. I recently went out to inspect it more closely for signs of new buds. I noticed that there is a fungus and/or parasite on some of the branches. I would appreciate a diagnosis of what is ailing the bush, how to treat. With treatment will the bush recover, or should I simply remove it and replace? Is this infection soil borne? Will it also infect the Japanese Pieris that I recently added to the same bed? Photos are included.