Looking for immediate help on two beautiful Eugenia topiaries. They have developed a white "fungus" on the leaves and branches, causing a vast amount of the leaves to fall off (still green) and/or the leaves are drying up and falling off. I have used a soap base spray on the leaves for bugs but it isn't helping. They are almost completely bare on the bottom and the "disease" seems to be working its way to the top. Help!