Variegated Avocado Tree
Variegated avocado tree
Avocado powdery mildew is caused by a type of fungus called Oidium. The disease only affects the foliage of an avocado tree, not the fruit. However, if the infection goes untreated and becomes severe, it can weaken the tree. In general, powdery mildew is not considered a serious disease impacting avocado trees.