Lecanium scale attach themselves to the leaves and twigs of trees and feed on plant nutrients, causing significant damage.

Many crape myrtle trees across the D.C. region are infested by a bug called bark scale, which leaves behind a black fungal infection. A cure is elusive.

It is best to eliminate scale while in the "crawler stage" before they mature and form hard shells. In the case of a lighter infestation, especially in a smaller tree, other measures may be taken.

WASHINGTON — Crape Myrtle trees are found all over the DMV. They boast beautiful blooms and are a staple of many landscapes. But little white critters, called bark scale, are threatening the trees.