Prunicola scale

If you have the flowering Cherry, lilac, or privot in your Massachusetts landscape you may notice the White Prunicola Scale (WPS).  A white cottony appearance on trunk, branches, and even twigs is a giveaway.

Although there are natural predators, they do not save valuable trees. Well timed horticultural oils are an effective control method.  You may need up to three applications in a given growing season as there are two generations of this pest.

Call Bug Busters Inc. if you notice any of the following

Symptoms:

  • White cottony covering of bark
  • Decline or dieback in the above areas
  • Early leaf drop from affected areas.