You've Got Lice! Boxwood Psyllid Control

Dusty in appearance, underhanded in action, the boxwood psyllid, also known as jumping plant lice, starts out looking like some sort of powdery fungus (or lice on that dude sitting next to you on your morning commute). Fortunately, the damage it causes is mostly cosmetic, short-lived, and, as any second-grader with lice will tell you, primarily focused on social ostracism and exclusion from birthday parties.

Of course, finding this out before an insecticide was applied would have been good, but my spraying should at least prevent these guys from laying next year's generation of super psyllids in my boxwoods.

What You Need to Know
1) Eggs hatch at around 80 growing degree days and adults appear at around 300.
2) They cause the leaves to cup, which is mostly an aesthetic issue.
3) No treatment is necessary as they'll soon die off but not before laying next year's eggs in the leaves.
4) If you do spray, they appear to be relatively easy to conquer with permethrin. However, permethrin can cause all sorts of nasty stuff, so maybe it'd be better to to accept your new identity as the kid with jumping plant lice.

Sources: University of Massachusetts Extension