A truly horrific case of mealy bugs. Spray thoroughly with Insecticidal Soap or alcohol, blast the dead bugs off with your sink sprayer and wait for next onslaught - it could occur in a matter of hours. You can use a toothpick to work the bodies out of the spines. You may have to spray a lot to get them under control. Find a systemic (Bonide granules work well) and use it.
