Today I found female juniper scale. After flipping a couple covers I found they were all bursting with eggs and crawlers.
Juniper scale, Carulaspis juniper, attacks some of the most commonly used plants in ornamental landscapes including Juniper, Thuja, Chamaecyparis, Cupressus, Pinus, and others. There is one generation per year in which females fill up their armored cover with eggs in spring from which crawlers hatch and look for new feeding sites. Infestations can lead to foliage that becomes yellow or brown and generally less lustrous than normal. Large infestations can cause the tips of branches to die and the plant to become sparsely foliated.
Isolated infestations can be pruned off of plants. Natural enemies will often keep scale below damaging thresholds. However, in environments where natural enemies are not abundant control may be necessary. Horticultural oil will smother crawlers. Other chemicals such as dinotefuran (Safari), acetamiprid (TriStar), and pyroproxifen (Distance) and others can be used to manage infestations. More information on armored scale management can be found at: http://www.ces.ncsu.edu/depts/ent/notes/O&T/shrubs/note157/note157.html