The larvae emerge and begin feeding on the sap of the plant. ECN UME Home and Garden Info Center The females tend to enjoy feeding on the sap from the stem of the plant, but the males will form scales on … but also pachysandra, hollies, and camellias. Read more here to learn … Euonymus scale, Unaspis euonymi. Euonymus scale, Unaspis euonymi, is an armored scale that is a very common pest of euonymus and pachysandra. In general, plants growing close to buildings are more susceptible … Generally, they can be described as small bumps which can be easily scraped away. They are often found on trunks, twigs and branches. Without treatment, heavy scale infestations will reduce … Is the tree in jeopardy? Q: Our prized hundred-year-old oak may be in trouble. Euonymus scale – Look for euonymus scale on leaves and stems of Euonymus spp. The female scales are gray and pear-shaped, while the males are smaller, narrower, and whiter. As a nymph, the scale is mobile, crawling around looking for new places to feed. They produce a scale over their tiny bodies that appears as white or brown flecks on the stem and leaves of the plant. The female scale cover is oyster-shaped, gray, and 1-1.5 mm long.Males are white (0.75 mm) with no cover and 2 visible wings ().In North Carolina there are three generations per year with first crawlers emerging in early May then in 6-8 week intervals. The female insects lay eggs in May. Female Euonymus scale females (about 1/16 inch long) have dark brown to gray, somewhat pear-shaped bodies. Euonymus scale is now established in the United States and Canada and has become a major concern in many landscapes. Controlling Euonymus Scale Bugs. When abundant, these armored scales can completely encrust twigs and leaves of Euonymus, pachysandra and bittersweet. If the scales simply crumble away dryly, all you have is the leftover shells of dead bugs and you don’t need to treat. Almost overnight we noticed that the pachysandra circling our tree has died in a path leading to the trunk of the tree. Moderately to heavily infested plants grow very … There are probably two generations each season, and the winter is passed in a nearly mature condition; eggs are formed during May and hatch later in the month. Euonymus scale has become a concern in many landscapes. A: I don’t know why the dead plants occurred in a path to the tree but euonymus scale is the cause of the pachysandra problem. Euonymus scales (Unaspis euonymi) are a common problem on pachysandra. Scales are insects. If you see an orange smear, the scales are still alive and need to be dealt with. Pachysandra – Euonymus scale. The white coverings of males are distinctly smaller and narrower. Although the individual insects are small, infestations are often dense and plainly visible. Euonymus scale treatment is a game of timing. Pachysandra – Euonymus scale. 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