The life cycle of scales always includes an egg, immature and adult phases. Many of them are agricultural pests, while others prey on trees or other plant life. Crawler activity for azalea bark scale was similar to wax scale noted above at the same location in 2014. The larvae are green and closely match the leaf color of their host plants. Eggs are laid in the spring and hatch from late-June to mid-July. See below Description. Cottony azalea scale has much more of a “cottony” appearance and during the egg-laying stage will appear much larger than azalea bark scale. In Iowa, most species of shade trees, fruit trees, and ornamental shrubs are subject to scale insect attacks. Scale insects are sap-feeding insects named for the scale or shell-like waxy covering that conceals their bodies. Whether flat against leaves or fruit, or lumpy bumps on branches or stems, this widespread superfamily of insects is well over 8000 species strong. Azalea bark scale is a third insect pest of azalea. Life Cycle. The female dies as the eggs grow. Overview. These mobile immatures are known as "crawlers". These hatch around late June through July and the crawlers settle in bark crevices, on leaves, or twig forks and pass through several stages. Pest description and damage Azalea sawfly adults are small black fly-like insects. Adult females produce eggs beneath the scale ... Azalea bark azalea, rhodi, blueberry, willow, andromeda bark *immature one … Rhododendron periclymenoides, commonly called pinxterbloom azalea, is a deciduous shrub that is native to moist woods, swamp margins and open areas from Massachusetts to South Carolina and Tennessee.It is a dense, bushy, suckering shrub that … This wax covers the entire body. Figure 4. The crawlers like to attach to the bark and feed in crevices and branch forks. The female azalea bark scale lays her eggs in the spring in a white, waxy coating she produces. Life Cycle Scale insects have three distinct life stages (egg, immature, adult) and may complete several generations in a single year. Print Image. Not to scale. Life Cycle. This insect produces a white or cottony sac that is often found attached in the axils of twigs and leaves during May to June and September through October. The immature … The larvae feed on leaves at the tips of twigs and branches. See below Description. Female azalea bark scales lay their eggs in midspring, dotting azalea plants with what appear to be 1/10-inch-diameter white spots. Amauronematus azalae or Nematus lipvsky. Introduction Azalea bark scale, Eriococcus azaleae, is a scale insect that is a pest of azaleas, rhododendrons, and other members of the Heath family.They feed on the juices of the plants. Azalea bark scale overwinters as nymphs or adults in the northeast, laying up to 250 eggs in spring. A large population of the insects will cause leaf discoloration, some dieback and an … Life cycle of the azalea lace bug. Azalea bark scale, in our experience, will cause plant decline faster that cottony azalea scale.The life cycle of these scales and controls are similar to cottony taxus scale. Phonetic Spelling rho-doh-DEN-dron kah-len-dew-LAY-see-um This plant has high severity poison characteristics. The crawlers emerge in about three weeks. Eggs (left) and adult of the hawthorn lace bug. Ew, scale insects! Phonetic Spelling rho-doh-DEN-dron per-ih-kly-men-OY-deez This plant has low severity poison characteristics. Clockwise from the top: egg, first-stage nymph, second-stage nymph, third-stage nymph, adult. Scale insects can weaken and even kill trees, shrubs and houseplants, but in general, complete loss of the plant is rare. 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