(76) Photo: Whitney Cranshaw Cottony maple scale crawlers along leaf veins in the summer. and many others) have a similar life cycle to the calico scale. Life cycle of pine needle scale. As temperatures increase in the spring, the female starts to grow again. Azalea bark scale shown on an azalea also may be found on rhododendrons. The female cottony cushion scale produces up to 1000 eggs, … These masses produce a considerable amount of sticky liquid that resembles tree sap and eventually turns black due to fungal growth. Females without egg sacs are 1/8 inch (2-3 mm) long, flat, pale to dark brown and soft. West Lafayette, IN. Using degree days and plant phenology to predict pest activity. Cottony Maple Scale; May 18, 2005: We are receiving reports of silver maple trees dripping in the Kankakee County area and have seen some specimens of cottony maple scale from northern Illinois. By late spring, the … The small, brown, 1/8 inch long flattened scale overwinters as an inconspicuous, immature female on the bark of twigs and branches. Check plants for live scale infestations. In the spring, the male and female nymphs mature, mate and the females crawl to the underside of leaves to lay eggs starting the life cycle all over again. These small, round beetles sport markings of various shapes and colors on a black background. ), and sourgum (Nyssa sylvatica). These scales also produce large amounts of liquid waste Thus, the first line of defense against this and other soft scales is to focus on maintaining tree health. ���H.�q�� � … Scale insects are sack-Fig. Cooperative Extension Service.] They are elongate and oval. For example, lady beetles belonging genus Hyperaspis are commonly found chowing-down on this and other soft scales. The eggs hatch into pale yellow-green crawlers in late June or July and migrat… Cottony maple scale may be found on currants, gooseberry, grapes, as well as maples. They feed by sucking sap and some can weaken host plants, many excrete a sticky substance (honeydew), which allows the growth of sooty moulds. The adult beetle is black with a red spot on each wing. Late May or early June, the eggs hatch and tiny white "crawlers" find new feeding sites on the host plant. During June, the inconspicuous female scales that spent the winter on the stems expand and begin producing a large, … Hosts: Maples (especially silver), honeylocust, linden and other hardwoods. They are most commonly found on red (, Cottony maple leaf scale eggs begin hatching when the accumulated Growing Degree Days (GDD) reach 1,216. and many others) have a similar life cycle … Whenthe bump itself can be squashed it is likely to be some othertype of scale. I recently visited two landscapes in southwest Ohio with medium-sized red maples (Acer rubrum) there were heavily infested with cottony maple leaf scale (Pulvinaria acericola). On the average, her ovisac may contain more than 2,500 eggs. Color photographs for 200 scale species and detailed discussion of these and others are available in the California Department of Food and Agriculture publications by Gill listed in References. It produces 3-6 mm cottony ovisacs on leaves in late spring. The cottony maple leaf scale prefers maples which isn't surprising given the scale's common name. Honeydew is produced and this falls onto foliage and flowers and, in … This the second largest coccinellid genus with 94 species found in North America north of Mexico. Each cottony mass contains up to 1,500 eggs. Then in late spring eggs are produced hidden under the mother scale. There are many different scale insects and their life cycles vary. By late spring, the … Barkis usually intact beneath a scale. It's common for the honeydew to become colonized by black sooty molds to produce an unsightly mess on anything located beneath the canopy. Maskell "after the Rev. They eventually molt into scales. Scale … The only time they appear on leaves is when populations are exceptionally high. Occasionally, heavy outbreaks of this scale occur, usually on weakened or stressed trees. Mature cottony maple scales are small, flat, oval, brown insects without obvious legs, antennae or wings. Each species has a different host range and life cycle. Both of the cottony scales have life cycles that are very similar; however, the cottony maple scale appears to have a wider host range. They are slightly convex and are brown with a yellow-brown ridge down the back . 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