Damage symptoms: Serious infestations of the gloomy scale can cause stunting and dieback of affected limbs. 0000007338 00000 n 0000003666 00000 n Cottony maple scale is a soft scale that infest maples, boxelder, basswood, birch, elm, and linden trees. Treatment Strategy. 0000001739 00000 n It may also be found on other species including sweetgum, holly, and mulberry. Heavily infested maples start to lose twigs and branches at first and eventually entire sections of the tree as the scale slowly sucks the fluids out of the tree. Coat the foliage with the insecticidal soap after the scale crawlers have hatched, and then apply the insecticidal soap again about 10 days later. 0000002846 00000 n This species overwinters as a small immature form and moves to find feeding spots in the spring. Eggs are laid in June/July. trailer <<6E2AF465E68A4EB7B25483347258FDB0>]/Prev 1017561/XRefStm 1407>> startxref 0 %%EOF 185 0 obj <>stream When necessary, treat with dormant oil in late winter, or an insecticide for crawlers: June l0-20. • Gloomy Scale Crawlers are Active • Lecanium Scale Crawlers! As gloomy scale feeds it collapses individual plant cells, reducing the trees ability to function correctly. 0000007814 00000 n 0000024270 00000 n Adults produce crawlers which seek out suitable feeding sites on your tree. However, you will probably see them if you are scouting Males go through crawlers emerge (1500 GDD – 2500GDD). This leads to a 200-fold increase in gloomy scale abundance, which combined with temperature, reduces the condition of red maple street trees. Many armored scales are serious pests of ornamental shrubs, trees, groundcovers and turfgrasses in South Carolina. Gloomy scales overwinter as adults and development resumes in April and the first crawlers are produced in May. covered with gloomy scale Scale Update Gloomy Scale By: Stanton Gill, UME Steve Sullivan, The Brickman Group, reported heavy populations of gloomy scale on red maples in Northern Virginia. Street trees are particularly prone to gloomy scale. Biology. Since gloomy scale crawlers are active in early summer, generally late May through July (Miller and Davidson 2005, Frank et al. MANAGING. The video was taken under a dissecting scope by Adam G. Dale. Gloomy scale ( Melanaspis tenebricosa) is one of these. Why Is Lime Important For Virginia Lawns. 0000005320 00000 n should be applied at 4 week intervals beginning at crawler emergence as visible. One of the reasons we have found this to be such a pest is that female gloomy scales produce about 3 times as many eggs when they live on relatively warm trees (like in a parking lot) than when they live on cooler trees (like in a shady yard). Acer is also one of the most common tree genera planted in U.S. residential and commercial landscapes, parks, and public spaces (S. F., unpublished data). Crawlers are produced until the middle of August at which time practically every stage of development can be found. 144 42 0000020398 00000 n Gloomy scale (Figure 3) is a particularly widespread and damaging scale on red, silver, and Freeman maples. They are convex, gray, and occur in dense patches ( Figure 8 ). The small insects feed on plant cells, resulting in stunted growth, branch dieback and … 0000005895 00000 n Since gloomy scale crawlers are active in early summer, generally late May through July (Miller and Davidson 2005, Frank et al. Gloomy scales overwinter as adults and the first crawlers are produced in May. 0000011173 00000 n Q: Why are there dark patches on the bark of my maple tree? After selecting a feeding site, females settle on the plant where they lose their antennae and legs and begin to produce their waxy covering. Crawlers are produced until the middle of August at which … The life stage most susceptible to control is the first instar nymph, called a crawler. 0000004743 00000 n 0000006857 00000 n 0000007928 00000 n Why Is Lime Important For Commercial Lawns? This scale is only found on bark, branches or twigs of hosts. Gloomy scale crawlers begin emerging in May. Crawlers are produced until the middle of August at which … The Certified Arborist showed me what Gloomy Scale was and at first I thought he was trying to trick me. If the scale is low on the tree so that you can reach it, you can scrape the infested areas with a coarse-bristle brush (not wire) before you spray to increase … Gloomy scale resembles little flat gray colored discs that can be found on the trunks and stems of its victims. 0000001407 00000 n This leads to a 200-fold increase in gloomy scale abundance, which combined with temperature, reduces the condition of red maple street trees. 0000001583 00000 n This is a native species of scale that is usually kept under control by native parasites and predators. If someone has branch samples send 0000018621 00000 n Most maple species, such as red maple (Acer rubrum L.), silver maple (Acer sacc… Gloomy scale can also infect Boxelders, hollies, mulberry and sweetgum trees. Mature females under tests are pink, wingless, and legless whereas males develop wings and legs but have a very limited life span. Spray your red maple trees with an approved insecticide, such as carbaryl, acephate, chlorpyrifos or malathion, only … When eggs hatch, the mobile crawlers walk or are blown by the wind to new locations where they settle and begin to feed and produce their own protective coating. I found that crawlers Crawlers are produced until the middle of August at which time practically every stage of development can be found. Some armored scale species like gloomy scale have one generation per year. 0000270019 00000 n Mature female covers have a dark spot (shed skin) just off center whereas male covers have a spot near the cover edge. Cottony maple scale is a soft scale that infest maples, boxelder, basswood, birch, elm, and linden trees. Also look for this armored scale on dogwood, sweet gum, poplar, catalpa, black locust, willow and grape. ORNAMENTALS AND TURF . Armored scale, such as Gloomy Scale, aren’t nearly as obvious and can go undetected for years and build to damaging populations. Gloomy scales can be found on maples, especially the soft maples (boxelder, red maple and silver maple), and cause significant damage over time if not detected and treated. The likely culprit is gloomy scale, an insect with a gray shell that blends in well with bark. Seems that Gloomy Scale insects have been spending the winter snuggled up in their arboreal homes, and are about ready to resume development next month with their first offspring crawlers showing up in May. 0000695438 00000 n The bark becomes a blackish grey with molds and course from the armor of the scales. crawlers sometime in late June or early July. Call or click here for a free tree and shrub analysis. The female is protected under a 1/8” diameter grey covering that blends into the bark and often goes unnoticed until infestations become quite heavy. Here, they will feed on the content of plant cells for the remainder of their life. is an armored scale pest of primarily red and silver maples. The insects are perfectly camouflaged to match the bark of the tree branches and crowd together in … Overwintering: Mated females. Although less commonly seen, gloomy scale can also infect grapes, native hollies, sweetgum, and mulberry. Scale insects spend most of their lives immobile under their protective coverings. Adult female armored and soft scale insects are sedentary and wingless and produce offspring. 0000015733 00000 n 0000001136 00000 n Gloomy scale (Melanaspis tenebricosa) crawlers emerging from adults scales and wandering on a red maple twig. Gloomy scale is a common and serious pest of silver maple and red maple. Gloomy scale occurs on the soft maples like silver and red maple. Recent work by Adam Dale and Steve Frank shows that gloomy scale in warmer regions of the city produce 3 times as many crawlers per individual, than those on trees just 2 degrees Celsius cooler. 2013), trees planted before the end of July could have been colonized by gloomy scale in the year of planting. Gloomy scale – Gloomy scales primarily infest the trunk and branches of red maple trees but can infest other trees. There is one generation a year. 0000214950 00000 n It is under this protective covering that all the dirty work is done. Recent work by Adam Dale and Steve Frank shows that gloomy scale in warmer regions of the city produce 3 times as many crawlers per individual, than those on trees just 2 degrees Celsius cooler. 0000330143 00000 n The discs that are visible are the outer covering that the adults produce to protect themselves. Maple (Acer) is the most common genus of deciduous street tree planted in eastern North America (Raupp et al. By June individuals become mature and egg sacs become noticeable. Female armored scale insects are only mobile as crawlers (Figure 5). Crawlers of this scale are active now and can be seen on bark and under scale covers. Painted maple aphids are common on maple trees and do not generally require treatment. 0000009648 00000 n Monitoring: Look for scales from about mid August. Crawlers should be out in early July. Flip A single female can lay up to 500 eggs in one season and populations can explode into a 100,000 damaging insects in a short period of time. Early detection is … Management: Red maple trees planted in areas surrounded by impervious surfaces such as roads, buildings, and parking lots would be at more risk of gloomy scale threat. GLOOMY SCALE. This species overwinters as a small immature form and moves to find feeding spots in the spring. It is not unusual to find trees with nearly 100% of their trunk covered in scale. Gloomy scale (Melanaspis tenebricosus) is a par-ticularly widespread and damaging scale found primarily on red, silver and Freeman maples as well as boxelders (Figure 1). Seems that Gloomy Scale insects have been spending the winter snuggled up in their arboreal homes, and are about ready to resume development next month with their first offspring crawlers showing up in May. 0000010700 00000 n Gloomy scale crawlers begin emerging in May. Almost 40% of the Clemson Plant and Pest Diagnostic Clinic sample submissions for home landscapes during 2012 and 2013 were scale insect pests, and of these, almost 90% of the species were the more difficult to control armored scales. Crawlers emerge from under the shells of the adult females beginning in late May in the Carolinas and in early July in Maryland. 0000516189 00000 n Please fill out the form below to sign up for the Virginia Green newsletter: Horticultural Oil on Landscapes around Commercial Lawns, Importance of Late Fall Liquid Fertilization, Disease on Commercial Lawns and Our Estate Lawn Care Program. Crawlers of this scale are active now and can be seen on bark and under scale covers. Female scale insects go through three general life stages: egg, nymph, and adult. Gloomy scale (Figure 3) is a particularly widespread and damaging scale on red, silver, and Freeman maples. Crawlers appear at about the same time, with adults in mid August. Painted Maple Aphids . The bark becomes a blackish grey with molds and course from the armor of the scales. You can spray with a summer rate oil spray when the crawlers are active (July-August). 0000000016 00000 n It is also found on sugar maple, hackberry, elm, boxelder, sweetgum, redbud, buckthorn, gallberry, mulberry, and soapberry. You can spray with a summer rate oil spray when the crawlers are active (July-August). By June individuals become mature and egg sacs become noticeable. Gloomy scale. 0000010287 00000 n Crawlers emerge June/July/August (eggs hatch in 24-48 hours). 0000021093 00000 n 0000020727 00000 n Gloomy scale ( Melanaspis tenebricosa) is one of these. The females are circular and brown to gray. These insects increase by one generation every year. The female is protected under a 1/8” diameter grey covering that blends into the bark and often goes unnoticed until infestations become quite heavy. Almost 40% of the Clemson Plant and Pest Diagnostic Clinic sample submissions for home landscapes during 2012 and 2013 were scale insect pests, and of these, almost 90% of the species were the more difficult to control armored scales. Crawlers and nymphs can be observed during the summer, however. It is an armored scale which secretes a … Many armored scales are serious pests of ornamental shrubs, trees, groundcovers and turfgrasses in South Carolina. Crawlers are produced until the middle of August at which time practically every stage of development can be found. Obscure Scale Trees planted after July could not … scales fall off, white or pale rings are left behind and become highly visible. Scale insects look more like tiny, immobile bumps growing on parts of the tree, rather than actual insects. 0000004855 00000 n CALL TO MEET WITH AN ARBORIST 704.525.3066 Charlotte 828.231.6008 Asheville 704.892.8927 Lake Norman Contact Us Armored Scales Trees and Shrubs at risk – Many of our common landscape trees and shrubs are susceptible to armored scale 0000024348 00000 n The crawlers’ jobs are to find a new spot to feed before settling down to build a test and feed. One of the most common of all diseases that affects maples are the gloomy scale. Crawlers are produced until the middle of August at which time practically every stage of development can be found. Treatment Strategy. Gloomy scales overwinter as adults and development resumes in April and the first crawlers are produced in May. The bark becomes a blackish grey with molds and course from the armor of the scales. From: Adam Dale, Graduate Student, and Steve Frank, Extension Entomolo-gist . Read the label VERY CAREFULLY for air temperature limits when you spray. h�b```f``������;�A��XX����������L=/. Gloomy scale can be difficult to manage after the populations have been established. %PDF-1.4 %���� Male scale insects are morphologically different from females. 2006). While, gloomy scale has been observed feeding on many tree species, urban red maples are the most commonly attacked plant. Gloomy scales overwinter as adults and the first crawlers are produced in May. 0000328422 00000 n Crawler sprays . Gloomy scale has one generation per year. Gloomy Scale: As discouraging as it sounds . This is a native species of scale that is usually kept under control by native parasites and predators. 144 0 obj <> endobj xref Trees planted after July could not … How to Treat Scales on Trees. 10 Gloomy Scale Melanaspis tenebricosa 1500-2500 - - Mid-July 11 Golden Oak Scale Asterolecanium variolosum 300-1266 - - Late-May 12 Hemlock Scale Abgrallaspis ithacae 1388-2154 - - July 13 Holly Pit-making Scale Asterodiaspis puteanum 802-1266 - - Late-June 14 Ceroplastes ceriferusIndian Wax Scale 700-1200 - - Mid-June Crawlers are produced until the middle of August at which time practically every stage of development can be found. A single female can lay up to 500 eggs in one season and populations can explode into a 100,000 damaging insects in a short period of time. The insects are perfectly camouflaged to match the bark of the tree branches and crowd together in … Read the label VERY CAREFULLY for air temperature limits when you spray. 0000023857 00000 n 0000008564 00000 n Virginia Green can inspect your landscape for Gloomy Scale and other landscape problems. 2013), trees planted before the end of July could have been colonized by gloomy scale in the year of planting. Overwinter as mated females. Gloomy Scale Bradley Seay, Bartlett Tree Experts, found gloomy scale on red maple (A. rubrum) on May 25 in Crofton. As you might expect, they can crawl, but they’re also spread around by wind. Street trees are particularly prone to gloomy scale. 0000023503 00000 n 0000738253 00000 n 0000006273 00000 n Early detection is critical for … In its adult phase it has a tiny, gray, circular body about the size of the tip of a ball point pen. 0000018745 00000 n Gloomy scale Melanaspis tenebricosa Order Hemiptera, Family Diaspididae; armored scales Native pest Host plants: Red and silver maples are preferred, but boxelder, catalpa, elm, hackberry, mulberry, and sy- camore are also susceptible. One of the reasons we have found this to be such a pest is that female gloomy scales produce about 3 times as many eggs when they live on relatively warm trees (like in a parking lot) than when they live on cooler trees (like in a shady yard). The crawlers are yellow and tiny (1/64th inch long). Gloomy scale. Seems that Gloomy Scale insects have been spending the winter snuggled up in their arboreal homes, and are about ready to resume development next month with their first offspring crawlers showing up in May. There is one generation each year, but crawlers can be active over a long period of time. The females of this armored scale are still in the 3rd instar stage. Gloomy Scale Crawlers are Active Gloomy scale, Melanaspis tenebricosa, is an armored scale that is found on maples and other tree species. The mobile crawlers do not produce protective covering on the body. Gloomy scale is very difficult to manage after populations are established. 0000004248 00000 n Maples have esthetic and horticultural qualities that make them popular among homeowners, landscape professionals, and landscape designers. 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Males gloomy scale crawlers through gloomy scale is a soft scale that is usually kept under control by native parasites predators! On maples and can be difficult to manage after the populations have been by... Rate oil spray when the crawlers are produced in May maple ( A. rubrum ) on May 25 in.... Time practically every stage of development can be found Carolinas and in early summer, generally late May through (. For a free tree and shrub analysis and legless whereas males develop wings and legs have.