In the 2014 treatments, neither the systemic root drench of Kontos nor the foliar applied spray of Kontos or M-Pede significantly reduced the percentage of live scales by the end of the evaluation compared to the untreated control trees. Scales are most commonly found on bark but can be found on leaves, in particular, leaves of infested magnolias. I am a maple fanatic and constantly monitoring their growth and appearance. Provide Japanese maple trees appropriate irrigation so they resist scale damage. The scale bug is small, oval and flat, with a protective tan to brown shell-like covering (scale). 0000074135 00000 n Two blocks of field grown, naturally infested “Kwanzan” cherry trees (2.5–3.0 in diameter, planted at 6 ft row spacing with 6 ft between trees) were used in the evaluation. Japanese beetles are big, shiny and cling to trees by the thousands. In both 2014 and 2015, experimental units were individual trees and each treatment was replicated on four trees. Japanese maple scales typically infest the trunk and branches of trees but have been observed on leaves in heavy infestations. You’ll have to use a combination of DIY essential oils, sticky traps, and horticultural oil. pest One of its advantages is its wide host range, which allows it to spread and establish easily in. Important landscape hosts include: apple, ash, camellia, cherry, cotoneaster, crabapple, dogwood, elm, euonymus, holly, honeylocust, hornbeam, Itea, lilac, linden, magnolia, maple, pear, privet, pyracantha, redbud, serviceberry, stewartia, styrax, yellowwood, and zelkova. Published by Oxford University Press on behalf of the Entomological Society of America. Prune out dead branches with scales. The small, brown, 1/8 inch long flattened scale overwinters as an inconspicuous, immature female on the bark of twigs and branches. 0000074066 00000 n Let’s learn more about identifying scale and how to control them. 0000010415 00000 n At 30-day intervals post-treatment, the percentage of live JMS was determined by taking branch samples from each tree to the laboratory and examining the individual scales under a dissecting microscope. 0000004871 00000 n Look for this scale on Japanese maple, American red maple, dogwood, zelkova, lilac, yellowwood, pyracantha, privet, holly, euonymus, redbud, stewartia, cherry, magnolia, Itea, and styrax. JMS is an oystershell-like armored scale and mature female scales measure 1–2 mm long. 0000291429 00000 n Japanese Maple Scale. The waxy coating over the body is white, but the female, eggs and crawlers are lavender in color (Figures 2 and 3). Karla Addesso, Adam Blalock, Paul O'Neal, Japanese Maple Scale In-Field Insecticide Trials , Arthropod Management Tests, Volume 41, Issue 1, July 2016, tsw046, https://doi.org/10.1093/amt/tsw046. 0000192467 00000 n trailer %%EOF Constant agitation is required. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide, This PDF is available to Subscribers Only. What to look for when scouting for tree insects, in this case, shiny sticky spots on Maple leaves. 0000004257 00000 n Japanese maple scales small size, ability to blend in, and long crawler emergence period make it difficult to control. Each mass usually contains 1,000-1,500 eggs. This condition means the female is covered dorsally by the thickened second shed exoskeleton, and this covering is opened beneath. 0000094937 00000 n The female's body color is purple (Fig. Oxford University Press is a department of the University of Oxford. They use piercing-sucking mouthparts to penetrate the tree tissue and feed on parenchyma cells just beneath the bark. control. Treatments were made on June 8 th . If a sprayer has been idle You’ll see these females in early summer, followed by scale crawlers hatching in late June or early July and crawling around on the undersides of the leaves. All of these pests present as tiny bumps or cottony dots on twigs and on leaves. They are easy to … In 2014, systemic drench and trunk spray applications of Kontos were tested along with trunk sprays of M-Pede and Safari 20 SG. 0000001828 00000 n Tristar-treated trees however, showed a substantial increase in live scale to levels seen the previous March, four times as high as control trees. h�b``�```3a`c`. 30 0 obj <> endobj Scale insects thrive in warm, dry environments. Japanese maple scale ( Lopholeucaspis japonica) is a challenging scale to manage. Japanese maple scale (JMS) has become a difficult and expensive pest to control in many Tennessee nurseries. Systemic insecticides should be applied at the very first sign of crawler activity and should provide control of … Other Japanese maple pests are scale, mealybug and mites. In 2015, trunk spray applications of Duraguard ME and Tristar were also evaluated. You can also use a garden hose to blast them off on a daily basis- twice per day. 0000013538 00000 n Of the two treatments tested in 2015, Duraguard ME had a lower percentage of live scales compared with control trees at 60 and 90 days, but the difference was not significant. The study was carried out at a commercial field nursery operation in Warren County, McMinnville, Tennessee. The objective of our study was to evaluate the efficacy of five insecticides to reduce populations of JMS in nurseries. Immature females are flat and inconspicuous. Identify cottony maple scale (Pulvinaria innumerabilis), the most common scale insect species to infest maple trees, by their adult female scales with cotton-like egg sacks on their hind ends. Scale insects suck sap from plants, robbing them of essential nutrients. 0000009676 00000 n Releasing ladybugs (a predator of aphids) will control populations. 0000010256 00000 n The insect is Japanese maple scale (Lopholeucaspis japonica Cockerell), and, unfortunately, it infests many more plant species than just Japanese maple. In trials conducted in 2013, dinotefuran performed well in controlling Japanese maple scale on infested crabapple trees. 0000033041 00000 n xref Japanese maple scale has several, characteristics which make it a successful insect. 0000014135 00000 n Data were arcsine transformed before analysis by a general linear model and means separated with a post hoc tukey's test (Proc GLM, SAS Institute, Inc.). Hand removal can be an effective method for small-scale control of Japanese beetles. 30 56 Search for other works by this author on: © The Author 2016. Mature females are pale to dark brown, convex, and about 3-6 mm long (Fig. Introduced into the San Francisco area in the early 1900’s, it has continued to spread throughout the Pacific Coast states and several eastern states, including Pennsylvania, Maryland, Delaware, Virginia, and Long Island. Cottony maple scales can reach epidemic numbers on silver maple, but noticeable populations can occur on other species of soft maple. I'm sure I can come up with a proper solution to control this scale, ... Becuse of this I am looking for one that may have had a practical experiense with scale on japanese maples and hopefully a … 0000002000 00000 n Heavy infestations will require a spraying of either a horticultural oil or a neem oil. Scales tend to thrive on stressed plants. Male scales are tiny, winged insects. Japanese maple scale (JMS) is a small oystershell shaped, armored scale (Figure 1). The eggs hatch into pale yellow-green crawlers in late June or July and migrat… 0000094618 00000 n However, over-fertilization favors scale buildup. While the control trees initially had very low numbers of live scale, populations increased as the season progressed. 0000006629 00000 n Treatments were assigned to trees under a RCBD. The body enlarges several times greater than the overwintering scale, resembling a kernel of popcorn. 0000003451 00000 n Scale insects are common landscape pests, but many people don’t see them until it’s too late, which comes when scales drain their host plant of energy, and they begin dropping leaves or dying. Japanese maple scale (JMS) has become a difficult and expensive pest to control in many Tennessee nurseries. While these Japanese maple pests can attack a tree of any age, they are usually found in young trees. 0000140354 00000 n Japanese maple scales can feed on dozens of plant species including red maple, Japanese maple, dogwood, redbud, elm, Itea, and broadleaf evergreens like cherry laurel, holly, Japanese holly, and boxwood. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (, Evaluation of Best Use Practices for Spear-T in Season-Long Control Programs for Spotted-Wing Drosophila Adults in Georgia Blueberries, 2020, Evaluations of Insecticide Performance for Control of Pecan Weevil and Hickory Shuckworm, 2019, Evaluations of Insecticide Performance for Control of Alfalfa Weevil and Aphids, 2020, Efficacy of Soil and Foliar Applied Registered and Experimental Materials on Green Peach Aphid and Tobacco Flea Beetle, Cranberry Toad Bug Control on Cranberries, 2016–2017, About the Entomological Society of America, http://creativecommons.org/licenses/by-nc/4.0/, Receive exclusive offers and updates from Oxford Academic, Copyright © 2020 Entomological Society of America. Japanese maples (Acer palmatum) are native to Japan, China, North Korea and South Korea, and they have colorful foliage. I had a Japanese maple almost killed in my landscape by this scale until I got it under control. Beetles can easily be removed by shaking the plants or plant parts over a collecting container filled with … Following a recommended fertility program and watering regime will promote plant health. 0000385585 00000 n Japanese maple : Virginia creeper : Mechanical/Physical Control of Japanese Beetle. Japanese Maple Scale: Japanese maple scale (JMS) is an armored scale that was first introduced to the eastern United States in the early part of the 20thcentury. Systemic and trunk applied insecticides for control of Japanese maple scale. 0000005896 00000 n The female is described as being pupillarial. It is also known to be able to survive on other deciduous trees and shrubs including honey and black locust, white ash, euonymus, oak, boxelder, dogwood, hackberry, sycamore, linden, beech, elm, willow, basswood, poplar, rose and sumac. Snip off infested branches and twigs to control spread, and prune branches to open up the canopy and allow sunlight to enter. And, they accumulate on the interior branches because these are the oldest and so have been exposed to more scale generations. The following is more information. 2). 0000095217 00000 n Scale, all types Euonymus scale on Manhattan and burning bush White peach tree scale Japanese Maple Scale – see the handout “Scale- White peach & Japanese Maple on the web site or request it for more specific details on control. 0000003876 00000 n They often produce a honeydew which attracts another Japanese maple problem, sooty mold. 0000211391 00000 n 0000005405 00000 n Based on preliminary observations in 2015, a late frost event in April reduced live scales from around 30% to approximately 5% at the time of summer application. The crawler (first instar nymph) stage of this scale insect is whit… M-Pede and Kontos failed to reduce the relative percentage of live scale when applied as trunk sprays compared to control trees. Calico scale, Eulecanium cerasorum is a pest of variety woody plants. * Lowercase letters indicates the treatment is significantly different by Tukey's Test ( P  < 0.05). 1). Lady beetles and chrysopids were observed feeding on JMS in our field plots, which may have also contributed to the slower increase in live scales in the control treatment and the lack of significant difference between the control and Duraguard ME treated 1 trees. JMS is an oystershell-like armored scale and mature We use cookies to enhance your experience on our website.By continuing to use our website, you are agreeing to our use of cookies. 0000153338 00000 n Clothianidin provided somewhat greater control than dinotefuran. Scale bug insect is out in numbers on this Japanese Maple Acer Shirasawanum Aureum on the 29th April 2018, more so than last year. 0000005370 00000 n 0000073971 00000 n The second shed exoskeleton is elongate and reddish brown. The Kontos drench application was made on April 24 th , 2014 at a rate of 0.5 g a.i./ in trunk diameter, corresponding to the 20 gallon container drench rate since field drench rates are not currently labeled. 0000002471 00000 n 0000010889 00000 n Eggs masses are conspicuously white and cottony in appearance. 0000005672 00000 n 0000007616 00000 n Severely prune back heavily infested branches and protect new growth with insecticide applications. 0000010440 00000 n Japanese maple scale seems to be a growing problem, mostly on the east coast. 0000006905 00000 n for discrete circular holes in scale covers that indicate parasitoids are attacking the JMS population. 0000115825 00000 n JMS is easily obscured by plant foliage and blends in well with light-colored bark making it difficult to detect until populations grow large. By late May or early June the female scale has matured and begins to lay hundreds of eggs within a white frothy wax. Management Mechanical: Use a high pressure water spray or gentle scrub brush with water to remove scale covers from trunks of trees to improve aesthetic appearance and/or reduce populations. Round Mites & Pests of Japanese Maples. 0000153269 00000 n 0000001416 00000 n 0000171344 00000 n Japanese Maple Scale This scale has become the number one scale in nurseries and landscapes over the last 5 years - so pay attention and watch for this scale. If practical, improve plant sites to reduce stress and promote growth. 0000140258 00000 n 0000216204 00000 n In the United States, it was first found on the east coast, but is rapidly expanding its range. 0000171517 00000 n Scale insects can quickly destroy your plants, ... Other species of wax scales include tree dwellers like the cottony maple scale (Pulvinaria innumerabilis) or the calico scale ... but sometimes you can control scale by washing the leaves or stems/branches with no more than water and your hands. Japanese Maple Scale (Lopholeucaspis japonica (Cockerell)), Family Diaspididae Plants Damaged: Japanese maple scale is showing up in more and more landscapes and nurseries lately. ... JAPANESE MAPLES PESTS AND DISEASES 0000002838 00000 n 0000210669 00000 n 0000171048 00000 n 0000013804 00000 n Place sticky material around the trunk of the maple tree to prevent ants from climbing and going towards the honeydew, or use ant stakes or baits. 0000380662 00000 n 0000006157 00000 n Japanese maple scale is a major problem in the landscape. Japanese maple scale was probably introduced to the U.S. from Asia and has been found in most eastern U.S. states from Connecticut to Georgia and west to the Mississippi. The eggs beneath the waxy covering of the female are white with a purple hue. This research was supported by industry gifts of Tristar and Duraguard ME. This increases mortality rate of aphids and scale due to heat exposure. 0000000016 00000 n Transcription. This type of scale insect is known as an armored scale because the insects protect themselves underneath an armored cover that is usually white in color. Scopri Japanese Maples: The Complete Guide to Selection and Cultivation di Vertrees, J. D., Gregory, Peter: spedizione gratuita per i clienti Prime e per ordini a partire da 29€ spediti da Amazon. landscapes and nurseries The scale s known host, range includes trees and shrubs in more than 16. genera in 13 families including Acer, Amelanchier Camellia Carpinus Cercis. Other pests, though, are hard to see. The reproductive potential of JMS is enormous. 0000005783 00000 n 0000010281 00000 n The cottony maple scale is most easily recognized by the characteristic egg masses on twigs and branches. Application Oil and water separate rapidly. 0000285543 00000 n startxref Adult Japanese maple scales are less than 2 mm long and oyster-shell shaped. 0000170635 00000 n 0000032794 00000 n Scales are difficult to control especially on larger trees like Japanese maple. Safari reduced the percentage of live scale compared to controls at 30 days but this effect did not last through the season. Summer trunk applications targeting active crawlers were made on June 4 th , 2014, with a CO 2 backpack sprayer to runoff. The 1-2 mm long, oystershell-shaped, waxy test (covering) of the female is grayish white (Fig. 1). The insect’s small size and ability to blend in with natural variation in bark coloration make it a challenging scale to detect until populations are high and the scale has spread to large For full access to this pdf, sign in to an existing account, or purchase an annual subscription. 0 Scale sounds and looks a lot like a plant disease, but the term actually refers to infestation by any one of more than 7,000 species of tiny sap-sucking insects.Scale insects typically adhere to the stems, branches, and sometimes the leaves of plants to feed on sap, and they have a shell-like bump appearance, which sometimes causes them to be mistaken for a fungal or bacterial disease. 4 Spray your Japanese maple … A minimum of 100 individual scale covers were carefully flipped over using an insect pin to determined survivorship. <]/Prev 806321>> Ladybugs and parasitic wasps are highly effective, natural ways to get rid of scale, according to the University of California IPM Online. 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Very first sign of crawler activity and should provide control of Japanese beetles are big, shiny and cling trees... Sign in to an existing account, or purchase an annual subscription, according to the University of California Online... The cottony maple scale ( JMS ) is a pest of variety woody plants pdf, sign to. Effect did not last through the season eggs beneath the bark pin to determined survivorship from plants, them! Ways to get rid of scale, mealybug and mites scale and mature female measure! Rapidly expanding its range on maple leaves crabapple trees plants, robbing them of essential nutrients and constantly monitoring growth. To evaluate the efficacy of five insecticides to reduce the relative percentage of live scale compared to at. Infested crabapple trees since then, it has spread to many areas of the country including... Because these are the oldest and so have been exposed to more scale generations units were individual trees each! 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Though, are hard to see irrigation so they resist scale damage, resembling a kernel of popcorn palmatum are... The body enlarges several times greater than the overwintering scale, according to the University California. Scale is most easily recognized by the thickened second shed exoskeleton, and prune branches to up... And reddish brown matured and begins to lay hundreds of eggs within a white frothy wax natural to..., Tennessee control populations they resist scale damage County, McMinnville, Tennessee four.. Beetles are big, shiny sticky spots on maple leaves purchase an annual subscription first sign crawler. Evaluate the efficacy of five insecticides to reduce the relative percentage of scale! County, McMinnville, Tennessee penetrate the tree by robbing it of nutrients energy. Purple ( Fig scale on infested crabapple trees small, oval and flat with. Spray applications of Kontos were tested along with trunk sprays compared to control Figure 1 ) a maple fanatic constantly... A horticultural oil or a neem oil scale, Eulecanium cerasorum is a pest variety! These are the japanese maple scale control and so have been observed on leaves in heavy.. Insecticides for control of Japanese maple pests can attack a tree of any age, they are found! Tree of any age, they japanese maple scale control usually found in young trees 1–2 long!, 2014, with a protective tan to brown shell-like covering ( scale ) woody plants killed my. Them off on a daily basis- twice per day of DIY essential oils, sticky traps, horticultural... Twigs and branches JMS ) has become a difficult and expensive pest to control palmatum ) are native Japan! Leaves of infested magnolias were made on June 4 th, 2014, with a purple hue 1.. Scale due to heat exposure interior branches because these are the oldest and so have been to! To blast them off on a daily basis- twice per day a major problem in the United,! Pdf, sign in to an existing account, or purchase an annual.., McMinnville, Tennessee oil or a neem oil Warren County, McMinnville, Tennessee on silver,... Can occur on other species of soft maple by Oxford University Press on behalf of the country, Tennessee! Rapidly expanding its range scouting for tree insects, in this case, shiny sticky spots maple. The female 's body color is purple ( Fig maple fanatic and constantly their... Let ’ s learn more about identifying scale and how to control in many Tennessee nurseries to many of... But this effect did not last through the season progressed will promote plant health masses conspicuously...