The adult beetle is black with a red spot on each wing. There are hundreds of Japanese maple varieties that come in various sizes with a large assortment of leaf shapes and colors that range from shades of green to orange, red, purple, and variegated. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). Two-Lined Chestnut Borer Diagnostic Guide . Japanese maple scale (JMS), Lopholeucaspis japonica (Cockerell), is a non-native pest from Asia and was first detected in Connecticut in 1914. Feeding injury may cause foliage to drop prematurely giving the crown of an infested plant a thin appearance. The life history of this scale insect is not well known in the United States. Introduction. Thorough applications of dormant oil at 2-3% in late winter are an important component of achieving successful control. Beneath this outer shell, the adult and nymph scales are lavender in color. Rugose Spiraling Whitefly Diagnostic Guide . Japanese maple scale seems to be a growing problem, mostly on the east coast. Many types of scale insects exist, grouped into two main categories: armored scales and soft scales. Japanese maple scale (JMS), Lopholeucaspis japonica (Cockerell), is a non-native pest from Asia and was first detected in Connecticut in 1914. JMS can infest a wide range of woody ornamental plants commonly found in nurseries and landscapes. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). Scale, Mites, and Aphids are insects that can occasionally affect Japanese Maples. The eggs hatch into pale yellow-green crawlers in late June or July and migrat… The waxy coating over the body is white, but the female, eggs and crawlers are lavender in color (Figures 2 and 3). Japanese maple scale (Lopholeucaspis japonica), also known as Japanese scale or pear white scale, is an invasive pest that infests a wide range of woody plants.The insect is native to Japan. The crawler (first instar nymph) stage of this scale insect is white. This insect sucks out plant juices using its piercing and sucking mouthparts. 1). These beloved ornamental trees are prized for their vivid foliage: red Japanese maple leaves create a beautiful summer to fall accent. In some cases, … For trees, meanwhile, scouting should take place on the trunks and scaffold branches, particularly at the branch collar. By late May or early June the female scale has matured and begins to lay hundreds of eggs within a white frothy wax. The body enlarges several times greater than the overwintering scale, resembling a kernel of popcorn. Japanese maple scale (JMS) is a small oystershell shaped, armored scale (Figure 1). Japanese Maple Scale. Soil-applied, systemic insecticides may not be as effective in managing this species since it develops mostly on the twigs, branches, and trunks of host plants. Scales are difficult to control especially on larger trees like Japanese maple. Tom Glasgow County Extension Director Friday Sep 11, 2020 at 10:20 AM. Do not contaminate forage, streams, or ponds. Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. This scale insect probably was an unintentional introduction into the United States from Asia. Japanese Maple Scale (Lopholeucaspis japonica (Cockerell)), Family Diaspididae Plants Damaged: Japanese maple scale is showing up in more and more landscapes and nurseries lately. The 1-2 mm long, oystershell-shaped, waxy test (covering) of the female is grayish white (Fig. They often produce a honeydew which attracts another Japanese maple problem, sooty mold. Adult males are on host plants from late April to late May. Beneath this outer shell, the adult and nymph scales are lavender in color. The insect is native to Japan. Japanese Maple Scale (Lopholeucaspis japonica): A Pest of Nursery and Landscape Trees and Shrubs Introduction Over the past several years the exotic Japanese maple scale (JMS), Lopholeucaspis japonica (Cockerell) (Hemiptera: Diaspididae), has become a pest insect of major concern to nursery crop producers and … Japanese maple scale (JMS) is a small, oystershell-shaped, armored scale (Figure 1). Japanese Maple Scale Diagnostic Guide . Read and follow directions and safety precautions on labels. It's relatively new to Ohio, its name is misleading, and it may be mistaken for other more familiar scales. This pest overwinters as females. The Janka test measures the amount of force required to embed a 0.444" steel ball into the wood to half of its diameter. Japanese maple scales small size, ability to blend in, and long crawler emergence period make it difficult to control. The Japanese maple scale, Lopholeucaspis japonica, is a recently detected pest of a wide range of woody host plants in Pennsylvania. … Japanese Maple Scale: A Nursery and Landscape Pest Shimat V. Joseph and Will Hudson, Department of Entomology T he Japanese maple scale (JMS), Lopholeucaspis japonica Cockerell (Figure 1), is an insect pest of Japanese maples and several other ornamental tree species. Once you know the soil pH, if necessary, you can adjust the pH to meet the needs of your Japanese maple. Japanese maple scale is showing up in more and more Henderson County landscapes. The major scale insect pests are cottony maple, cottony camellia, oleander, and cottony taxus scale. The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. Dry soils can lead to leaf scorch. Horticultural oil (at 0.5 to 1 percent) can be tank-mixed with Distance or Talus 40SC for improved control. Japanese maple scale is showing up in more and more Henderson County landscapes. This pest is difficult to effectively manage. One female will lay an average of 25 eggs. This tiny insect can also attack Japanese maple, red maple, dogwood, lilac, zelkova, yellowwood, pyracantha, privet, euonymus, redbud, stewartia, cherry, magnolia and Itea. Japanese maple scale (JMS) is an armored scale that was first introduced to the eastern United States in the early part of the 20thcentury. Female scales are 1-2 mm long while males are slightly smaller. Japanese maples do best in a partly shaded site with a consistent supply of water. Dispose of empty containers right away, in a safe manner and place. Proper pruning of Japanese maple is essential for tree health. Aphids often feed on leaves producing honeydew that encourages the growth of black sooty mold fungus on other leaves or on surfaces beneath the tree. How-to: Planting and Caring for Japanese Maple Trees. JMS can infest a wide range of woody ornamental plants commonly found in nurseries and landscapes. Get notified when we have news, courses, or events of interest to you. The waxy coating over the body is white, but the female, eggs and crawlers (the immature stage) are lavender (Figures 2 and 3). Acer palmatum 'Calico' This is a very pretty little tree. Note the purple color of this life stage. Japanese maple scale: not a picky eater . Japanese Red Maple Acer palmatum atropurpureum Z 5-8 . 2). There is limited understanding of the life cycle of this pest, but in the colder climates of New England, JMS is likely to have only one generation and is thought to overwinter as fertilized adult females. This is a challenge in JMS management because: (i) crawler hatch is staggered over several weeks; and (ii) once the crawlers establish in place they begin to form their wax coverings in only three days. The waxy covering of the male is the same color as the female, but it's smaller. As a solitary specimen it is breathtaking, its fall foliage remaining for weeks, then falling into a brilliant pool of crimson, orange, or gold on the garden floor. See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement. Because JMS, similar to other armored scales, does not directly feed on the … When monitoring for this species on trees and shrubs, examine the trunk, branches, and twigs particularly at the branch collar where this pest often se… Japanese Maple Scale. Aphids. The second shed exoskeleton is elongate and reddish brown. It is most effective to scout for JMS in the dormant season when it is easier to see the bark, especially on shrubs with dense canopies. Two generations of egg laying occurs in southeastern and mid-Atlantic states, but in New England it's possible there is only one generation per growing season. The Japanese maple scale may be confused with another group of armored scale insects on woody ornamental plants in Pennsylvania known as the white prunicola scale, Pseudaulacaspis prunicola, and the white peach scale, P. pentagona. Also of interest is the hues of pale yellow on the bark. The life history of this scale insect is not well known in the United States. Scale management is difficult but an incorrect identification can make it impossible. ; privet, Ligustrum sp. This insect sucks out plant juices using its piercing and sucking mouthparts. The Janka scale is used to determine the relative hardness of particular … ; crabapple, Malus sp. Additionally, the clusters of white prunicola scale and white peach scale male's waxy covers give the host plant bark a white, woolly appearance. The Japanese maple scale is a recently detected pest of a wide range of woody host plants in Pennsylvania. Tom Glasgow County Extension Director Friday Sep 11, 2020 at 10:20 AM. Not all of the insect samples submitted to our office can actually be identified here, and not all can be identified from images submitted to our entomologists on campus. As with other armored scales, timing of pesticide applications should coincide with crawler activity since the sprays cannot penetrate the adult scales' waxy, protective shell. Observations made on this pest in Pennsylvania indicate that it produces one generation each year. Authored by: Gregory A. Hoover, Sr. Extension Associate. The Japanese maple scale (JMS), Lopholeucaspis japonica Cockerell, is an insect pest of Japanese maples and several other ornamental tree species. Japanese maple trees can provide a striking focal point, be the perfect plant to set off a large container, or grow into an impressive bonsai specimen. ; and ornamental pear, Pyrus sp. Fall brings wonderful shades of orange. Japanese maple (Acer palmatum) is a sturdy little ornamental tree, popular for its graceful shape, deep fall color and delicate, lace-like leaves. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). In 1914, Japanese maple scale was discovered in the United States. Scales are most commonly found on … This condition means the female is covered dorsally by the thickened second shed exoskeleton, and this covering is opened beneath. In 1914, Japanese maple scale was discovered in the United States. Classic Japanese maple trees (Acer palmatum) bring timeless elegance to gardens, yards, borders and even patio containers. The small, brown, 1/8 inch long flattened scale overwinters as an inconspicuous, immature female on the bark of twigs and branches. Other Japanese maple pests are scale, mealybug and mites. Japanese Maple Scale (Lopholeucaspis japonica (Cockerell)), Family Diaspididae Plants Damaged: Japanese maple scale is showing up in more and more landscapes and nurseries lately. ; Pyracantha sp. This insect sucks out plant juices using its piercing and sucking mouthparts. LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, J.A. It's relatively new to Ohio, its name is misleading, and it may be mistaken for other more familiar scales. Japanese Maple Scale FS-967-2013 Over the past several years, nursery crop producers and landscape managers in Maryland and the eastern U.S. have become increasingly concerned about the pest insect, exotic Japanese maple scale (JMS), Lopholeucaspis japonica(Cockerell) (Hemiptera: Diaspididae). Annual light pruning is preferred to Scale management is difficult but an incorrect identification can make it impossible. Japanese maples prefer a moderately acid to neutral soil ranging from 6.0 to 7.0 on the pH scale. The scale … This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. This scale insect may be easier to detect in the dormant season when the foliage does not prevent a clear view of the woody regions of a deciduous plant. This pest has been collected in Connecticut, Delaware, Georgia, Kentucky, Louisiana, Maryland, New Jersey, New York, North Carolina, Rhode Island, Tennessee, Virginia, and Washington, D. C. This species has been reported in the literature to feed on host plants in 16 genera in 13 plant families. Scale management is difficult but an incorrect identification can make it impossible. To prevent spread of JMS to healthy trees covered dorsally by the thickened shed... 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