Armored scales injure host plants by inserting their threadlike, piercing-sucking mouthparts into non-vascular plant cells and withdraw vital nutrients necessary for plant growth from mesophyll cells. This tiny insect can also attack Japanese maple, red maple, dogwood, lilac, zelkova, yellowwood, pyracantha, privet, euonymus, redbud, stewartia, cherry, magnolia and Itea. It was first reported in Connecticut. Few plants can equal the beauty and command of a Japanese Maple in the autumn landscape. Handle carefully and store in original labeled containers out of the reach of children, pets, and livestock. Cooperative Extension Japanese Maple Scale in the Nursery Karla … The average size of a mature Japanese Maple is between 15-25'. The crawlers are active from late May through early August. All of these pests present as tiny bumps or cottony dots on twigs and on leaves. While these Japanese maple pests can attack a tree of any age, they are usually found in young trees. The Japanese maple scale (JMS), Lopholeucaspis japonica Cockerell, is an insect pest of Japanese maples and several other ornamental tree species. For severe infections you can use pesticides like carbaryl, also known as Sevin. Treat infested host plants when the crawlers are active from late May through mid-August. 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: not a picky eater . Proper pruning of Japanese maple is essential for tree health. For trees, meanwhile, scouting should take place on the trunks and scaffold branches, particularly at the branch collar. They are easy to spot on the stems of trees with dark bark. ©2020 University of Massachusetts Amherst • Site Policies, Center for Agriculture, Food, and the Environment, Center for Agriculture, Food and the Environment. Why do we need this? Although generally hardy, Japanese maples can suffer from a number of insect pest infestations, including infestations by both soft and armored scales. 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… ; Cotoneaster sp. Japanese Maple Scale (Lopholeucaspis japonica (Cockerell)), Family Diaspididae Plants Damaged: Japanese maple scale is showing up in more and more landscapes and nurseries lately. Tom Glasgow County Extension Director Friday Sep 11, 2020 at 10:20 AM. Japanese maple scale is showing up in more and more Henderson County landscapes. Since then, it has spread to many areas of the country, including Tennessee. 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. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). The female is described as being pupillarial. It's relatively new to Ohio, its name is misleading, and it may be mistaken for other more familiar scales. The 1-2 mm long, oystershell-shaped, waxy test (covering) of the female is grayish white (Fig. Japanese maple scale (JMS), Lopholeucaspis japonica (Cockerell), is a non-native pest from Asia and was first detected in Connecticut in 1914. In the United States, it was first found on the east coast, but is rapidly expanding its range. 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. Image 2 (bottom). It was first reported in Connecticut. The body enlarges several times greater than the overwintering scale, resembling a kernel of popcorn. Some of the lace leaf varieties of Japanese Maple only grow to 7'. Figure 1. Classic Japanese maple trees (Acer palmatum) bring timeless elegance to gardens, yards, borders and even patio containers. Japanese maple scales small size, ability to blend in, and long crawler emergence period make it difficult to control. Adult males are on host plants from late April to late May. Japanese maple scale (JMS), Lopholeucaspis japonica (Cockerell), is a non-native pest from Asia and was first detected in Connecticut in 1914. 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. Japanese maple scale (JMS) is an armored scale that was first introduced to the eastern United States in the early part of the 20thcentury. This insect pest is quite small and blends in well with host bark, allowing it to avoid detection until population levels are high. This site is maintained by Center for Agriculture, Food and the Environment in the College of Natural Sciences. This tiny insect can also attack Japanese maple, red maple, dogwood, lilac, zelkova, yellowwood, pyracantha, privet, euonymus, redbud, stewartia, cherry, magnolia and Itea. By late May or early June the female scale has matured and begins to lay hundreds of eggs within a white frothy wax. Observations made on this pest in Pennsylvania indicate that it produces one generation each year. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). Habitat. JMS have an oystershell-shaped body covered in a white, waxy protective coating. 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. Look for this scale on Japanese maple, American red maple, dogwood, zelkova, lilac, yellowwood, pyracantha, privet, holly, … Horticultural oil (at 0.5 to 1 percent) can be tank-mixed with Distance or Talus 40SC for improved control. The Japanese maple scale, Lopholeucaspis japonica, is a recently detected pest of a wide range of woody host plants in Pennsylvania. This insect sucks out plant juices using its piercing and sucking mouthparts. The second shed exoskeleton is elongate and reddish brown. In the spring, femal… 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. White Peach Scale Diagnostic Guide . This pest overwinters as females. Occasionally, Japanese maples are troubled by aphids, scale or powdery mildew, but these are easily treated and seldom kill the tree. Japanese maple scale: not a picky eater . 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. 1). The most common scale insects that infest maple trees are the armored varieties oystershell scale and scurfy scale, as well as the soft varieties cottony maple scale and lecanium scale. 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. 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 … Do not contaminate forage, streams, or ponds. This is sometimes the case with the exotic Japanese maple scale (JMS) (Lopholeucaspis japonica, family Diaspididae). Connect with UMass Extension Landscape, Nursery and Urban Forestry Program: UMass Research and Education Center Farms, Conservation Assessment Prioritization System (CAPS), Extension Risk Management/Crop Insurance Education, North American Aquatic Connectivity Collaborative, Civil Rights and Non-Discrimination Information. Be sure to apply any registered insecticide you select according to all label directions. How-to: Planting and Caring for Japanese Maple Trees. Japanese Maple Scale (Lopholeucaspis japonica (Cockerell)), Family Diaspididae Plants Damaged: Japanese maple scale is showing up in more and more landscapes and nurseries lately. Tom Glasgow County Extension Director Friday Sep 11, 2020 at 10:20 AM. The Japanese maple scale (JMS), Lopholeucaspis japonica Cockerell (Figure 1), is an insect pest of Japanese maples and several other ornamental tree species. View our privacy policy. The Janka scale is used to determine the relative hardness of particular … ; Japanese zelkova, Zelkova serrata; holly, Ilex sp. This scale insect is considered a serious pest of citrus and ornamental plants worldwide. The grayish white waxy tests (covers) of females on holly. ; crabapple, Malus sp. Dispose of empty containers right away, in a safe manner and place. This species has been identified feeding on red maple, Acer rubrum; Japanese maple, Acer palmatum; kousa dogwood, Cornus kousa; Euonymus sp. The crawler (first instar nymph) stage of this scale insect is white. Excessive loss of plant fluid reduces the growth and health of the plant. Feeding by the JMS causes reduced plant growth and vigor. Test measures the amount of sap learn HOW to STOP the INVASIVE SPOTTED LANTERNFLY Coronavirus... Select according to all label directions probably was an unintentional introduction into the wood to half of diameter. 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