Feeding damage may be noted before the actual insect is seen. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. The beetle’s wide distribution, particularly in western North America, increases the likelihood of this pest expanding its range in the Pacific Northwest. Our trees. The female beetles will lay their eggs in the cavities they chew into the stems. Some species of viburnum are more susceptible to the beetle than others. Building the urban forest for 2050. If left unchecked it can lead to the death of the shrub. Pupation takes about ten days. Hoebeke. Viburnum leaf showing the larvae and feeding damage, Close up of the larva of the viburnum leaf beetle. Explore this online platform for Chicago-area residents to share their favorite stories about trees. It targets a narrow range of host plants – in this case, as its common and scientific names imply, shrubs in the genus Viburnum. Susceptible species are eventually destroyed, but usually are not heavily fed upon until the most susceptible species are eliminated. In overall appearance, VLB resembles the elm leaf beetle (Pyrrhalta luteola Müller) except for minor differences in size and color. Posted: 2016 | Spring. In the United States it hasbeen found in only a few states, including New York, Ohio, Pennsylvania, Maine, Vermont and Massachusetts. They can be removed from October through April. Many more species of Viburnum are part of the horticultural trade and are present in landscape plantings throughout Minnesota. Selected reference: Weston, P.A., G. Desurmont, and E.R. Breeding populations actually became established in North America (near Ottawa, Ontario, Canada) in the late 1970s, but did not reach the U.S. until 1994, when it was discovered in Maine. Common Name: viburnum leaf beetle Family Name: Chrysomelidae - Leaf beetle family Species Code: PYVI1 Native range: Asia and Europe NJ Status: Widespread. Native plantings of arrowwood (Viburnum dentatum complex) in the park were found to be heavily damaged by larval … A few possible sightings of this pest were reported in 2013 an 2014. The user is responsible for determining that the intended use is consistent with the label of the product being used. It apparently survives fire by sprouting from underground rhizomes, but these are shallow and easily damaged and the species decreases with exposure to repeated fires. In additio… The egg-infested twigs can easily be seen once the leaves have fallen. Common viburnums that are considered susceptible include: V. acerifolium (mapleleaf viburnum), V. lantana (wayfaringtree viburnum), V. rufidulum (rusty blackhaw, southern black-haw), and V. sargentii (Sargent viburnum). use escape to move to top level menu parent. If insecticides are used, it is best to treat young larvae as they are the easiest to kill. Most species in all susceptibility groups exhibit more feeding damage when grown in the shade. Egg-laying sites may be seen on twigs from fall until spring. Once the twigs have been removed, destroy them by burning (where permitted), chipping , composting or burying. Symptoms and Effects : VLB larvae chew holes in viburnum leaves in the spring creating a lace-like (i.e., skeletonized) pattern. Adult females lay up to 500 eggs on viburnum twigs in summer and early fall. Viburnum leaf beetle feeds only on viburnums. They will skeletonize the leaves, eating the tissue between the veins. Susceptible species do not have to be abandoned, but it may be wise to plant them in moderation. They are brown and about ¼ inch in length, with the females being slightly larger than the males. Viburnum leaf beetle (VLB) feed only on Viburnum species. The Viburnum leaf beetle (Pyrrhalta viburni) is native to Europe. Natural Areas Conservation Training Program, Black walnut toxicity (plants tolerant of), Preventing construction damage to trees and shrubs, Trees and shrubs for the four seasons landscape, Sudden Oak Death, Ramorum Blight and Phytophthora ramorum, Eastern United States Wetlands Collection, http://www.hort.cornell.edu/vlb/suscept.html. VLB(Pyrrhalta viburni),is a recent unintentionally introduced pest of viburnum in North America. One of the easiest ways to reduce the population of beetles is to remove and destroy the twigs that bear the eggs. As the larvae grow, they will molt and shed their skin, so cast off skins may be noted on the leaves of the host plant. Viburnum species vary in their susceptibility to feeding by V… This pest has been on the move ever since munching its way through native and landscape viburnums from upstate New York to northern Pennsylvania. Pictures and more information about eggs. A leaf beetle, Pyrrhalta viburni (Paykull), commonly known as the viburnum leaf beetle (VLB) particularly attacks viburnums (Weston and Hoebeke 2003a). A sticky barrier like Tanglefoot® applied to stems may keep some larvae from crawling to the ground to pupate. Have tree and plant questions? Use left and right arrow keys to navigate between menus and submenus. Consider planting the more resistant species of viburnums. There are four species of Viburnum native to Minnesota (V. edule - squashberry, V. lentago - nannyberry, V. rafinesquianum – downy arrow-wood, V. trilobum – American high-bush cranberry), and one considered naturalized (V. opulus – European high-bush cranberry). Pictures and more information about pupae, Pictures and more information about adults. It's possible that the your viburnum is not included in this guide. Excessive use of any species always has the potential to magnify pest problems. Symptoms and Effects : VLB larvae chew holes in viburnum leaves in the spring Common viburnums that are considered resistant include:  V. carlesii (Koreanspice viburnum), V. x juddii (Judd viburnum), V. plicatum (doublefile viburnum), V. plicatum var. In 2015, the beetle was reported across the Chicago region with some regularity. Highly susceptible species are the first to be attacked, and are generally destroyed in the first 2-3 years following infestation. Several eggs are laid in each cavity. Pictures and more information about larvae. There are some beneficial insects that will attack the viburnum leaf beetle. Contact the Plant Clinic (630-719-2424 or plantclinic@mortonarb.org) for current recommendations. Adult: The viburnum leaf beetle is approximately 4.5 to 6.5 mm (~ 1/5 to 1/4 inch) in length. Pictures and more information about larva damage. The larvae vary in color from pale green to pale yellow. This insect overwinters as eggs in the tips of twigs of the host plant. Larvae feed on foliage until early summer, then crawl down the shrub and pupate in the soil. Use left and right arrow keys to navigate between menus and submenus. tomentosum (doublefile viburnum), V. rhytidophyllum (leatherleaf viburnum), V. sieboldii  (Siebold viburnum). VLB is native to Europe and was detected in Canada in 1947. The information given here is for educational purposes only. It is a relatively new pest to the Chicago region. In the United States, they have been reported in parts of New York State, Maine, Pennsylvania, Vermont, and parts of Ohio. Appearance: Adult VLB’s are approximately ¼ ong andinch lyellowish -brown in color. VLB larvae can be up to ⅓ inch long and range in color from yellowish-green to light brown with a series of black spots and dashes on their bodies. Our native Viburnum species are extremely vulnerable; they aren't adapted to this species of leaf beetle. The first confirmed occurrence of the beetle in Illinois was documented in 2009 in Cook County. Viburnum Leaf Beetle – Our Newest Exotic Insect . americana, formerly V. trilobum  (American cranberry-bush viburnum). It's not all doom and gloom if you possess Viburnum in your garden because Viburnum Beetles have a range of natural enemies to help keep them at bay. Close inspection reveals that the insect is covered with fine golden hairs. Encourage beneficials to come to your yard by planting a diverse group of flowers and by limiting the use of broad spectrum insecticides that may kill them. New larvae will start to hatch out around mid-May in most years and will move to the new leaves to feed. Use pesticides safely and wisely; read and follow label directions. There are more than 150 species worldwide. Pyrrhalta viburni (Paykull), commonly known as the viburnum leaf beetle, is a landscape pest of Eurasian origin that is quickly spreading through the northeastern United States. It has now moved to the northeastern United States where it is a concern in urban landscapes and nurseries. VLB larvae can be up to ⅓ inch long and range in color from yellowish-green to light brown with a series of black spots and dashes on their bodies. The larvae, concealed on the undersides of leaves, skeletonize them by eating the tender tissue between the tougher leaf veins, while the adults simply bite … The caps are dark and stand out against the bark of the twig, making them easy to see. Viburnum dentatum, southern arrowwood or arrowwood viburnum or roughish arrowwood, is a small shrub, native to the Eastern United States and Canada from Maine south to Northern Florida and Eastern Texas.. Like most Viburnum, it has opposite, simple leaves and fruit in berry-like drupes.Foliage turns yellow to red in late fall. From early to mid-June, the larvae will crawl down the stems to pupate in the soil. Viburnum Leaf Beetles are destructive pests because both the adults and larvae will devour the foliage of plants, stripping leaves completely. It … (a) Clusters of viburnum leaf beetle (VLB) egg masses along a Viburnum opulus twig. Viburnum leaf beetles adults (left) and larvae (right). From top level menus, use escape to exit the menu. Stop by, email, or call. If larvae can be killed early in the season, the amount of feeding damage can be lessened. The viburnum leaf beetle, first found in North America in 1947 in the Niagara Peninsula of Ontario, Canada, was discovered in New York State in northern Cayuga County (Fair Haven Beach State Park) in July 1996. Since both the larvae and the adults can feed, damage occurs over the majority of the growing season and it can be quite extensive on highly susceptible species. The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Adult beetles are fairly non-descript and are easily over-looked. Pyrrhalta viburni (Paykull), commonly known as the viburnum leaf beetle, is a landscape pest of Eurasian origin that is quickly spreading through the northeastern United States. It is a relatively new pest to the Chicago region. From egg hatch to adult takes just 8 to 10 weeks. Here, we show that in the native range of the viburnum leaf beetle (VLB, Pyrrhalta viburni), two populations of geographically isolated hosts—Viburnum opulus and Viburnum tinus—have divergent defences against VLB oviposition: negative versus positive density-dependent egg-crushing wound responses, respectively. Insecticides can be applied to adults, but by that time there may be a lot of damage already done. Low- to moderate-severity fires top-kill maple-leaf viburnum. Our communities. Both larvae and adults eat leaves. Adults emerge from the soil in midsummer, feed again on viburnum foliage, and mate. The dorsal surface is covered with dense golden-grey hair (Weston and Hoebeke 2003a). If you have viburnum shrubs on your property and live along the northshore, be on the lookout this spring for leaves being skeletonized, creating a … Breeding populations actually became established in North America (near Ottawa, Ontario, Canada) in the late 1970s, but did not reach the U.S. until 1994, when it was discovered in Maine. Our future. Larvae are yellow or green and twice as long as the adults. After that time, the adult beetles will emerge and they will also feed on the leaves, continuing to skeletonize them. You can search, browse, and learn more about the plants in our living collections by visiting our BRAHMS website. Use up and down arrow keys to explore within a submenu. Resistant species show little or no feeding damage, and survive infestations rather well. The eggs overwinter and hatch in spring. The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Egg-laying will occur from late summer into autumn, with each female able to lay as many as 500 eggs. Generally, the elm leaf beetle is slightly larger with a body length of 5.8 to 6.8 mm (~1/4 inch). VLB larvae can be up to ⅓ inch long and range in color from yellowish-green to light brown with a series of black spots and dashes on their bodies. Use enter to activate. The actual eggs are not visible. They are native to and found throughout most of Europe. VIBURNUM LEAF BEETLE - Larvae were found in June on viburnum shrubs near Oshkosh in Winnebago County. Only spray infested viburnum plants and try to avoid drift onto other plants to preserve pollinators and other beneficial insects in the yard and garden. The pesticide information presented in this publication is current with federal and state regulations. Use up and down arrow keys to explore within a submenu. Heavy feeding for 2 to 3 years can lead to the death of a viburnum. The first report of VLB in the United States was in New York State in 1996. It was first found in upstate New York in 1996. Viburnum leaf beetles Asked June 2, 2020, 1:11 PM EDT Hello, I've lost at least 5 large viburnum bushes, including my beloved Snowball bush that I started from a cutting 14 years ago from my grandma's bush. The larvae will go through three instars, growing as they molt. Common viburnums that are considered highly susceptible include:  Viburnum dentatum (arrowwood viburnum), V. nudum, (possum-haw, smooth witherod viburnum), V. opulus (European cranberry-bush viburnum), and V. opulus var. In 2015, the beetle was reported across the Chicago region with some regularity. The viburnum leaf beetle overwinters as eggs and requires a chilling period of approximately five months (Weston and Diaz 2005). Both adults and larvae feed only on leaves of viburnum species. The eggs are laid in small holes on the twigs and then the holes are capped with a mixture or chewed wood and excrement. comprised a pair of Viburnum twigs of the tested host-plant kept in floral water tubes, and a pair of leaves as a food source. Written by: John Gall, Certified Arborist/Municipal Specialist WI-0249AM. The young (larvae) are tiny upon hatching and will only reach about 1/3 of an inch in length at maturity. Moderately susceptible species show varying degrees of susceptibility, but usually are not destroyed by the beetle. Common viburnums that are considered moderately susceptible include: V. burkwoodii (Burkwood viburnum), V. x carlcephalum (Carlcephalum viburnum), V. cassinoides  (witherod viburnum), V. dilatatum  (linden viburnum), V. farreri  (fragrant viburnum) (except 'Nanum', which is highly susceptible), V. lentago (nannyberry viburnum), V. prunifolium  (blackhaw viburnum), V. x rhytidophylloides (lantanaphyllum viburnum). The body is marked with black dots along the sides and a row of black dashes along the back. It was recently discovered in a landscape in western Maryland. The native range of the viburnum leaf beetle includes most of Europe. Viburnum leaf beetle: The viburnum leaf beetle (Pyrrhalta viburni), native to Europe and Asia, was In Canada, they are currently found in many areas of Ontario and the Canadian Maritime Provinces. In May, larvae hatch from the overwintered eggs and begin feeding on host plants. A preliminary list of susceptible and resistant cultivars has been developed by Dr. Paul Weston of Cornell University (see http://www.hort.cornell.edu/vlb/suscept.html for a full list.). Each pair of twigs was homogeneous in length (12 cm) and diameter to the nearest half millimetre (from (a) (b) Figure 1. Larvae skeletonize the foliage, beginning on low branches. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. They're recently been discovered in British Columbia. They hatch around May when leaf buds open. Adult viburnum leaf beetles, Pyrrhalta viburni (Paykull), on arrowwood viburnum berries. The first report of VLB in the United States was in New York State in 1996. Be on the lookout for this serious pest of native and landscape viburnums. Viburnum leaf beetle has only one generation per year. The viburnum leaf beetle (Pyrrhalta viburni) is an invasive pest from Europe that is currently established in the eastern United States, British Columbia, and parts of Washington. The viburnum leaf beetle (Pyrrhalta viburni) was introduced from Europe and Asia to North America around 1947 and first became a problem in Canada in 1978. Within a submenu, use escape to move to top level menu parent. Winnebago was the third Wisconsin county in which viburnum leaf beetle has been detected since 2009, following Milwaukee and Ozaukee. An adult viburnum leaf beetle is between 4.5 and 6.5 mm long. The body is gold-gray, but the head, wing cover and shoulders are brown. Females chew small depressions in twigs of viburnum shrubs, lay several eggs, and cover the eggs with pits of chewed plant materials. 2007. This guide does not include all viburnum species. Pyrrhalta viburni, the viburnum leaf beetle, or VLB for short, is native to Europe.It was first discovered in North America barely two decades ago, in Maine in 1994. A few possible sightings of this pest were reported in 2013 an 2014. Get expert help from The Morton Arboretum Plant Clinic. The head, thorax and elytra are generally brown, and the anterior edge of the elytra is slightly dark. More detailed information on viburnum leaf beetle is available at the Cornell University Viburnum Leaf Beetle website. This beetle, which is native to Europe and Asia, was first detected in North America in 1947 in Ontario, Canada, but established breeding populations were noticed only in 1978 in the Ottawa/Hull region of Canada (Becker 1979). They are often in rows. Browse the curated collection and add your voice! The amount of feeding on susceptible species can be very damaging. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement made by The Morton Arboretum. Adults will generally be present from early July until frost. The following menu has 3 levels. They complete just one lifecycle each year. This guide will help you identify the ones you are most likely to encounter in the range of the viburnum leaf beetle in the Northeast U.S. and eastern Canada. This insect feeds as both larvae and adults and can do extensive damage. 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