You can search, browse, and learn more about the plants in our living collections by visiting our BRAHMS website. The head, thorax and elytra are generally brown, and the anterior edge of the elytra is slightly dark. Viburnum leaf beetle has been known in some eastern states since the early 1990’s.  It is a relatively new pest to the Chicago region.  A few possible sightings of this pest were reported in 2013 an 2014.  In 2015, the beetle was reported across the Chicago region with some regularity.  This insect feeds as both larvae and adults and can do extensive damage.  If left unchecked it can lead to the death of the shrub. Highly susceptible species are the first to be attacked, and are generally destroyed in the first 2-3 years following infestation. 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. VLB was first discovered and identified in North America in 1947 in the Niagara Peninsula of Ontario, Canada, and has spread from there (Ventresca and Kessel 2012). Adult beetles are fairly non-descript and are easily over-looked. The larvae are quite small and darkly coloured when they first emerge. Use up and down arrow keys to explore within a submenu. (Photos courtesy of Paul Weston, Cornell University, Bugwood.org). shrubs have fallen, if the viburnum leaf beetle (Pyrrhalta viburni) was present earlier this year, the eggs laid on the shrubs newest growth will be evident. 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. However, specimens had been collected in Annapolis Royal, Nova Scotia in 1924. Both the larvae and adult beetles feed on the leaves and can completely defoliate a shrub. In Wisconsin, an isolated infestation of VLB was discovered in Dane County in 2009, but was successfully eradicated. Building the urban forest for 2050. Active populations were present in New York State, Maine, and Quebec Canada for many years prior to that. Symptoms and Effects: VLB larvae chew holes in viburnum leaves in the spring creating a lace-like (i.e., skeletonized) pattern. Greetings, BugFans, It’s quiet now, but the Viburnum leaf beetle (Pyrrhalta viburni) is slowly chewing its way across southern Wisconsin.It has followed the general invasive species template – establishing small, often undetected populations and staying below the radar for years, its spread (unwittingly) aided by human activity. americana (American cranberry bush, and V. rafinesquianum (Rafinesque viburnum). It is unknown whether the beetle will kill viburnums growing elsewhere in North America. The young (larvae) are tiny upon hatching and will only reach about 1/3 of an inch in length at maturity. There are some beneficial insects that will attack the viburnum leaf beetle. Horticultural oil, insecticidal soap, pyrethrins and spinosad can also be effective. Excessive use of any species always has the potential to magnify pest problems. It was recently discovered in a landscape in western Maryland. Read more about Viburnum. The viburnum leaf beetle can cause significant damage to viburnum shrubs and is already wreaking havoc in the greater Milwaukee area. First feeding injury appears as small pin pricks or holes. Authors: PJ Liesch, UW Insect Diagnostic Lab They are brown and about ¼ inch in length, with the females being slightly larger than the males. VLB(Pyrrhalta viburni),is a recent unintentionally introduced pest of viburnum in North America. Moderately susceptible species show varying degrees of susceptibility, but usually are not destroyed by the beetle. Be on the lookout for this serious pest of native and landscap… The first report of VLB in the United States was in New York State in 1996. Generally, the elm leaf beetle is slightly larger with a body length of 5.8 to 6.8 mm (~1/4 inch). They feed on leaves, creating large oval holes that can cause defoliation. Both the adult beetle and their larvae feed on many types of viburnums. Within a submenu, use escape to move to top level menu parent. Further, the initial 2016 treatment for invasive vegetative species was performed on June 8 and 9, 2016,3 and a second and final treatment of the northern arrowwood and nannyberry viburnum shrubs to control the potential presence of viburnum leaf beetle … 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). Viburnum beetle was named as the number one pest by the RHS in 2010, stealing the crown from slugs and snails. Prune and destroy these twigs to reduce VLB numbers. It was first detected in North America in 1947 in Ontario, Canada. The viburnum leaf beetle (VLB), Pyrrhalta viburni (Paykull), which is native to most of Europe, consumes the foliage of plants in the Genus Viburnumto support its growth and development. Viburnum leaf beetle, native to Europe, was first reported in Michigan in 2008. X-number: XHT1260. Prune away egg-infested branches during the winter. While the leaves of viburnum (Viburnum spp.) Both the larvae and adult feed voraciously on the foliage; heavy infestations can defoliate shrubs, cause dieback, and eventually kill … Susceptibility to infestation Which species of viburnum are most susceptible or relatively resistant to viburnum leaf beetles. The larvae will go through three instars, growing as they molt. Larvae hatch from overwintering eggs in May. Browse the curated collection and add your voice! Susceptible species are eventually destroyed, but usually are not heavily fed upon until the most susceptible species are eliminated. Contact the Plant Clinic (630-719-2424 or plantclinic@mortonarb.org) for current recommendations. It was first detected in North America in 1947 in Ontario, Canada. In 2012 and 2013, the number of reports … Today, the pest is found in many eastern states. This non-native invasive species feeds as both a larvae and adult, skeletonizing the viburnum leaves. 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. Prune away egg-infested branches during the winter. VLB adults can be managed with contact insecticides, if needed, but are mobile and more challenging to control. In 1994, VLB was detected in the United States in Maine and Cayuga County of the state of New York in 1996 (Weston 2005). Explore this online platform for Chicago-area residents to share their favorite stories about trees. Both the adult beetle and their larvae feed on many types of viburnums. First feeding injury appears as small pin pricks or holes. Motion: JFO moved to close and issue OOC Viburnum leaf beetles are small insects that feed on viburnum leaves. Printer Friendly Version. Viburnums have been common in both public and private landscape plantings and in the wild, but … Viburnum leaf beetle was first discovered in the United States in Maine in 1994, and as of 2007 was considered to be established west to Ohio as well as in British Columbia and Washington State. The beetle’s wide distribution, particularly in western North America, increases the likelihood of this pest expanding its range in the Pacific Northwest. The viburnum leaf beetle can cause significant damage to viburnum shrubs and is already wreaking havoc in the greater Milwaukee area. Insecticides can be applied to adults, but by that time there may be a lot of damage already done. Adult: The viburnum leaf beetle is approximately 4.5 to 6.5 mm (~ 1/5 to 1/4 inch) in length. Be on the lookout for this serious pest of native and landscape viburnums. Viburnum species such as arrowwood (V. dentatum), European and American cranberrybush viburnum (V. opulus, formerly V. trilobum), wayfaringtree viburnum (V. lantana), and Sargent viburnum (V. sargentii) are in the highly susceptible and susceptible categories and can easily be destroyed by repeated infestations of the viburnum leaf beetle. This species is native to Europe, but it has been detected in Canada and … Both the immature and adult stages are serious defoliators of many viburnums. Viburnum Leaf Beetles – Plant resistant viburnum varieties to avoid viburnum leaf beetles. Species that are known to be the most susceptible to Viburnum leaf beetle damage include: the V. dentatum complex (arrowwood viburnums), V. opulus (European cranberry bush), V. opulus var. The species of viburnum most susceptible to infestation include: European cranberry; Arrowwood; Rafinesque; Wayfaring tree; Nannyberry; Blackthorn; Chinese; Possumhaw, smooth witherod; Mapleleaf; Sargent; Wright . The viburnum leaf beetle is native to Europe and has become a serious pest of viburnum plantings and nursery stock in the Northeast United States. By June the skeletonizing has become quite apparent. The adult yellowish-brown beetles are ¼ long. Control any surviving larvae with contact insecticides such as acephate, bifenthrin, carbaryl, cyfluthrin, deltamethrin, lambda-cyhalothrin, and permethrin. In 2009, VLB was discovered in Wisconsin (Dane County) and Illinois (Cook County). Viburnum beetle was named as the number one pest by the RHS in 2010, stealing the crown from slugs and snails. It was first found in upstate New York in 1996. A resident of Eden Prairie first noticed an insect feeding on arrowwood viburnum leaves and reported the find in June … The viburnum leaf beetles have a preference for viburnums with little hair (pubescence) on the foliage, including the European cranberrybush viburnum, arrowwood viburnum, and American cranberrybush viburnum. The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Use up and down arrow keys to explore within a submenu. Our communities. 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. Active populations were present in New York State, Maine, and Quebec Canada for many years prior to that. During the growing season encourage natural VLB predators in your area (e.g., lady beetles, spined soldier bugs, assassin bugs, green lacewings) that can reduce VLB numbers. Control of the Viburnum Leaf Beetle. A new insect pest to be watchful for on your property is viburnum leaf beetle. Appearance: Adult VLB’s are approximately ¼ inch long and yellowish-brown in color. Viburnum leaf beetle is native to Eurasia but appears to have become established in North America (Ottawa and Quebec) during the 1970's. 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.  Use pesticides safely and wisely; read and follow label directions. Both the immature and adult … In 1994, VLB was detected in the United States in Maine and Cayuga … For more information on viburnum leaf beetle: Contact your county Extension Educator. Damage usually starts on lower leaves with only the midribs and major veins left intact. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. One of the easiest ways to reduce the population of beetles is to remove and destroy the twigs that bear the eggs. Larvae typically appear in early to mid-May and feed for several weeks, passing through three stages (instars) as they grow. Introduce lacewings as beneficial insects. This insect overwinters as eggs in the tips of twigs of the host plant. Each female can deposit up to 500 eggs. Common viburnums that are considered resistant include:  V. carlesii (Koreanspice viburnum), V. x juddii (Judd viburnum), V. plicatum (doublefile viburnum), V. plicatum var. Several species of viburnums native to these regions have been heavily impacted by the beetle. The head, thorax and elytra are generally brown, and the anterior edge of the elytra is slightly dark. due to viburnum leaf beetle present in the area. Viburnum leaf beetle has only one generation per year. Feedback, questions or accessibility issues: © 2020 The Board of Regents of the University of Wisconsin System. Severe VLB infestations can cause complete defoliation of a viburnum shrub, which weakens the plant over time and can eventually lead to death. The Viburnum Leaf Beetle citizen science project involved both plants (viburnums) and an insect (the viburnum leaf beetle). Use enter to activate. VLB is now found scattered across much of the northeastern US. Stop by, email, or call. It was first found in Illinois (Cook County) in 2009. This article was last updated on 07/27/20. 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