This pest has been on the move ever since munching its way through native and landscape viburnums from upstate New York to northern Pennsylvania. Viburnum Leaf Beetle – Our Newest Exotic Insect . Common Name: viburnum leaf beetle Family Name: Chrysomelidae - Leaf beetle family Species Code: PYVI1 Native range: Asia and Europe NJ Status: Widespread. americana, formerly V. trilobum  (American cranberry-bush viburnum). Be on the lookout for this serious pest of native and landscape viburnums. Low- to moderate-severity fires top-kill maple-leaf viburnum. 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 … 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. Use up and down arrow keys to explore within a submenu. 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. Feeding damage may be noted before the actual insect is seen. Egg-laying sites may be seen on twigs from fall until spring. The eggs overwinter and hatch in spring. The amount of feeding on susceptible species can be very damaging. Winnebago was the third Wisconsin county in which viburnum leaf beetle has been detected since 2009, following Milwaukee and Ozaukee. More detailed information on viburnum leaf beetle is available at the Cornell University Viburnum Leaf Beetle website. In the United States, they have been reported in parts of New York State, Maine, Pennsylvania, Vermont, and parts of Ohio. The following menu has 3 levels. 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. From early to mid-June, the larvae will crawl down the stems to pupate in the soil. Get expert help from The Morton Arboretum Plant Clinic. Viburnum leaf beetle (VLB) feed only on Viburnum species. They are often in rows. The pesticide information presented in this publication is current with federal and state regulations. Our trees. The body is gold-gray, but the head, wing cover and shoulders are brown. They complete just one lifecycle each year. 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. Close inspection reveals that the insect is covered with fine golden hairs. There are more than 150 species worldwide. They are brown and about ¼ inch in length, with the females being slightly larger than the males. The body is marked with black dots along the sides and a row of black dashes along the back. 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. The actual eggs are not visible. They are native to and found throughout most of Europe. You can search, browse, and learn more about the plants in our living collections by visiting our BRAHMS website. The user is responsible for determining that the intended use is consistent with the label of the product being used. Susceptible species do not have to be abandoned, but it may be wise to plant them in moderation. Use pesticides safely and wisely; read and follow label directions. 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. VIBURNUM LEAF BEETLE - Larvae were found in June on viburnum shrubs near Oshkosh in Winnebago County. Most species in all susceptibility groups exhibit more feeding damage when grown in the shade. Generally, the elm leaf beetle is slightly larger with a body length of 5.8 to 6.8 mm (~1/4 inch). The first report of VLB in the United States was in New York State in 1996. 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. Viburnum acerfolium leaves can be damaged or skeletonized by the beetle adults and Have tree and plant questions? Our native Viburnum species are extremely vulnerable; they aren't adapted to this species of leaf beetle. Adults will generally be present from early July until frost. Pupation takes about ten days. 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.). 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. Adult viburnum leaf beetles, Pyrrhalta viburni (Paykull), on arrowwood viburnum berries. It is a relatively new pest to the Chicago region. Viburnum leaf beetle: The viburnum leaf beetle (Pyrrhalta viburni), native to Europe and Asia, was 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. Our future. Larvae skeletonize the foliage, beginning on low branches. Use enter to activate. Both larvae and adults eat leaves. 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). Written by: John Gall, Certified Arborist/Municipal Specialist WI-0249AM. It was recently discovered in a landscape in western Maryland. It is a relatively new pest to the Chicago region. Posted: 2016 | Spring. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. Some species of viburnum are more susceptible to the beetle than others. 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 information given here is for educational purposes only. There are some beneficial insects that will attack the viburnum leaf beetle. Use up and down arrow keys to explore within a submenu. The young (larvae) are tiny upon hatching and will only reach about 1/3 of an inch in length at maturity. The viburnum leaf beetle overwinters as eggs and requires a chilling period of approximately five months (Weston and Diaz 2005). Females chew small depressions in twigs of viburnum shrubs, lay several eggs, and cover the eggs with pits of chewed plant materials. A leaf beetle, Pyrrhalta viburni (Paykull), commonly known as the viburnum leaf beetle (VLB) particularly attacks viburnums (Weston and Hoebeke 2003a). Pictures and more information about larvae. The egg-infested twigs can easily be seen once the leaves have fallen. 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. Larvae are yellow or green and twice as long as the adults. Explore this online platform for Chicago-area residents to share their favorite stories about trees. An adult viburnum leaf beetle is between 4.5 and 6.5 mm long. They will skeletonize the leaves, eating the tissue between the veins. Many more species of Viburnum are part of the horticultural trade and are present in landscape plantings throughout Minnesota. 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. After that time, the adult beetles will emerge and they will also feed on the leaves, continuing to skeletonize them. Viburnum leaf showing the larvae and feeding damage, Close up of the larva of the viburnum leaf beetle. VLB(Pyrrhalta viburni),is a recent unintentionally introduced pest of viburnum in North America. In 2015, the beetle was reported across the Chicago region with some regularity. Egg-laying will occur from late summer into autumn, with each female able to lay as many as 500 eggs. tomentosum (doublefile viburnum), V. rhytidophyllum (leatherleaf viburnum), V. sieboldii  (Siebold viburnum). It's possible that the your viburnum is not included in this guide. Viburnum leaf beetles adults (left) and larvae (right). The eggs are laid in small holes on the twigs and then the holes are capped with a mixture or chewed wood and excrement. use escape to move to top level menu parent. The beetle’s wide distribution, particularly in western North America, increases the likelihood of this pest expanding its range in the Pacific Northwest. Larvae feed on foliage until early summer, then crawl down the shrub and pupate in the soil. 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 … Both adults and larvae feed only on leaves of viburnum species. The larvae will go through three instars, growing as they molt. The head, thorax and elytra are generally brown, and the anterior edge of the elytra is slightly dark. Susceptible species are eventually destroyed, but usually are not heavily fed upon until the most susceptible species are eliminated. Each pair of twigs was homogeneous in length (12 cm) and diameter to the nearest half millimetre (from (a) (b) Figure 1. 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. The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Insecticides can be applied to adults, but by that time there may be a lot of damage already done. The dorsal surface is covered with dense golden-grey hair (Weston and Hoebeke 2003a). From egg hatch to adult takes just 8 to 10 weeks. Within a submenu, use escape to move to top level menu parent. 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. It has now moved to the northeastern United States where it is a concern in urban landscapes and nurseries. They're recently been discovered in British Columbia. Browse the curated collection and add your voice! Native plantings of arrowwood (Viburnum dentatum complex) in the park were found to be heavily damaged by larval … In overall appearance, VLB resembles the elm leaf beetle (Pyrrhalta luteola Müller) except for minor differences in size and color. The female beetles will lay their eggs in the cavities they chew into the stems. The caps are dark and stand out against the bark of the twig, making them easy to see. 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). The Morton Arboretum is a 501(c)(3) nonprofit that relies on the generosity of members and donors. Symptoms and Effects : VLB larvae chew holes in viburnum leaves in the spring creating a lace-like (i.e., skeletonized) pattern. Contact the Plant Clinic (630-719-2424 or plantclinic@mortonarb.org) for current recommendations. The first report of VLB in the United States was in New York State in 1996. 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). This insect overwinters as eggs in the tips of twigs of the host plant. It targets a narrow range of host plants – in this case, as its common and scientific names imply, shrubs in the genus Viburnum. 2007. Excessive use of any species always has the potential to magnify pest problems. Larvae pass through three developmental stages (instars), Figure 2. Use left and right arrow keys to navigate between menus and submenus. 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. In May, larvae hatch from the overwintered eggs and begin feeding on host plants. Moderately susceptible species show varying degrees of susceptibility, but usually are not destroyed by the beetle. 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. Viburnum species vary in their susceptibility to feeding by V… A sticky barrier like Tanglefoot® applied to stems may keep some larvae from crawling to the ground to pupate. The Viburnum leaf beetle (Pyrrhalta viburni) is native to Europe. 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. Symptoms and Effects : VLB larvae chew holes in viburnum leaves in the spring Viburnum leaf beetle has only one generation per year. This insect feeds as both larvae and adults and can do extensive damage. A few possible sightings of this pest were reported in 2013 an 2014. Use left and right arrow keys to navigate between menus and submenus. They hatch around May when leaf buds open. Once the twigs have been removed, destroy them by burning (where permitted), chipping , composting or burying. They can be removed from October through April. Appearance: Adult VLB’s are approximately ¼ ong andinch lyellowish -brown in color. 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). A few possible sightings of this pest were reported in 2013 an 2014. Highly susceptible species are the first to be attacked, and are generally destroyed in the first 2-3 years following infestation. Consider planting the more resistant species of viburnums. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. Adult females lay up to 500 eggs on viburnum twigs in summer and early fall. The larvae vary in color from pale green to pale yellow. 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. Hoebeke. From top level menus, use escape to exit the menu. Resistant species show little or no feeding damage, and survive infestations rather well. Stop by, email, or call. Pictures and more information about pupae, Pictures and more information about adults. Pictures and more information about larva damage. 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 is native to Europe and was detected in Canada in 1947. Viburnum leaf beetle feeds only on viburnums. The native range of the viburnum leaf beetle includes most of Europe. Several eggs are laid in each cavity. 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. One of the easiest ways to reduce the population of beetles is to remove and destroy the twigs that bear the eggs. 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. 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. The first confirmed occurrence of the beetle in Illinois was documented in 2009 in Cook County. In Canada, they are currently found in many areas of Ontario and the Canadian Maritime Provinces. Heavy feeding for 2 to 3 years can lead to the death of a viburnum. Viburnum Leaf Beetles are destructive pests because both the adults and larvae will devour the foliage of plants, stripping leaves completely. 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. New larvae will start to hatch out around mid-May in most years and will move to the new leaves to feed. If larvae can be killed early in the season, the amount of feeding damage can be lessened. Building the urban forest for 2050. Pictures and more information about eggs. Our communities. In 2015, the beetle was reported across the Chicago region with some regularity. In the United States it hasbeen found in only a few states, including New York, Ohio, Pennsylvania, Maine, Vermont and Massachusetts. 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. Adults emerge from the soil in midsummer, feed again on viburnum foliage, and mate. If insecticides are used, it is best to treat young larvae as they are the easiest to kill. It was first found in upstate New York in 1996. It … If left unchecked it can lead to the death of the shrub. Common viburnums that are considered resistant include:  V. carlesii (Koreanspice viburnum), V. x juddii (Judd viburnum), V. plicatum (doublefile viburnum), V. plicatum var. Adult: The viburnum leaf beetle is approximately 4.5 to 6.5 mm (~ 1/5 to 1/4 inch) in length. 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. Selected reference: Weston, P.A., G. Desurmont, and E.R. (a) Clusters of viburnum leaf beetle (VLB) egg masses along a Viburnum opulus twig. In additio… Adult beetles are fairly non-descript and are easily over-looked. This guide does not include all viburnum species. And follow label directions serious pest of native and landscape viburnums from upstate new York State in 1996 yellow. Early to mid-June, the elm leaf beetle is available at the Cornell viburnum. Is consistent with the label of the horticultural trade and are generally destroyed in the States... 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