Written by: John Gall, Certified Arborist/Municipal Specialist WI-0249AM. Both larvae and adults feed on viburnum foliage. The viburnum beetle is a major pest of ornamental plants, but it's the larvae that cause the main problems Credit: Photo: Turnip Towers / Alamy Time was when viburnums were relatively pest-free. Like adults, the larvae feed on Viburnum leaves. It is a relatively new pest to the Chicago region. In 1996 it was discovered in New York State. If this is not practical, you might consider signing up for our Tree & Shrub Program , and a special Viburnum Leaf Beetle suppression application. Will killing the adult beetles help protect my shrub? The first report of VLB in the United States was in New York State in 1996. VLB is now found scattered across much of the northeastern US. The first report of VLB in the United States was in New York State in 1996. After mating, females implant eggs in small pits chewed into Viburnum twigs and cover the eggs with chewed wood. Many of V. bodnantense, dawn viburnum, V. carlesii, V. davidii*, David viburnum, V. x juddii, Judd viburnum and V. plicatum are just a handful of some of the more resistant strains. Adults and Adult Leaf Damage (Late June to leaf drop in fall) Q: It's now July, and I see small beetles feeding on my viburnums that were eaten by viburnum leaf beetle larva this spring. Larvae hatch in spring and begin to feed on the new viburnum leaves. Many of these landscape plants are being threatened and killed by a recent insect pest, the viburnum leaf beetle. Native to both Europe and Asia, viburnum leaf beetles were first spotted in North America in 1978, in the Ottawa-Hull region of Canada. The body is gold-gray, but the head, wing cover and shoulders are brown. They chew oblong shotholes on the leaves. Since Viburnum Leaf Beetles only destroy some Viburnum plants, one way to avoid the damage might be to replace your viburnums with another resistant plant. In 2015, the beetle was reported across the Chicago region with some regularity. Viburnum beetles are a species of leaf beetle that feast on shrubs from the viburnum family. Native plantings of arrowwood ( Viburnum dentatum complex) in the park were found to be heavily damaged by larval feeding. Herbivory by viburnum leaf beetle larvae and adults was measured yearly in spring and summer, respectively, and plant height was recorded at the end of each growing season. If you live in the area, I strongly suggest you begin monitoring your viburnums for this critter. One of the most damaging diseases of viburnum is Armillaria root rot, also known as shoestring root rot or mushroom root rot. Viburnum leaf beetles overwinter as eggs on the previous year's new stems. Viburnum leaf beetle. One of the reasons that it is hard to control these leaf beetles involves the viburnum leaf beetle lifecycle. Viburnum Leaf Beetle, Pyrrhalta viburni, is a new invasive species that is making its way down the East Coast and could wreak havoc on both native and imported species of Viburnum in DC, Maryland, and Northern VA.Both the larvae and adult beetles feed on foliage creating severe damage and eventually killing the plant. The first report of VLB in the United States was in New York State in 1996. Viburnum Leaf Beetle – Our Newest Exotic Insect . The good news is that Viburnum Leaf Beetles will only infest Viburnums. A: Yes. And, being evergreen, damaged Viburnum tinus look unsightly for several years. Imagine how many must have been present to devour the entire hedge row shown above. Pyrchalta viburni. In May, larvae hatch from the overwintered eggs and begin feeding on host plants. Roots. Damage is concentrated on young shoots. Viburnum shrubs have always been considered among the best options for pest-free landscape plants, but unfortunately, a sneaky little insect newer to North America seeks to change all that. Viburnum leaf beetle (Pyrrhalta viburni) is an invasive pest from Europe that is spreading in Washington State.It can cause branch dieback and even death of Viburnum species, including native species and popular ornamentals. A The damage is distinctive, consisting of a large number of irregular holes eaten between the veins of the leaf, which eventually takes on a lace-like appearance. Pest Alert: Viburnum Leaf Beetle The viburnum leaf beetle, Pyrrhalta viburni (Paykull), was first found in North America in 1947, in the Niagara Peninsula of Ontario, Canada. Heavy attacks, especially on Viburnum tinus, can result in most of the foliage being severely damaged. BotaniGard ES: A for Japanese beetle adults and Viburnum leaf beetle only Lynx EC 5.0: already registered for elm leaf beetle, flea beetles and Japanese beetles, A for viburnum leaf beetle only Biology and life history Viburnum leaf beetle is a European insect that is currently restricted to northwest Washington and British Columbia in Canada. Caption: Viburnum tinus is vulnerable to attack Q What damage does viburnum beetle do? The Viburnum Leaf Beetle, native to Europe, was first found in North America in 1947, in the Niagara Peninsula of Ontario, Canada. The viburnum disease treatment for these types of plants is all the same. A few possible sightings of this pest were reported in 2013 an 2014. A skeletonized viburnum leaf is a sure sign of viburnum leaf beetle. Viburnum leaf beetle, Pyrrhalta viburni (Paykull), is a landscape pest with a fairly short history in the United States. These fungal leaf spots on viburnum typically are angular to irregular-shaped, and the leaf tissue in the spots is sunken and dry. A leaf beetle called the "viburnum leaf beetle" is a pest that has the potential to become a serious problem in nurseries and landscapes in Pennsylvania. VLB is native to Europe and was detected in Canada in 1947. Encourage these and other beneficial insects by avoiding broad-spectrum insecticides and maintaining diverse species of plants for beneficial insect habitat near viburnums. The Minnesota Department of Agriculture (MDA) announced yesterday (July 25) that the viburnum leaf beetle (VLB), Pyrrhalta viburni, has been confirmed in Minnesota in Eden Prairie.VLB is an invasive insect species from Europe and is now found in scattered infestations throughout northeastern U.S. as well as Wisconsin. Larvae crawl down the … The only treatment that decreased feeding by viburnum leaf beetle was imidacloprid; these plants were virtually untouched throughout the duration of the trial. Spots may begin small, but enlarge or merge , and may be reddish to grayish brown. The adult beetles also feed on the leaves, but the damage is much less extensive than that caused by the larvae. Native to Europe, this destructive pest first appeared in the United States in Maine in 1994 and has spread fairly quickly through the northeast (see Weston and Hoebeke 2003 for a detailed invasion history). The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Viburnum leaf beetle (Pyrrhalta viburni) by Siga (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons. Some variations of Viburnum which are more resilient to leaf beetle damage, too. Viburnum Leaf Beetles are found throughout most of Europe, active from early spring. A variety of leaf spots are caused by the fungi Cercospora spp., Phoma spp., and Phyllosticta spp. Mature larvae are greenish yellow and are about 0.37 inch long. Fungal Leaf Spots. To tackle viburnum beetle successfully, you really need to understand its life cycle, so that you can target your treatment with systemic insecticide more accurately. 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 lace-like pattern of foliar damage. Posted: 2016 | Spring. The female beetle chews square holes in the twigs and deposits the eggs, then covers them with a … Viburnum leaf beetle adults are present during mid-summer and consume Viburnum leaves. Viburnum leaf beetle, Pyrrhalta viburni, a relative newcomer to Michigan landscapes, has quickly affected the health of many viburnums in southern and central areas of the Lower Peninsula.First seen in Michigan in 2003, it attacks many of our native viburnums, including arrowwood viburnum (Viburnum dentatum), American cranberrybush viburnum (Viburnum opulus var. Larvae are pale yellow to pale green with black dots and are about 1/4 inch long when mature. If you look closely you can see eighteen (18) Viburnum Beetle larvae on this single leaf. Asked July 11, 2019, 2:12 PM EDT. The larvae (April to June) can be up to 8mm long, while the adult beetles (late July to September) are greyish brown in colour and around 4.5-6mm long. The eggs overwinter and hatch into larvae in spring. Although we can kill the beetle population during infestation, helping these bushes to recover within a period of weeks only works well in the first year of infestation. VLB is native to Europe and was detected in Canada in 1947. If the leaves of your viburnums look like they’ve gone through a leaf shreader, you can be sure they’re under attack from the viburnum leaf beetle ( Pyrrhalta viburni ), This small, elongated beetle is native to Europe and Asia. Viburnum are popular ornamental shrubs with attractive spring or summer flowers, often followed by attractive berries and colorful fall foliage. Viburnum leaf beetle larvae are longer [6.1 to 9.4 mm (0.24 to 0.36 in)] than adult viburnum leaf beetles and are elongate and with a shiny, greenish-yellow body covered with black dots (Barr and Hoover 2011). PEST ALERT: Viburnum Leaf Beetle The viburnum leaf beetle, Pyrrhalta viburni (“VLB”), was first found in North America in 1947 in Ontario, Canada. In 1996 it was discovered in a park in New York, where native plantings of arrowwood (Viburnum dentatum complex) were found to be heavily damaged by larval feeding. Pest description and crop damage Adults are brown and about 0.25 inch long. Title: Managing Foliar Feeding Beetles Protocol #:16-007 Final p 3 of 6 Notations on Treatment List: AzaGuard: A for Viburnum leaf beetle only BeetleGONE! The lady beetle adults and spined soldier bug adults also eat adult viburnum leaf beetles. Females chew small depressions in twigs of viburnum shrubs, lay several eggs, and cover the eggs with pits of chewed plant materials. The viburnum leaf beetle, Pyrrhalta viburni (Paykull), is an invasive chrysomelid native to Eurasia and invasive in North America, where it was introduced in the 1920s in Canada, and is now considered a major landscape and forest pest in southern Canada and northeastern U.S. [15,16,17]. A single female may produce 500 eggs. The insect overwinters as eggs. Reducing the population of adults might improve your viburnum's chances of surviving. : already registered for Japanese beetles. There are several species and cultivars (cultivated varieties), some of which are native. The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. This would be the best time to use horticultural oil or insecticidal soap to kill the young larvae. These products have minimal impact on beneficial insects. The VLB larva and adult both feed on foliage and can cause defoliation, and several years of defoliation can kill a viburnum. The next phase of treatment would be when/if you see larvae present in the spring -- typically starting in April. Adults and larvae feed on plants belonging to the genus Viburnum , sometimes causing their death. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. Avoid overhead watering, apply fungicide if the disease is rampant and destroy damaged leaf material. Spring -- typically starting in April work ) [ GFDL or CC BY-SA 3.0 ] via! 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