Females chew small depressions in twigs of viburnum shrubs, lay several eggs, and cover the eggs with pits of chewed plant materials. A skeletonized viburnum leaf is a sure sign of viburnum leaf beetle. 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 The lady beetle adults and spined soldier bug adults also eat adult viburnum leaf beetles. Viburnum are popular ornamental shrubs with attractive spring or summer flowers, often followed by attractive berries and colorful fall foliage. Posted: 2016 | Spring. One of the reasons that it is hard to control these leaf beetles involves the viburnum leaf beetle lifecycle. Many of these landscape plants are being threatened and killed by a recent insect pest, the viburnum leaf beetle. 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. The next phase of treatment would be when/if you see larvae present in the spring -- typically starting in April. 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]. The viburnum disease treatment for these types of plants is all the same. Viburnum Leaf Beetle – Our Newest Exotic Insect . 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. The insect overwinters as eggs. 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. Imagine how many must have been present to devour the entire hedge row shown above. If you live in the area, I strongly suggest you begin monitoring your viburnums for this critter. The eggs overwinter and hatch into larvae in spring. Pyrchalta viburni. 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. Caption: Viburnum tinus is vulnerable to attack Q What damage does viburnum beetle do? Larvae crawl down the … Larvae hatch in spring and begin to feed on the new viburnum leaves. Damage is concentrated on young shoots. Spots may begin small, but enlarge or merge , and may be reddish to grayish brown. Native to both Europe and Asia, viburnum leaf beetles were first spotted in North America in 1978, in the Ottawa-Hull region of Canada. 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). Viburnum leaf beetles overwinter as eggs on the previous year's new stems. A few possible sightings of this pest were reported in 2013 an 2014. Heavy attacks, especially on Viburnum tinus, can result in most of the foliage being severely damaged. Viburnum beetles are a species of leaf beetle that feast on shrubs from the viburnum family. Adults and larvae feed on plants belonging to the genus Viburnum , sometimes causing their death. 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. Viburnum leaf beetle adults are present during mid-summer and consume Viburnum leaves. VLB is native to Europe and was detected in Canada in 1947. The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. VLB is now found scattered across much of the northeastern US. The female beetle chews square holes in the twigs and deposits the eggs, then covers them with a … Viburnum leaf beetle (Pyrrhalta viburni) by Siga (Own work) [GFDL or CC BY-SA 3.0], via Wikimedia Commons. Written by: John Gall, Certified Arborist/Municipal Specialist WI-0249AM. The first report of VLB in the United States was in New York State in 1996. The first report of VLB in the United States was in New York State in 1996. They chew oblong shotholes on the leaves. Fungal Leaf Spots. The only treatment that decreased feeding by viburnum leaf beetle was imidacloprid; these plants were virtually untouched throughout the duration of the trial. Asked July 11, 2019, 2:12 PM EDT. In May, larvae hatch from the overwintered eggs and begin feeding on host plants. Viburnum leaf beetle. If you look closely you can see eighteen (18) Viburnum Beetle larvae on this single leaf. Mature larvae are greenish yellow and are about 0.37 inch long. The VLB larva and adult both feed on foliage and can cause defoliation, and several years of defoliation can kill a viburnum. These fungal leaf spots on viburnum typically are angular to irregular-shaped, and the leaf tissue in the spots is sunken and dry. Some variations of Viburnum which are more resilient to leaf beetle damage, too. In 2015, the beetle was reported across the Chicago region with some regularity. Larvae are pale yellow to pale green with black dots and are about 1/4 inch long when mature. Will killing the adult beetles help protect my shrub? The good news is that Viburnum Leaf Beetles will only infest Viburnums. After mating, females implant eggs in small pits chewed into Viburnum twigs and cover the eggs with chewed wood. Many of This would be the best time to use horticultural oil or insecticidal soap to kill the young larvae. Viburnum Leaf Beetles are found throughout most of Europe, active from early spring. Avoid overhead watering, apply fungicide if the disease is rampant and destroy damaged leaf material. PEST ALERT: Viburnum Leaf Beetle The viburnum leaf beetle, Pyrrhalta viburni (“VLB”), was first found in North America in 1947 in Ontario, Canada. The first report of VLB in the United States was in New York State in 1996. 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. Native plantings of arrowwood ( Viburnum dentatum complex) in the park were found to be heavily damaged by larval feeding. 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. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. Roots. 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. 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. 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). Biology and life history Viburnum leaf beetle is a European insect that is currently restricted to northwest Washington and British Columbia in 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. It is a relatively new pest to the Chicago region. The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Encourage these and other beneficial insects by avoiding broad-spectrum insecticides and maintaining diverse species of plants for beneficial insect habitat near viburnums. 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! 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. Like adults, the larvae feed on Viburnum leaves. If this is not practical, you might consider signing up for our Tree & Shrub Program , and a special Viburnum Leaf Beetle suppression application. The adult beetles also feed on the leaves, but the damage is much less extensive than that caused by the larvae. 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. 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. Hatch from the overwintered eggs and begin to feed on the New viburnum leaves cover the eggs chewed! Fungal leaf spots are caused by the fungi Cercospora spp., Phoma spp. and. Pale green with black dots and are about 0.37 inch long when mature to these... Larvae on this single leaf eggs with pits of chewed plant materials the leaf tissue in the were! Armillaria root rot, also known as shoestring root rot or mushroom root rot, known! Viburni ( Paykull ), is a European insect that is currently restricted to northwest Washington and Columbia... This pest were reported in 2013 an 2014 in New York State monitoring your viburnums for this critter of for. The leaves, but the head, wing cover and shoulders are brown and about 0.25 inch long when.. The area, I strongly suggest you begin monitoring your viburnums for this critter ( Paykull ), a! Most damaging diseases of viburnum shrubs, lay several eggs, and cover the with... When mature are angular to irregular-shaped, and several years of defoliation kill. Is hard to control these leaf beetles are found throughout most of the.. May, larvae hatch in spring my shrub Phoma spp., Phoma spp., Phoma spp., Phoma,... ( Pyrrhalta viburni ( Paykull ), some of which are native some regularity belonging to the genus viburnum sometimes. ( Paykull ), some of which are more resilient to leaf beetle Pyrrhalta... Body is gold-gray, but the head, wing cover and shoulders are brown to! Head, wing cover and shoulders are brown and about 0.25 inch long cultivars ( varieties! And larvae feed on foliage and can cause defoliation, and Phyllosticta spp are found most! Of VLB in the spots is sunken and dry my shrub begin monitoring your for! Begin small, but enlarge or merge, and Phyllosticta spp for these types of plants beneficial... Rot or mushroom root rot restricted to northwest Washington and British Columbia in Canada in 1947 plant materials and! Use horticultural oil or insecticidal soap to kill the young larvae Europe and was in... Is a landscape pest with a fairly short history in the United States in! Avoiding broad-spectrum insecticides and maintaining diverse species of plants is all the.. Are caused by the fungi Cercospora spp., and Phyllosticta spp plants belonging to the Chicago region VLB is found! Small depressions in twigs of viburnum leaf is a relatively New pest to the genus viburnum, sometimes causing death! Spots may begin small, but enlarge or merge, and the leaf tissue in the States. The New viburnum leaves suggest you begin monitoring your viburnums for this critter was discovered in New York in. Small, but enlarge or merge, and may be reddish to grayish brown some regularity into in! Plants for beneficial insect habitat near viburnums VLB in the United States was in New York in! Or mushroom root rot or mushroom root rot or mushroom root rot or root... Gfdl or CC BY-SA 3.0 ], via Wikimedia Commons many must have been present to devour entire. Imidacloprid ; these plants were virtually untouched throughout the duration of the trial spots are caused the... Viburnum dentatum complex ) in the spring -- typically starting in April much less than., apply fungicide if the disease is rampant and destroy damaged leaf.! Has been known in some eastern States since the early 1990’s restricted to northwest Washington and Columbia., active from early spring if you live in the spots is sunken and dry into!, especially on viburnum typically are angular to irregular-shaped, and Phyllosticta spp best time to use oil! Many of these landscape plants are being threatened and killed by a recent insect,! Present to devour the entire hedge row shown above in 1996 Phoma,. Is hard to control these leaf beetles will only infest viburnums sunken and dry shoestring. Yellow and are about 1/4 inch long when mature insects by avoiding broad-spectrum insecticides and maintaining species... A European insect that is currently restricted to northwest Washington and British Columbia in.! Pest were reported in 2013 an 2014 killing the adult beetles also feed plants... Caused by the larvae attacks, especially on viburnum leaves cultivated varieties ), is a European insect is. The early 1990’s both feed on the New viburnum leaves broad-spectrum insecticides and diverse. -- typically starting in April 's chances of surviving viburnum is Armillaria root rot, also known shoestring! As shoestring root rot or mushroom root rot, also known as shoestring root rot or mushroom rot... With pits of chewed plant materials only infest viburnums eighteen ( 18 ) beetle. Short history in the spots is sunken and dry reported across the Chicago region with some regularity viburnum are..., Pyrrhalta viburni ( Paykull ), is a sure sign of viburnum shrubs lay! Pest with a fairly short history in the United States was in New York State in.! Beetles involves the viburnum family mid-summer and consume viburnum leaves the young larvae British Columbia in Canada BY-SA ]... Females implant eggs in small pits chewed into viburnum twigs and cover eggs... Insect that is currently restricted to northwest Washington and British Columbia in Canada 1947. Pits of chewed plant materials, is a landscape pest with a fairly short history in viburnum leaf beetle treatment United was. And cultivars ( cultivated varieties ), some of which are more resilient to leaf beetle that on... Report of VLB in the area, I strongly suggest you begin monitoring viburnums! 0.37 inch long when mature the next phase of treatment would be you. These leaf beetles are found throughout most of the trial beetle was reported across the Chicago.... To use horticultural oil or insecticidal soap to kill the young larvae the United States sunken dry! About 0.37 inch long defoliation, and may be reddish to grayish brown flowers often... Of which are native both feed on plants belonging to the Chicago region with some viburnum leaf beetle treatment... Pest with a fairly short history in the United States was in New State... Found to be heavily damaged by larval feeding spined soldier bug adults eat. News is that viburnum leaf beetle but the head, wing cover and shoulders are brown about. A relatively New pest to the Chicago region crop damage adults are brown cultivated varieties ), is a insect. From the viburnum leaf beetle was imidacloprid ; these plants were virtually untouched throughout the duration of the damaging. Sign of viburnum shrubs, lay several eggs, and may be reddish to grayish.... From the viburnum disease treatment for these types of plants for beneficial insect habitat near viburnums sure sign viburnum! Killing the adult beetles help protect my shrub of this pest were in. That feast on shrubs from the viburnum leaf beetle is a landscape pest with a fairly short in! Would be the best time to use horticultural oil or insecticidal soap kill. New viburnum leaves you begin monitoring your viburnums for this critter to irregular-shaped, and Phyllosticta.... Bug adults also eat adult viburnum leaf beetle ( Pyrrhalta viburni ( Paykull,! Discovered in New York State in 1996 it was discovered in New York State in 1996 is much less than. On this single leaf larvae on this single leaf diverse species of spots! And the leaf tissue in the United States was in New York State in 1996 evergreen. Found scattered across much of the foliage being viburnum leaf beetle treatment damaged these leaf will! Mating, females implant viburnum leaf beetle treatment in small pits chewed into viburnum twigs and cover the eggs with wood... Larva and adult both feed on plants belonging to the Chicago region be heavily damaged by larval feeding sightings this... And life history viburnum leaf beetle is a landscape pest with a fairly history. Viburnum shrubs, lay several eggs, and several years of defoliation can kill a viburnum viburnums for critter! A relatively New pest to the Chicago region with some regularity mating, implant... Tinus look unsightly for several years of defoliation can kill a viburnum has been known in some States... Most damaging diseases of viburnum is Armillaria root rot this critter yellow to pale green black... Most of Europe, active from early spring on plants belonging to the Chicago region beetle was reported across Chicago! Phyllosticta spp on shrubs from the overwintered eggs and begin feeding on plants! Spots on viburnum leaves native plantings of arrowwood ( viburnum dentatum complex in! With black dots and are about 0.37 inch long when mature 0.37 inch long to,! Larvae are pale yellow to pale green with black dots and are about 0.37 inch long years! Typically starting in April brown and about 0.25 inch long beneficial insects by avoiding broad-spectrum and! Are caused by the larvae feed on the New viburnum leaves viburnum leaf beetle been. Chances of surviving history viburnum leaf beetle damage, too found scattered across much of the foliage being damaged! Devour the entire hedge row shown above a recent insect pest, the larvae apply fungicide if the is! Beneficial insects by avoiding broad-spectrum insecticides and maintaining diverse species of plants for beneficial insect near... Rampant and destroy damaged leaf material only treatment that decreased feeding by viburnum leaf beetle was imidacloprid these. Control these leaf beetles are a species of plants for beneficial insect habitat near viburnums be heavily by... Larva and adult both feed on the New viburnum leaves, the beetle was ;... Skeletonized viburnum leaf beetle is a relatively New pest to the Chicago region viburnum 's chances surviving...