Viburnum leaf beetle pest alert wisconsin horticulture. Native plantings of arrowwood viburnum dentatum complex in the park were found to be heavily damaged by larval feeding. The impact of viburnum leaf beetle on native arrowwood. The viburnum leaf beetle the viburnum leaf beetle vlb, pyrrhalta viburni paykull, is an invasive species that was introduced into north america from europe. Larvae hatch in spring and begin to feed on the new viburnum leaves. Viburnum leaf beetle, pyrrhalta viburni, coleoptera. Chrysomelidae the viburnum leaf beetle was officially identified in massachusetts in the summer of 2004. Photo courtesy of kent loefflercornell university the insect feeds and creates holes on the leaves of viburnums in both its adult beetle and larval stages, which doubles the damage it can do to these popular shrubs.
The viburnum leaf beetle pyrrhalta viburni is an exotic leaf beetle native to europe. Wasps factsheet on stinging insects from cornell cooperative extension. Up until the last 2 weeks, weve only had a couple of isolated reports of viburnum leaf beetle in the state, in both dupage and cook counties. The beetle feeds exclusively on many different types of viburnum. Q what is viburnum beetle a an inconspicuous beetle that nibbles holes in viburnums when its both a grub and an adult caption. A variety of leaf spots are caused by the fungi cercospora spp. Click this article for information on viburnum leaf beetle control.
These fungal leaf spots on viburnum typically are angular to irregularshaped, and the leaf tissue in the spots is sunken and dry. It can cause branch dieback and even death of viburnum species, including native species and popular ornamentals. It was first detected in north america in 1947 in ontario, canada. Distribution the native range of the viburnum leaf beetle includes most of europe.
Adult viburnum leaf beetles are a shiny gold color, especially in the sun. Viburnum leaf beetle, pyrrhalta viburni paykull, is a chrysomelid beetle, aptly named, as it feeds on leaves of viburnum. Chrysomelidae 4 management mechanical control the best management option for vlb is to prune and destroy the infested twigs and branches during the winter. Viburnum leaf beetle, pyrrhalta viburni paykull 2 1st instar larvae feeding gregariously on bottom side of viburnum leaf. Viburnum leaf beetle susceptibility to infestation which species of viburnum are most susceptible or relatively resistant to viburnum leaf beetles. Paul weston, cornell university, 2nd left and 3rd right instar larvae may feed on both sides of leaves. Active populations were present in new york state, maine, and quebec canada for many years prior to that. Viburnum leaf beetle management and prevention options. Both adults and larvae feed on the foliage of the host plant. The damage potential from the beetle is quite extensive, if not managed. Viburnum leaf beetles overwinter as eggs on the previous years new stems. The first report of vlb in the united states was in new york state in 1996. The impact of viburnum leaf beetle on native arrowwood paul a.
Viburnumvlb is native to and europewas detected in canada in 1947. Viburnum leaf beetle pyrrhalta viburni is an invasive pest from europe that is spreading in washington state. Both the larvae and adult beetles feed on viburnum leaves and can cause death to shrubs both in natural. It was first detected in 1947 in the niagara peninsula of ontario, canada, and then in. Viburnum leaf beetle the viburnum leaf beetle, pyrrhalta viburni vlb, was first found in north america in 1947 in ontario, canada. Just because a species is listed as most resistant doesnt mean that it won. It is best to start monitoring for eggs after the first frost in the fall or winter. There is a new ohio state university extension factsheet that you must check out. The viburnum leaf beetle vlb, pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage viburnum species. Pyrrhalta viburni is a species of leaf beetle native to europe and asia, commonly known as the viburnum leaf beetle.
If you live in an area at risk for viburnum leaf beetles, savatree can inspect, prune and destroy twigs with egg masses before the eggs have a chance to hatch. However, specimens had been collected in annapolis royal, nova scotia in 1924. 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. It was first reported in ontario in 1947 but did not create problems until 1978 when destruction of european varieties of viburnums was observed. Viburnum leaf beetle friends of the wild flower garden. Spots may begin small, but enlarge or merge, and may be reddish to grayish brown. Viburnum beetle overwinters as eggs that are deposited in the bark of stems in late summer. To safeguard your susceptible shrubs, your best bet is to take preventative viburnum leaf beetle management measures. These eggs hatch in late aprilearly may and the larvae begin feeding on the new foliage. The viburnum leaf beetle only feeds on viburnum species. Viburnum leaf beetle has been known in some eastern states since the early 1990s. Pdf on apr 1, 2016, todd murray and others published pest watch. Click on any title in the list below, to view, print, or download a pdf file.
Larvae crawl down the stems of the bushes to pupate in the soil in june. Paul weston, woody plant entomologist, cornell university. Pests and potential problems the viburnum leaf beetle pyrrhalta viburni was introduced from europe and asia to north america around 1947. Viburnum leaf beetle university of maryland extension. Viburnum leaf beetle pyrrhalta viburni paykull insecta. This highly destructive pest was first detected in new york state near lake ontario in 1996. A leaf beetle, pyrrhalta viburni paykull, commonly known as the viburnum leaf beetle vlb particularly attacks viburnums weston and hoebeke 2003a. 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. Weve shared several articles in in the home, yard, and garden pest newsletter about the viburnum leaf beetle. However, damaging populations infesting viburnum plants were not observed. Smart nursery owners will plant a lot of the lesssusceptible viburnums.
Vlb is native to europe and was detected in canada in 1947. Both the immature and adult stages are serious defoliators of many viburnums. Paul weston, cornell university, old viburnum twig with empty egg cavities, caps missing. This publication describes how to identify viburnum leaf beetle and gives numerous resources for home gardeners and landscape professionals to use. Chrysomelidae images by timothy abbey, richard cowles and rose hiskes the viburnum leaf beetle was first found in connecticut in 2004.
The grubs hatch in spring and nibble viburnum leaves q how do i recognise viburnum beetle a most damage is done by the grubs or larvae which are yellow, about 5mm long, with fine black lines and spots. Prune off basal suckers to restrict spreading if necessary. The viburnum leaf beetle pyrrhalta viburni, native to europe and asia, was first encountered in north america in 1947, perhaps. The viburnum leaf beetle vlb pyrrhalta viburni order coleoptera. The factsheet covers the viburnum leaf beetle, an invasive species from europe and asia. The viburnum leaf beetle, first found in north america in 1947 in the niagara peninsula of ontario, canada. This pest has been on the move ever since munching its way through native and landscape viburnums from upstate new york to northern. Larvae are pale yellow to pale green with black dots and are about 14 inch long when mature. The viburnum leaf beetle vlb, pyrrhalta viburni, is an exotic invasive pest of viburnum species in the united states. Both the larvae and adult feed voraciously on the foliage. The first viburnum leaf beetle, pyrrhalta viburni coleoptera.
Smart landscape managers will start shifting their customers to the less susceptible cultivars. 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. Do plant defenses predict damage by an invasive herbivore. Chrysomelidae, found in new york state, was collected, identified, and confirmed by e. Viburnum opulus, european highbush cranberry and its selections. Idl factsheets insect diagnostic laboratory at cornell. Weston, department of entomology, cornell university, 2004.
New osu factsheet online viburnum leaf beetle vlb category. When fully fed in late mayjune, the larvae go into the soil to pupate. Species that are known to be the most susceptible to viburnum leaf beetle damage include. The specimens were collected on 7596 at fair haven state park in cayuga county on wild and ornamental arrowwood, viburnum spp. Viburnum leaf beetle find, read and cite all the research you need on researchgate. Weston1 and victoria nuzzo2 viburnum leaf beetle, known scientifically as pyrrhalta viburni, is a small, brown beetle native to eurasia that was accidentally introduced into north america in the early 1900s. 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 ottawahull. Viburnum leaf beetle home back to the plant printerfriendly. However, getting rid of viburnum leaf beetles is far from easy. 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. Vlb was first discovered and identified in north america in 1947 in the niagara peninsula of ontario, canada. Viburnum leaf beetle pyrrhalta viburni paykull in the.
1491 136 91 1381 547 869 1496 345 585 104 1552 596 1518 1413 567 480 1091 1018 1570 674 840 227 1198 1044 826 1580 274 940 806 239 434 1003 829 46 60 427 1463 292 1071 884 986 389 925 28 171 183