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Viburnum Leaf Beetle

Viburnum Leaf Beetle. Paul Weston, Cornell University, Bugwood.org. David Cappaert, Michigan State University. E. Richard Hoebeke, Cornell University, Bugwood.org. What is VLB?. Leaf beetle native to Eurasia Established in North America during 1970’s? Attacks only Viburnum spp.

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Viburnum Leaf Beetle

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  1. Viburnum Leaf Beetle Paul Weston, Cornell University, Bugwood.org David Cappaert, Michigan State University E. Richard Hoebeke, Cornell University, Bugwood.org

  2. What is VLB? • Leaf beetle native to Eurasia • Established in North America during 1970’s? • Attacks only Viburnum spp. • Species and varieties vary in susceptibility Paul Weston, Cornell University, Bugwood.org Richard Webb, Self-employed horticulurist, Bugwood.org

  3. History 1994 2009 2002 Map: National Agricultural Pest Information Service

  4. VLB Lifecycle • Late Summer / Fall • Eggs laid • Spring • Eggs hatch Capped egg pits on twig Paul Weston, Cornell University, Bugweb.org Empty egg pits on twig Paul Weston, Cornell University, Bugweb.org

  5. VLB Lifecycle • Spring • Larvae feed on leaves • Subtle damage to leaf underside at first • Larger larvae skeletonize leaves E. Richard Hoebeke, Cornell University, Bugwood.org Paul Weston, Cornell University, Bugweb.org

  6. VLB Lifecycle • Summer (June / July) • Larvae pupate in soil • Adults also feed on Viburnum leaves • Make holes that cross veins Paul Weston, Cornell University, Bugweb.org Paul Weston, Cornell University, Bugwood.org

  7. Viburnum spp. in Minnesota • Wild Viburnum spp. In Minnesota • Source: Smith, 2008. Trees and Shrubs of Minnesota.

  8. Viburnum spp. in Minnesota • CultivatedViburnumspp. In Minnesota

  9. OtherViburnumInsects • Viburnum borer • Clearwing borer • Tunnels in stem < 18” of ground David Parsons, University of Wisconsin, Bugwood.org David Parsons, University of Wisconsin, Bugwood.org

  10. OtherViburnumInsects • Four-lined plant bug • Damages tissue • Could resemble feeding from early instar larvae Steve Mayer, Extension Educator, Marion County, Indiana Steve Mayer, Extension Educator, Marion County, Indiana H. Russel, MSU Diagnostic Services

  11. OtherViburnumInsects • Japanese beetle? • How common on Viburnum? • Damage may be identical • Larvae would not be present USDA Agricultural Research Service Archive, USDA Agricultural Research Service, Bugwood.org Clemson University - USDA Cooperative Extension Slide Series, Bugwood.org

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