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Q&A

Plant-Insect Ecosystems

Poster

P-IE: Miscellaneous On-Demand Posters

Emerald ash borer (Agrilus planipennis, Coleoptera: Buprestidae) adult feeding preferences and larval performance on susceptible and 'lingering' ash tree selections

Poster On-Demand

    Presenting Author(s)

  • Therese M. Poland

    Research Entomologist
    USDA-Forest Service
    East Lansing, Michigan, United States

    • Co-Author(s)

  • JK

    Jennifer Koch

    USDA-Forest Service
    East Lansing, Michigan, United States

  • KK

    Kathleen Knight

    USDA-Forest Service
    Delaware, Ohio, United States

  • DC

    David Carey

    USDA-Forest Service
    Delaware, Ohio, United States

  • MM

    Mary Mason

    USDA-Forest Service
    Delaware, Ohio, United States

  • Toby R. Petrice

    Research Entomologist
    USDA-Forest Service
    East Lansing, Michigan, United States

The emerald ash borer (EAB) is the most destructive invasive forest insect pest ever to have invaded North America. It was first detected in 2002 near Detroit Michigan and has since spread to 35 states and 5 Canadian provinces where it has killed hundreds of millions of ash trees in urban and natural forests and threatens the entire ash resource. In its native range in northern China, far eastern Russia, Japan, and Korea, it is generally only a pest of non-native ash or indigenous ash species that are stressed by other factors. Healthy “lingering” ash trees were selected for propagation that survived for >2 yrs after stand mortality due to EAB exceeded 95% in forested areas throughout Ohio and southeast Michigan. We compared the number of EAB adults present on leaves and area of foliage consumed for different lingering ash genotypes and susceptible controls in multiple choice experiments. We also compared larval performance by affixing eggs onto grafted ramets of lingering ash selections and susceptible controls. Some lingering ash selections displayed resistance to EAB through reduced feeding by EAB adults, lower larval weight, delayed larval development, and/or larger numbers of larvae killed by host tree defenses. These measurable phenotypes likely explain why some ash genotypes have survived EAB attack longer than the majority of their counterparts, and indicate that more than one mechanism may be responsible.