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ViewAttendees 4

Plant-Insect Ecosystems

Student Competition 10-Minute Paper

Grad P-IE: Chemical Ecology

Assessment of ambrosia beetle attack using repellents in ethanol infused bolts to facilitate its effective management

Monday, November 14, 2022
10:42 AM – 10:54 AM PT
Location: Vancouver Convention Centre, Meeting Room 211
In-Person Student Competition

    Presenting Author(s)

  • Anju Poudel

    Graduate Research Assistant
    Tennessee State University
    McMinnville, Tennessee

    • Co-Author(s)

  • KA

    Karla Michele Addesso

    Research Associate Professor
    Tennessee State University
    McMinnville, Tennessee

  • CP

    Cindy L. Perkovich

    Assistant Professor of Biology
    Ashland University
    Barberton, Ohio

  • Jason B. Oliver

    Research Professor of Entomology
    Tennessee State University, Otis L. Floyd Nursery Research Center (TSU-NRC)
    McMinnville, Tennessee

  • Agenor Mafra-Neto

    Chief Executive Officer
    ISCA Technologies
    Riverside, California

  • Jesse Andres Saroli

    Biology Manager
    ISCA Technologies
    Riverside, California

Ambrosia beetles (Coleoptera: Scolytidae) (ABs) are critical pests of ornamental nursery trees. When stressed, trees emit ethanol which attracts AB. AB management is limited by the lack of effective pesticides. To reduce AB pressure on nursery trees, we investigated the impact of previously reported repellent compounds. Three experiments were conducted using ethanol baited bolts to assess the efficacy of these repellents. In the first experiment, we used ethanol baited balsa (Ochroma pyramidale) bolts with repellent. Treatments: cedarwood oil (CO2-derived), 2-butoxyethanol, 2-ethyl-1-hexanol, an experimental repellent formulation by ISCA (EF), and untreated control. In a second experiment, we assessed the ability of the EF to repel ABs from ethanol baited dogwood (Cornus florida) bolts at increasing rates of ethanol emission (low, medium, high). In a third experiment, we assessed the effect of distance of EF efficacy with ethanol baited bolts placed at 0.5 m intervals away from a bolt with EF repellent. Experimental bolts were placed in the field in a randomized block design. Our preliminary findings suggest that repellent technologies may be useful for reducing borer attacks on stressed trees. We will discuss our results in the context of developing an effective an effective AB management system for use in ornamental nursery production.