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Plant-Insect Ecosystems

10-Minute Paper

P-IE: Chemical Ecology

Screening of volatile compounds used in host location by the faba bean stem borer, Lixus algirus on faba bean in Morocco

Tuesday, November 2, 2021
3:42 PM - 3:54 PM MT
Location: Colorado Convention Center, Meeting Room 108-110
In-Person

    Presenting Author(s)

  • KE

    Karim El Fakhouri

    Mohammed VI Polytechnic University
    Ben Guerir, Marrakech-Tensift-Al Haouz, Morocco

    • Co-Author(s)

  • JH

    Juan Huang

    Senior Research Associate
    Michigan State University
    Okemos, Michigan

  • AS

    Abdelhadi Sabraoui

    ICARDA
    Rabat, Rabat-Sale-Zemmour-Zaer, Morocco

  • AA

    Abderrahim Aasfar

    Moroccan Foundation for Advanced Science, Innovation and Research, Rabat-Sale-Zemmour-Zaer, Morocco

  • IK

    Issam Meftah KADMIRI

    Moroccan Foundation for Advanced Science, Innovation and Research
    Rabat, Rabat-Sale-Zemmour-Zaer, Morocco

  • ME

    Mustapha El Bouhssini

    Mohammed VI Polytechnic University
    Ben Guerir, Marrakech-Tensift-Al Haouz, Morocco

  • LG

    Larry Gut

    MSU
    EAST LANSING, Michigan

The faba bean stem borer (Lixus algirus L.) (Coleoptera: Curculionoidae) is considered one of the major insect pest of faba bean in the Mediterranean region including Morocco. The severe damage is mainly caused by larval feeding inside the stem of plants. Despite the economic importance of this insect pest, there is little information available regarding the role of faba bean volatiles in host finding by Lixus algirus in early season. The current study was aimed to (1) identify and compare volatile profiles emitted from faba bean plants in response to various levels of infestation at different developmental stages, (2) evaluate  behavioral response of L.algirus to headspace volatiles collected from infested and intact faba bean plants, and (3) formulate an optimum kairomone lures and evaluate their attractiveness to  L.algirus in the field. Faba bean plants emitted different volatile profiles in response to the infestation level compared to healthy or mechanically damaged plants. Also, plants in the vegetation stage released volatiles different from those in flowering stage. Sixty-six compounds were identified from treated faba bean plants. The green leaf volatiles 3-Hexen-1-ol. acetate. (Z)- and 1-Hexanol. 2-ethyl- and 3-Hexen-1-ol, 1 acetate, (E)- were produced in larger amounts in the infested plants at flowering stage. Both males and females of L.algirus were significantly attracted to healthy host plant volatiles at flowering stage in small wind tunnel and olfactometer bioassays. Designing and developing a trapping system to monitor L.algirus in the field based on these behavioral cues is ongoing.