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Journal of Chemical Ecology

, Volume 20, Issue 10, pp 2673–2685 | Cite as

Evidence for volatile chemical attractants in the beetleMaladera matrida argaman (Coleoptera: Scarabaeidae)

  • Gal Yarden
  • Arnon Shani
Article

Abstract

TheMaladera matrida beetle (Coleoptera, Scarabaeidae, Melolonthinae), a relatively new species to science, was first identified in Israel in 1983. In the course of field observations it was found that adultM. matrida beetles emerged from the soil at sunset to feed and mate. During the first 20 min of flight, most of the beetles were males. The females emerged shortly afterwards, and aggregations numbering 20–30 individuals with equal proportions of males and females were eventually formed on peanut plants. Laboratory olfactometer bioassays showed that peanut leaves (food) attracted both males and females. Field-trapping experiments and olfactometer studies showed thatM. matrida beetles were highly attracted by live virgin females in the presence of food (cut-up peanut leaves). Another set of field trapping experiments indicated that airborne volatiles produced by live virgin females plus food had the same attracting ability as live virgin females plus food. The attraction exerted by the combination of live virgin females and peanut leave volatiles suggests a synergism effect. Accordingly, we propose a two-stage mechanism of chemical communication in theM. matrida beetles: first, the males cause mechanical damage to the host plant to attract both sexes; later, the females emit attractants (sex pheromone) while eating or shortly thereafter.

Key Words

Maladera matrida Coleoptera Scarabaeidae collection of volatiles field trapping olfactometer attractants host plant volatiles synergism aggregation sex pheromone 

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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • Gal Yarden
    • 1
  • Arnon Shani
    • 1
  1. 1.Department of ChemistryBen-Gurion University of the NegevBeer-ShevaIsrael

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