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Naturally occurring egg parasitoids of the genus Trichogramma (Hymenoptera: Trichogrammatidae) in a pomegranate orchard in Tunisia

Authors

  • Ines KSENTINI,

    1. Olive Tree Institute, Laboratory of Plant protection and Environment, Sfax, Tunisia;
    2. Sfax Faculty of Sciences, Life Sciences Department, Sfax, Tunisia
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  • Juan Carlos MONJE,

    Corresponding author
    1. University of Hohenheim, Institute of Phytomedicine, Department of Applied Entomology, Stuttgart, Germany; and
      Present address: Juan Carlos Monje, State Museum of Natural History Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany. Email: monje.smns@naturkundemuseum-bw.de
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  • Taieb JARDAK,

    1. Olive Tree Institute, Laboratory of Plant protection and Environment, Sfax, Tunisia;
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  • Najiba ZEGHAL

    1. Sfax Faculty of Sciences, Life Sciences Department, Sfax, Tunisia
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Present address: Juan Carlos Monje, State Museum of Natural History Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany. Email: monje.smns@naturkundemuseum-bw.de

Abstract

Four Trichogramma species were found in a pomegranate orchard in Gabès, an arid region of Tunisia, from parasitized eggs of Ectomyelois ceratoniae Zeller (Lepidoptera: Pyralidae), an economically important insect pest. Identification based on assessment of male genitalia and internal transcribed spacer 2 (ITS2) sequences showed that they were T. bourarachae Pintureau and Babault, 1988, T. oleae Voegelé and Pointel, 1979, T. cacoeciae Marchal, 1927 and T. evanescens Westwood, 1833. Trichogramma evanescens is reported for the first time in Tunisia. Trichogramma cacoeciae was the largely dominant species in the analyzed samples, whereas T. bourarachae was present in a minor portion of 1.38%. The implications of these results for attempts at controlling E. ceratoniae are discussed.

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