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Preliminary investigation of food source preferences of the parasitoidTrichogramma platneri Nagarkatti (Hymenoptera, Trichogrammatidae)

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Abstract

The daily survival rate was investigated ofTrichogramma platneri Nag. wasps supplied with flowers (both with and without anthers) of avocado cv. Ettinger and cv. Fuerte, anthers of avocado flowers, or flowers ofOxalis cernua, Mercurialis annua andEuphorbia sp. The life span of wasps supplied with anthers or weed flowers was less than 24 hours, whereas it was longer on avocado. However, none of the avocado varieties appeared outstanding in sustaining the wasps. It follows that nectar is the wasp's preferred or only source of food.

Zusammenfassung

Es wurde die tägliche Überlebensrate vonT. platneri bei Ernährung der Imagines mit Blüten (mit und ohne Staubgefäße) von Avocado var. Ettinger und var. Fuerte, mit Staubgefäßen von Avocado sowie mit Blüten der UnkräuterOxalis cernua, Mercurialis annua undEuphorbia sp. untersucht. Die Lebensdauer der Schlupfwespen war bei Ernährung mit Avocado-Staubgefäßen oder Unkrautblüten geringer (<24 h) als mit Avocado-Blüten. Jedoch schien keine der getesteten Avocado-Varietäten für die Parasitoiden-Erhaltung optimal zu sein. Aus den Ergebnissen geht hervor, daß Nektar die bevorzugte oder gar einzige Nahrungsquelle für die Imagines dieses Parasitoiden ist.

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Author notes

  1. M. Wysoki (Head)

    Present address: Institute of Plant Protection, Department of Entomology, The Volcani Center, Agricultural Research Organization, Bet Dagan 50-250, P.O.B.6, Bet Dagan, Israel

Authors and Affiliations

  1. Dept. of Entomology, State of Israel, Ministry of Agriculture, Agricultural Research Organization, The Volcani Center, Israel

    M. Wysoki (Head)

  2. Laboratory of Experimental Entomology, University of Amsterdam, The Netherlands

    S. Wellinga

Authors
  1. S. Wellinga
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  2. M. Wysoki
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With one table

Contribution from the ARO, The Volcani Center, Bet Dagan, Israel, No. 2354-E, 1989 series. The research was partially supported by Avocado Growers Association and Ministry of Agriculture.

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Wellinga, S., Wysoki, M. Preliminary investigation of food source preferences of the parasitoidTrichogramma platneri Nagarkatti (Hymenoptera, Trichogrammatidae). Anz. Schadlingskde., Pflanzenschutz, Umweltschutz 62, 133–135 (1989). https://doi.org/10.1007/BF01905844

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  • DOI: https://doi.org/10.1007/BF01905844

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