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vol.47 número2Natural incidence and biology of Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera, Trichogrammatidae) in eggs of Anticarsia gemmatalis Hübner, 1818 (Lepidoptera, Noctuidae)Arthropods associated with the canopy of the palm Attalea phalerata Mart. (Arecaceae), in the Pantanal of Poconé, Mato Grosso, Brazil índice de autoresíndice de materiabúsqueda de artículos
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Revista Brasileira de Entomologia

versión impresa ISSN 0085-5626versión On-line ISSN 1806-9665


BESERRA, Eduardo B.  y  PARRA, José R. P.. Parasitism behavior of Trichogramma atopovirilia Oatman & Platner and Trichogramma pretiosum Riley (Hymenoptera, Trichogrammatidae) in Spodoptera frugiperda (J. E. Smith) (Lepidoptera, Noctuidae) egg masses. Rev. Bras. entomol. [online]. 2003, vol.47, n.2, pp.205-209. ISSN 0085-5626.

The parasitism behavior of Trichogramma atopovirilia and T. pretiosum in Spodoptera frugiperda eggs was evaluated focusing on the features related to the associative learning (alpha conditioning) and recognition of the egg parasitized by the female after the first oviposition experience. Females of both species were observed to recognize the parasitized egg, which takes place after the female drills into the host egg. Following oviposition, 43.59% and 67.53 of females began to feed with an average feeding time of 73.26 ± 11.57 and 64.04 ± 7.05 seconds for T. atopovirilia and T. pretiosum, respectively. The time elapsed in each step of the parasitism behavior significantly decreased after the first oviposition experience, with a trend to stabilize after the 2nd or 3rd egg parasitized, indicating associative learning in these Trichogramma species.

Palabras clave : Egg parasitoid [fall armyworm]; Egg parasitoid [learning]; Egg parasitoid [parasitization].

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