6533b7d0fe1ef96bd125a3fd

RESEARCH PRODUCT

Intraguild interactions between two egg parasitoids exploring host patches

Antonino CusumanoStefano ColazzaS. Bradleigh VinsonEzio Peri

subject

Trissolcus basalis Ooencyrtus telenomicida Nezara viridula Interspecific competition Counter-balanced competitionbiologyGreen stink bugEcologymedia_common.quotation_subjectfungibiology.organism_classificationCompetition (biology)ParasitoidSettore AGR/11 - Entomologia Generale E ApplicataEncyrtidaeAnimal ecologyNezara viridulaInsect ScienceAgronomy and Crop ScienceIntraguild predationScelionidaemedia_common

description

Intraguild interactions between two egg parasitoids, Trissolcus basalis (Hymenoptera: Scelionidae) and Ooencyrtus telenomicida (Hymenoptera: Encyrtidae), exploring egg masses of the Southern Green Stink Bug (SGSB) Nezara viridula (Heteroptera: Pentatomidae), were investigated in laboratory conditions by single, simultaneous and sequential host attack experiments. Mortality of N. viridula eggs was higher in simultaneous and sequential releases compared to single species releases. In simultaneous host exploitations, T. basalis females displayed an aggressive behavior against O. telenomicida females. The outcome of multiparasitism showed that interspecific larval competition was dominated by O. telenomicida regardless of the sequence in which oviposition occurred and which parasitoid was or was not simultaneously released in the patch. Finally, O. telenomicida can successfully develop in hosts already parasitized by T. basalis up to seven days earlier, acting as a facultative hyperparasitoid, so that intraguild predation (IGP) also occurred. The ecological factors that allow species coexistence and the role played by competition in biological control programs are discussed.

yearjournalcountryeditionlanguage
2010-10-16
10.1007/s10526-010-9320-zhttp://hdl.handle.net/10447/53937