Journal of Economic Entomology (2002) 95, 1151-1158

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Patricia J. Folgarait, Octavio A. Bruzzone, Richard J.W. Patrock and Lawrence E. Gilbert (2002)
Developmental rates and host specificity for Pseudacteon parasitoids (Diptera: Phoridae) of fire ants (Hymenoptera: Formicidae) in Argentina
Journal of Economic Entomology 95 (6), 1151-1158
Abstract: This study extends our comparative knowledge of Pseudacteon interactions with Solenopsis fire ant workers. Reported in this work are development times for seven Argentinean parasitoid species reared on two hosts, Solenopsis richteri Forel and Solenopsis invicta Buren, under laboratory temperature regimes comparable with those of the climatic zones occupied by these host species. Developmental times spanned 31–66 d across phorid species, and in general did not differ between genders or host species, but were longer at lower temperatures. The size distribution of flies reared was bimodal, with a group of large (Pseudacteon borgmeieri, Pseudacteon nocens, Pseudacteon obtusus, and Pseudacteon tricuspis) and small (Pseudacteon cultellatus, Pseudacteon curvatus, and Pseudacteon nudicornis) species. P. borgmeieri was exceptional with respect to length of developmental time. Also reported are results of initial oviposition and developmental studies of some of these phorid species on other Argentinean Solenopsis ant species; P. curvatus was the only species able to complete its development on nonhost fire ants. These results support the concept of incorporating several complementary species of Pseudacteon in the biological control of pest fire ants.
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Database assignments for author(s): Patricia J. Folgarait, Lawrence E. Gilbert

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Solenopsis invicta Argentina
Solenopsis richteri Argentina
Pseudacteon tricuspis (parasitoid) Solenopsis invicta Argentina
Pseudacteon tricuspis (parasitoid) Solenopsis richteri Argentina
Pseudacteon curvatus (parasitoid) Solenopsis invicta Argentina
Pseudacteon obtusus (parasitoid) Solenopsis invicta Argentina
Pseudacteon borgmeieri (parasitoid) Solenopsis invicta Argentina
Pseudacteon cultellatus (parasitoid) Solenopsis invicta Argentina
Pseudacteon cultellatus (parasitoid) Solenopsis richteri Argentina
Pseudacteon nocens (parasitoid) Solenopsis invicta Argentina
Pseudacteon nudicornis (parasitoid) Solenopsis invicta Argentina