Florida Entomologist (2009) 92, 362-366

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Jeffrey P. Shapiro, Paul D. Shirk, Stuart R. Reitz and Rose Koenig (2009)
Sympathy of Orius insidiosus and O. pumilio (Hemiptera: Anthocoridae) in north central Florida
Florida Entomologist 92 (2), 362-366
Abstract: Two closely related species of Anthocoridae, the minute pirate bugs Orius insidiosus (Say) and O. pumilio (Champion), were collected together from false Queen Anne's lace/ large bullwort (Ammi majus) planted on an organic farm in Gainesville, Alachua Co., FL., over a period of 5 successive weeks. The presumptive prey on the false Queen Anne's lace was a single species of thrips, Frankliniella bispinosa (Morgan). In the first 4 weekly collections from the flower heads, the densities of O. insidiosus adults were 2.7-fold higher than those of O. pumilio. No eggs or nymphs of either species were observed on the plants. Sex ratios (males:females) of 2.7 and 1.0 were observed for O. insidiosus and O. pumilio, respectively. A colony of O. insidiosus was established from field-collected specimens. The sex ratio of the F1 generation from this colony was 1.0, suggesting that the skewed field sex ratio was not a genetic phenomenon. These data demonstrate that these sympatric predators coexist at least temporarily, feeding on pests of the false Queen Anne's lace.
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Full text of article
Database assignments for author(s): Stuart R. Reitz

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation


Pest and/or beneficial records:

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


Frankliniella bispinosa Ammi (crop) U.S.A. (SE)
Orius insidiosus (predator) Frankliniella bispinosa Ammi (crop) U.S.A. (SE)
Orius pumilio (predator) Frankliniella bispinosa Ammi (crop) U.S.A. (SE)