Florida Entomologist (2012) 95, 128-135

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Jian Li, Dakshina R. Seal, Gary L. Leibee and Oscar E. Liburd (2012)
Seasonal abundance and spatial distribution of the leafminer, Liriomyza trifolii (Diptera: Agromyzidae), and its parasitoid, Opius dissitus (Hymenoptera: Braconidae), on bean in southern Florida
Florida Entomologist 95 (1), 128-135
Abstract: Seasonal population densities of Liriomyza trifolii (Burgess) and its parasitoid Opius dissitus (Muesebeck) were studied at 3 snap bean (Phaseolus vulgaris) sites in south Florida from 2010 to 2011. L. trifolii population density presented a seasonal preference, and was significantly abundant during Dec 2010 (17.9 ± 1.5 adults per 5 leaves) and Jan 2011 (30.3 ± 2.7 adults per 5 leaves) when the temperature was relatively low ( ~ 3 °C). Its parasitoid, O. dissitus showed a pattern of population density similar to L. trifolii, and was abundant during December 2010 (4.5 ± 0.45 adults per 5 leaves) and January 2011 (5.4 ± 0.73 adults per 5 leaves). A direct density dependent relationship was found between O. dissitus parasitism and L. trifolii. Spatial distribution patterns of L. trifolii and O. dissitus were evaluated at these 3 bean sites. Both L. trifolii and O. dissitus showed an aggregated (clumped) distribution pattern when their densities were high during Dec 2010 to Jan 2011, but a regular (uniform) distribution pattern when their densities were low during Sep 2010 and Feb 2011.
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Database assignments for author(s): Oscar E. Liburd

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
population dynamics/epizootiology


Pest and/or beneficial records:

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


Liriomyza trifolii Beans (Phaseolus) U.S.A. (SE)
Opius dissitus (parasitoid) Liriomyza trifolii U.S.A. (SE)