Full TGIF Record # 213834
Item 1 of 1
DOI:10.1016/j.biocontrol.2012.09.018
Web URL(s):http://www.sciencedirect.com/science/article/pii/S1049964412002071
    Last checked: 12/07/2012
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Porter, Sanford D.; Calcaterra, Luis A.
Author Affiliation:Porter: Center for Medical, Agricultural and Veterinary Entomology, USDA-ARS, Gainesville, FL; Calcaterra: South American Biological Control Laboratory, USDA-ARS, Buenos Aires, Argentina
Title:Dispersal and competitive impacts of a third fire ant decapitating fly (Pseudacteon obtusus) established in North Central Florida
Source:Biological Control: Theory and Application in PestManagement. Vol. 64, No. 1, January 2013, p. 66-74.
Publishing Information:San Diego, California: Academic Press
# of Pages:9
Keywords:TIC Keywords: Competitive ability; Control methods; Insect control; Solenopsis geminata
Geographic Terms:Florida, United States
Abstract/Contents:"Self-sustaining classical biological control agents offer hope for permanent wide-area control of imported Solenopsis fire ants in the United States because escape from abundant natural enemies left behind in Argentina is a likely reason for unusually high fire ant densities in the United States. The fire ant decapitating fly Pseudacteon obtusus Borgmeier (Diptera: Phoridae) was released as a biocontrol agent of the red imported fire ant (Solenopsis invicta Buren) in Gainesville, FL because it is a common parasitoid of this ant in Argentina and because it has a higher propensity of attacking fire ants along foraging trails than the two Pseudacteon species previously released. Field surveys of a rapidly expanding P. obtusus population (8-12 km/yr) proved that this fly was capable of thriving and successfully competing with the much more abundant Pseudacteon curvatus Borgmeier. However, Pseudacteon tricuspis Borgmeier, the first decapitating fly released, was effectively excluded from most sample sites when faced with competition from both P. curvatus and the similar-sized P. obtusus. Despite clear evidence for competitive exclusion, P. tricuspis abundance at sample sites was positively correlated with the abundance of its two competitors-probably because of moderate to strong covariability in the suitability of sample sites for all three congeners. The addition of P. curvatus, the second parasitoid released, increased total parasitism pressure on fire ant populations by about 10-fold. The addition of P. obtusus, the third species, did not measurably improve total guild parasitism rates on imported fire ants in North Central Florida (as assessed by roadside trap counts), but the performance of this species will likely vary with habitat, region, and climate."
Language:English
References:64
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Porter, S. D., and L. A. Calcaterra. 2013. Dispersal and competitive impacts of a third fire ant decapitating fly (Pseudacteon obtusus) established in North Central Florida. Biol. Control: Theory Appl. Pest Manage. 64(1):p. 66-74.
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DOI: 10.1016/j.biocontrol.2012.09.018
Web URL(s):
http://www.sciencedirect.com/science/article/pii/S1049964412002071
    Last checked: 12/07/2012
    Access conditions: Item is within a limited-access website
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