Full TGIF Record # 102576
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Web URL(s):http://www.bioone.org/bioone/?request=get-document&issn=0046-225X&volume=034&issue=01&page=0124
    Last checked: 11/2005
    Access conditions: Item is within a limited access website
Publication Type:
i
Refereed
Author(s):Briano, Juan A.
Author Affiliation:USDA-ARS South American Biological Control Laboratory, Buenos Aires Province, Argentina
Title:Long-term studies of the red imported fire ant, Solenopsis invicta, infected with the microsporidia Vairimorpha invictae and Thelohania solenopsae in Argentina
Section:Biocontrol-microbials
Other records with the "Biocontrol-microbials" Section
Source:Environmental Entomology. Vol. 34, No. 1, February 2005, p. 124-132.
# of Pages:9
Publishing Information:College Park, MD: Entomological Society of America
Keywords:TIC Keywords: Solenopsis invicta; Infection; Biological control; Population dynamics
Abstract/Contents:"A study was conducted on populations of the red imported fire ant, Solenopsis invicta Buren (Hymenoptera: Formicidae), infected with the microsporidia Vairimorpha invictae Jouvenaz and Ellis (Microsporidia: Burenellidae) and Thelohania solenopsae Knell, Allen, and Hazard (Microsporidia: Thelohaniidae). Fire ant populations and microsporidia prevalence were monitored three to five times per year for 3-4 yr in eight field plots in northern Argentina. The mean population index per plot showed an overall reduction of 69%. the percentage of infection with V. invictae and T. solenopsae showed fluctuations that ranged from 29.2 to 1.4% and 13.6 to 2.6%, respectively. The highest infection rates were observed at the beginning of the study. A total of 394 colonies were sampled during the study: 325 (82.5%) were healthy and 69 (17.5%) were infected with microsporidia. The proportion of infected colonies with brood was 81% (56/69), similar to the proportion of healthy colonies with brood (78%; 255/325). The proportion of infected and healthy colonies in the population index categories was significantly different. Of the infected colonies with brood, 49.3% were medium and 1.4% were large in size. In contrast, healthy colonies were generally larger, with 29.7 and 10.4% being medium and large, respectively. The general environmental conditions in the area of the plots were appropriate for fire ant population growth; consequently, they do not explain the overall reduction in the populations. These results, combined with additional evidence reported previously, suggest that infection with V. invictae and T. solenopsae has a deleterious effect on native populations of S. invicta."
Language:English
References:28
Note:Tables
Graphs
Geographic Terms:Argentina
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Briano, J. A. 2005. Long-term studies of the red imported fire ant, Solenopsis invicta, infected with the microsporidia Vairimorpha invictae and Thelohania solenopsae in Argentina. Environ. Entomol. 34(1):p. 124-132.
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Web URL(s):
http://www.bioone.org/bioone/?request=get-document&issn=0046-225X&volume=034&issue=01&page=0124
    Last checked: 11/2005
    Access conditions: Item is within a limited access website
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MSU catalog number: SB 599 .E44
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