scholarly journals Polymorphism at dinucleotide microsatellite loci in fire ant Solenopsis invicta populations

1997 ◽  
Vol 6 (10) ◽  
pp. 997-999 ◽  
Author(s):  
M. J. B. Krieger ◽  
L. Keller
Keyword(s):  
Microsatellite Loci ◽  
Solenopsis Invicta ◽  
Fire Ant ◽  
In Fire

scholarly journals Naturally Occurring Compounds/Materials as Alternatives to Synthetic Chemical Insecticides for Use in Fire Ant Management

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 758
Author(s):  
Jian Chen ◽  
David H. Oi
Keyword(s):  
Solenopsis Invicta ◽  
Fire Ants ◽  
Fire Ant ◽  
Red Imported Fire Ant ◽  
Natural Toxins ◽  
Naturally Occurring ◽  
Solenopsis Invicta Buren ◽  
In Fire ◽  
Imported Fire Ant ◽  
Made In

The invasive red imported fire ant, Solenopsis invicta Buren (hereafter, fire ants), is a significant threat to public health and a danger to livestock, pets and wildlife due to their venomous stings. The fire ant has invaded many countries and regions and has become a globally significant pest. The current major tool to manage fire ants are synthetic insecticides that are used largely as stomach poisons in bait products or contact insecticides in spray, broadcast, drench, and dust products for area and nest treatments. In addition to these insecticide products, repellants and fumigants can also be useful in some unique scenarios. The ever-increasing public concern about the potential adverse effects of synthetic insecticides on health and the environment has been a driving force for searching for safer alternatives to control fire ants. Tremendous effort has been made in developing biologically-based control for managing fire ants; however, natural products continue to be one of the most attractive sources of safe alternatives to synthetic insecticides. Here, we summarized the synthetic insecticides that are currently used in managing fire ants, available alternative products in the current market, and academic efforts in searching for fire ant natural toxins, repellants and fumigants.

scholarly journals Treadmilling and dynamic protrusions in fire ant rafts

2021 ◽  
Vol 18 (179) ◽  
pp. 20210213
Author(s):  
Robert J. Wagner ◽  
Kristen Such ◽  
Ethan Hobbs ◽  
Franck J. Vernerey
Keyword(s):  
Solenopsis Invicta ◽  
Fire Ants ◽  
Fire Ant ◽  
Shape Evolution ◽  
Experimental Characterization ◽  
Structural Network ◽  
Directional Motion ◽  
Dynamic Structures ◽  
In Fire ◽  
Strong Confinement

Fire ants ( Solenopsis invicta ) are exemplary for their formation of cohered, buoyant and dynamic structures composed entirely of their own bodies when exposed to flooded environments. Here, we observe tether-like protrusions that emerge from aggregated fire ant rafts when docked to stationary, vertical rods. Ant rafts comprise a floating, structural network of interconnected ants on which a layer of freely active ants walk. We show here that sustained shape evolution is permitted by the competing mechanisms of perpetual raft contraction aided by the transition of bulk structural ants to the free active layer and outward raft expansion owing to the deposition of free ants into the structural network at the edges, culminating in global treadmilling. Furthermore, we see that protrusions emerge as a result of asymmetries in the edge deposition rate of free ants. Employing both experimental characterization and a model for self-propelled particles in strong confinement, we interpret that these asymmetries are likely to occur stochastically owing to wall accumulation effects and directional motion of active ants when strongly confined by the protrusions' relatively narrow boundaries. Together, these effects may realize the cooperative, yet spontaneous formation of protrusions that fire ants sometimes use for functional exploration and to escape flooded environments.

Characterization of expressed sequence tag (EST)-derived microsatellite loci in the fire ant Solenopsis invicta (Hymenoptera: Formicidae)

2008 ◽  
Vol 10 (5) ◽  
pp. 1373-1376 ◽  
Author(s):  
Zeng-Qiang Qian ◽  
Y. Ching Crozier ◽  
Birgit C. Schlick-Steiner ◽  
Florian M. Steiner ◽  
Ross H. Crozier
Keyword(s):  
Microsatellite Loci ◽  
Solenopsis Invicta ◽  
Expressed Sequence Tag ◽  
Fire Ant ◽  
Expressed Sequence

scholarly journals Hierarchical Analysis of Genetic Structure in Native Fire Ant Populations: Results From Three Classes of Molecular Markers

Genetics ◽  
1997 ◽  
Vol 147 (2) ◽  
pp. 643-655 ◽  
Author(s):  
Kenneth G Ross ◽  
Michael J B Krieger ◽  
D DeWayne Shoemaker ◽  
Edward L Vargo ◽  
Laurent Keller
Keyword(s):  
Gene Flow ◽  
Genetic Structure ◽  
Solenopsis Invicta ◽  
Large Scale ◽  
Fire Ant ◽  
Nuclear Markers ◽  
Social Forms ◽  
Native Populations ◽  
Nest Level ◽  
Nuclear Differentiation

We describe genetic structure at various scales in native populations of the fire ant Solenopsis invicta using two classes of nuclear markers, allozymes and microsatellites, and markers of the mitochondrial genome. Strong structure was found at the nest level in both the monogyne (single queen) and polygyne (multiple queen) social forms using allozymes. Weak but significant microgeographic structure was detected above the nest level in polygyne populations but not in monogyne populations using both classes of nuclear markers. Pronounced mitochondrial DNA (mtDNA) differentiation was evident also at this level in the polygyne form only. These microgeographic patterns are expected because polygyny in ants is associated with restricted local gene flow due mainly to limited vagility of queens. Weak but significant nuclear differentiation was detected between sympatric social forms, and strong mtDNA differentiation also was found at this level. Thus, queens of each form seem unable to establish themselves in nests of the alternate type, and some degree of assortative mating by form may exist as well. Strong differentiation was found between the two study regions usinga all three sets of markers. Phylogeographic analyses of the mtDNA suggest that recent limitations on gene flow rather than longstanding barriers to dispersal are responsible for this large-scale structure.

scholarly journals Acute toxicity of typical ant control agents to the red imported fire ant, Solenopsis invicta (Hymenoptera: Formicidae)

2021 ◽  
Vol 56 (2) ◽  
pp. 217-224
Author(s):  
Hironori Sakamoto ◽  
Koichi Goka
Keyword(s):  
Acute Toxicity ◽  
Chemical Control ◽  
Solenopsis Invicta ◽  
Fire Ant ◽  
Red Imported Fire Ant ◽  
The Pacific ◽  
New Type ◽  
Ant Control ◽  
Abnormal Behaviors ◽  
Imported Fire Ant

AbstractThe red imported fire ant Solenopsis invicta Buren (Hymenoptera: Formicidae), is a serious invasive alien ant around the world and has expanded its invasive range to the Pacific Rim since the early 2000s. It was first reported in Japan in 2017, and its entry through cargo has been reported numerous times in many ports. Colonies have been found in Tokyo Port since 2019, and now it is an urgent issue to prevent further invasion and establishment. Chemical control is the best tested method of insect control, but we have little information on the efficacy of insecticides against S. invicta in Japan. Here, we conducted acute toxicity assays of six quick-acting pyrethroids (transfluthrin, prallethrin, phenothrin, permethrin, metofluthrin, and pyrethrin) for killing adults and five new-type insecticides (fipronil, thiamethoxam, indoxacarb, imidacloprid, and hydramethylnon) for controlling colonies with toxic baits. We found that the LD50 from six pyrethroids were comparable to each other. The ED50 causing abnormal behaviors were smaller than LD50, but some ants recovered from paralysis within 12 h. Fipronil showed the lowest LD50 suggesting this chemical is the most promising agent for controlling S. invicta. Our results promise to develop a method for the chemical control of S. invicta.

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