Electrophysiological and alarm behavioral responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to alkoxypyrazines

Sun, Yan; Shao, Kai-Min; Lu, Yongyue; Shi, Qun-Hui; Wang, Wenkai; Chen, Li

doi:10.1016/j.aspen.2017.03.015

Cited by 5 publications

(15 citation statements)

References 19 publications

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“…Although perception of alarm pheromone has an important role in the chemical communication in ants, only few studies have tested EAG responses of ants to their alarm pheromones and related analogs [18,23,24,26,29,30]. EAG responses in fire ant workers under the treatment of 2-ethyl-3,5-dimeth ylpyrazine ranged from 0.06 to 1.56 mV (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

“…The antennal sensitivity of S. invicta workers to 2-ethyl-3,5-dimethylpyrazine was evaluated by conventional EAG methods as described in previous studies [18,24,26]. Briefly, an isolated ant head with antennae was connected between two glass electrodes filled with Ringer's solution modified by Tween ® 80 [27].…”

Section: Antennal Sensitivity Recordingsmentioning

confidence: 99%

“…The alarm sensitivity of S. invicta workers to 2-ethyl-3,5-dimethylpyrazine was determined with the same method as described in previous reports [18,24]. We used the number of ants showing aggressive behaviors such as rapid, undirected running as a measure of alarm responses [18].…”

Section: Alarm Responsementioning

confidence: 99%

“…The activity of 2-ethyl-3,5-dimethylpyrazine in enhancing bait attraction was evaluated using food block tests as described in previous reports [18,24]. In brief, 0.5 g of S. invicta workers were transferred into a plastic tray (55 cm diameter at the bottom) with a moisturized flat cotton wad in a Petri dish (d = 6 cm) at the center.…”

Section: Enhancement In Bait Attractionmentioning

confidence: 99%

“…A previous study has reported the electroantennogram (EAG) and behavioral responses of S. invicta workers to synthetic 2-ethyl-3,6-dimethylpyrazine [24]. However, very limited information on alarm activity of 2-ethyl-3,5-dimethylpyrazine is available for fire ants in the literature.…”

Section: Introductionmentioning

confidence: 99%

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Electrophysiological and Alarm Responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to 2-Ethyl-3,5-dimethylpyrazine

Liu

Chen

2019

Insects

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2-Ethyl-3,5-dimethylpyrazine is an isomer of 2-ethyl-3,6-dimethylpyrazine, the alarm pheromone component of the red imported fire ant, Solenopsis invicta Buren. The pyrazine was synthesized and its alarm activity was investigated under laboratory conditions. It elicited significant electroantennogram (EAG) activities, and released characteristic alarm behaviors in fire ant workers. The EAG and alarm responses were both dose-dependent. Two doses of the pyrazine, 1 and 100 ng, were further subjected to bait discovery bioassays. Fire ant workers excited by the pyrazine were attracted to food baits, and their numbers increased over time. Ants displayed very similar response patterns to both low and high doses of the pyrazine. The pyrazine impregnated onto filter paper disc attracted significantly more fire ant workers than the hexane control for all observation time intervals at the low dose, and in the first 15 min period at the high dose. The pyrazine loaded onto food bait directly tended to attract more fire ant workers than the hexane control. These results support the potential use of 2-ethyl-3,5-dimethylpyrazine to enhance bait attractiveness for the control of S. invicta in invaded regions.

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Section: Discussionmentioning

confidence: 99%

Section: Antennal Sensitivity Recordingsmentioning

confidence: 99%

Section: Alarm Responsementioning

confidence: 99%

Section: Enhancement In Bait Attractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrophysiological and Alarm Responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to 2-Ethyl-3,5-dimethylpyrazine

Liu

Chen

2019

Insects

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A Practical Technique for Electrophysiologically Recording from Lamellated Antenna of Scarab Beetle

Chen

Shao

2019

J Chem Ecol

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Intra- and inter-specific variation in alarm pheromone produced bySolenopsisfire ants

Balusu

Zhang

et al. 2017

Bull. Entomol. Res.

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Some fire ants of the genus Solenopsis have become invasive species in the southern United States displacing native species by competition. Although the displacement pattern seems clear, the mechanisms underlying competitive advantage remain unclear. The ability of ant workers to produce relatively larger amount of alarm pheromone may correspond to relative greater fitness among sympatric fire ant species. Here we report on quantitative intra-specific (i.e. inter-caste) and inter-specific differences of alarm pheromone component, 2-ethyl-3,6-dimethylpyrazine (2E36DMP), for several fire ant species. The alarm pheromone component was extracted by soaking ants in hexane for 48 h and subsequently quantified by gas chromatography-mass spectrometry at single ion monitoring mode. Solenopsis invicta workers had more 2E36DMP than male or female alates by relative weight; individual workers, however, contained significantly less pyrazine. We thus believe that alarm pheromones may serve additional roles in alates. Workers of Solenopsis richteri, S. invicta, and hybrid (S. richteri × S. invicta) had significantly more 2E36DMP than a native fire ant species, Solenopsis geminata. The hybrid fire ant had significantly less 2E36DMP than the two parent species, S. richteri and S. invicta. It seems likely that higher alarm pheromone content may have favored invasion success of exotic fire ants over native species. We discuss the potential role of inter-specific variation in pyrazine content for the relationship between the observed shifts in the spatial distributions of the three exotic fire ant species in southern United States and the displacement of native fire ant species.

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Electrophysiological and alarm behavioral responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to alkoxypyrazines

Cited by 5 publications

References 19 publications

Electrophysiological and Alarm Responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to 2-Ethyl-3,5-dimethylpyrazine

Electrophysiological and Alarm Responses of Solenopsis invicta Buren (Hymenoptera: Formicidae) to 2-Ethyl-3,5-dimethylpyrazine

A Practical Technique for Electrophysiologically Recording from Lamellated Antenna of Scarab Beetle

Intra- and inter-specific variation in alarm pheromone produced bySolenopsisfire ants

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