Insecticide transfer efficiency and lethal load in Argentine ants

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:361

Article; Proceedings Paper

Hooper-Bui, L. M.^1,2  Kwok, E. S. C.³  Buchholz, B. A.^4,5  Rust, M. K.²  Eastmond, D. A.³  Vogel, J. S.⁴ 

[1] Louisiana State Univ, Dept Environm Sci, Baton Rouge, LA 70803 USA

[2] Univ Calif Riverside, Dept Entomol, Riverside, CA 92521 USA

[3] Univ Calif Riverside, Dept Cell Biol & Neurosci, Riverside, CA 92521 USA

[4] Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA

[5] Univ Calif Davis, Dept Environm Toxicol, Davis, CA 95616 USA

关键词: Argentine ant;    Trophallaxis;    Hydramethylnon;    Fipronil;    Accelerator mass spectrometry (AMS);   

DOI  :  10.1016/j.nimb.2015.06.031

来源: Elsevier

【 摘 要 】

Trophallaxis between individual worker ants and the toxicant load in dead and live Argentine ants (Linepithema humile) in colonies exposed to fipronil and hydramethylnon experimental baits were examined using accelerator mass spectrometry (AMS). About 50% of the content of the crop containing trace levels of C-14-sucrose, C-14-hydramethylnon, and C-14-fipronil was shared between single donor and recipient ants. Dead workers and queens contained significantly more hydramethylnon (122.7 and 22.4 amol/mu g ant, respectively) than did live workers and queens (96.3 and 10.4 amol/mu g ant, respectively). Dead workers had significantly more fipronil (420.3 amol/mu g ant) than did live workers (208.5 amol/mu g ant), but dead and live queens had equal fipronil levels (59.5 and 54.3 amol/mu g ant, respectively). The distribution of fipronil differed within the bodies of dead and live queens; the highest amounts of fipronil were recovered in the thorax of dead queens whereas live queens had the highest levels in the head. Resurgence of polygynous ant colonies treated with hydramethylnon baits may be explained by queen survival resulting from sublethal doses due to a slowing of trophallaxis throughout the colony. Bait strategies and dose levels for controlling insect pests need to be based on the specific toxicant properties and trophic strategies for targeting the entire colony. (C) 2015 Elsevier B.V. All rights reserved.

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