Development of Liquid Bait with Unique Bait Station for Control of Dolichoderus thoracicus (Hymenoptera: Formicidae)

Chung Chi Lin, Tsai Wei Chang, Hung Wei Chen, Chung Han Shih, Po Cheng Hsu

Research output: Contribution to journalArticlepeer-review


The Dolichoderus thoracicus (Smith) has seriously infested urban, village, and agricultural environments in Taiwan. To develop optimal bait for the effective control of D. thoracicus, we investigated the feeding preferences of this ant at different sugar and amino acid concentrations in a laboratory setting. The number of feeding workers was significantly higher for 20% sucrose compared with that for other sugars at 10% and 20% concentrations. Furthermore, among all tested concentrations of monosodium glutamate (MSG; 1%, 3%, 5%, and 10%), the highest number of ants were attracted by 1% MSG with 20% sucrose. The consumption of each bait solution was also measured, and the results were similar to those for ant number. Regarding toxicants, the toxicity and repellency of 3% boric acid and borax bait were evaluated individually. Both 3% boric acid and borax demonstrated no repellency against D. thoracicus workers. The LT 50 of the 3% boric acid bait was 4.87 d, whereas that of 3% borax bait was only 1.56 d. Thus, 3% boric acid showed further delayed action, facilitating workers spreading the toxicant to their nestmates through trophallaxis. In combination with our unique bait station, we propose an optimal bait formulation comprising 20% sucrose, 1% MSG, and 3% boric acid as a promising candidate for controlling D. thoracicus.

Original languageEnglish
Pages (from-to)1685-1692
Number of pages8
JournalJournal of Economic Entomology
Issue number4
Publication statusPublished - 2017 Aug 1

All Science Journal Classification (ASJC) codes

  • Ecology
  • Insect Science

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