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, 98 (6), 2143-52

Response of the Formosan Subterranean Termites (Isoptera: Rhinotermitidae) to Baits or Nonrepellent Termiticides in Extended Foraging Arenas

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Response of the Formosan Subterranean Termites (Isoptera: Rhinotermitidae) to Baits or Nonrepellent Termiticides in Extended Foraging Arenas

Nan-Yao Su. J Econ Entomol.

Abstract

Distance effects of three treatments, noviflumuron, fipronil, and thiamethoxam, against laboratory populations of the Formosan subterranean termite, Coptotermesformosanus Shiraki, were tested in extended foraging arenas with foraging distances of 50 m. The results showed that during the 10-wk test period, all termites were killed by noviflumuron baits, whereas the nonrepellent termiticides fipronil and thiamethoxam divided the laboratory populations into two groups after causing 25-35% worker mortality. The horizontal transfer of lethal effects of fipronil was < or = 5 m. For thiamethoxam, the distance of transfer was substantially shorter. Because of their dose-dependent lethal time, the nonrepellent termiticides did not fulfill the requirements of a liquid bait model.

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