Lethal dose and horizontal transfer of bistrifluron, a benzoylphenylurea, in workers of the Formosan subterranean termite (Isoptera: Rhinotermitidae)
| Autor: | Shunichi Kubota, Kunio Tsunoda, Yoshinori Shono, Nobuaki Mito |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Journal of Pesticide Science. 33:243-248 |
| ISSN: | 1349-0923 1348-589X |
| DOI: | 10.1584/jpestics.g08-09 |
| Popis: | The lethal dose and horizontal transmission of bistrifluron were examined in workers of the Formosan subterranean termite Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae) in laboratory no-choice feeding tests. The concentration of bistrifluron in baits was 5,000 ppm (wt/wt) in a series of tests. When termites were exposed to bistrifluron bait for 1 week, toxicity appeared slowly with an LT50 (50% lethal time) of 6.2 weeks. Much faster efficacy was observed after 2-week exposure. The amount of bistrifluron recovered from moribund termites indicated that approximately 400 ng/termite or more bistrifluron should accumulate in a single worker for insecticidal efficacy. The bistrifluron amount analyzed from various body parts of the termite body was not significanly different between immediately after 1-week exposure to bistrifluron bait and after the subsequent 2-week exposure to untreated bait. The rate of bistrifluron transferred from 20 donors to 20 recipients in 1 week was 6% of the amount of bistrifluron taken by the donors during the 1-week exposure to bistrifluron bait, and much smaller amounts of bistrifluron were transferred from donors to recipients for the subsequent 2 weeks. The bistrifluron that was originally ingested by C. formosanus workers appeared to partly remain in the termite body. |
| Databáze: | OpenAIRE |
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