Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate
We assessed the efficacy of a discontinuous soil treatment using a diluent of fipronil suspension concentrate in controlling colonies of <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i>. In-ground monitoring stations were installed at Isogi Park and Kindai Uni...
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MDPI AG
2021-04-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/12/4/334 |
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| author | Shuji Itakura Johji Ohdake Takashi Takino Kiwamu Umezawa |
| author_facet | Shuji Itakura Johji Ohdake Takashi Takino Kiwamu Umezawa |
| author_sort | Shuji Itakura |
| collection | DOAJ |
| description | We assessed the efficacy of a discontinuous soil treatment using a diluent of fipronil suspension concentrate in controlling colonies of <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i>. In-ground monitoring stations were installed at Isogi Park and Kindai University, and individual termites inhabiting the stations were collected for four or six years to determine the numbers and locations of colonies present in test areas before and after the discontinuous soil treatment. Microsatellite genotyping indicated that two <i>C. formosanus</i> and two <i>R. speratus</i> colonies in the test area at Isogi Park and five <i>R. speratus</i> colonies in the test area at Kindai University were active and that their territories fluctuated every year. One of the two <i>C. formosanus</i> colonies at Isogi Park and one of the five <i>R. speratus</i> colonies at Kindai University were subjected to discontinuous soil treatments with fipronil and were strongly affected by the treatment at the colony level, resulting in the suppression and possible elimination of colonies. Termite activity of the fipronil-treated colony of <i>C. formosanus</i> was detected within one week after the discontinuous soil treatment and was not found for more than two years (28 months), while termite activity of the fipronil-treated colony of <i>R. speratus</i> was detected within four days and three weeks after the discontinuous soil treatment and was not detected thereafter for three years. Fipronil residue analysis showed that workers of <i>C. formosanus</i> moved at least 28 m and that workers of <i>R. speratus</i> moved 6 m from the treated soil locations for up to three weeks. |
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| language | English |
| last_indexed | 2024-03-10T12:29:53Z |
| publishDate | 2021-04-01 |
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| series | Insects |
| spelling | doaj.art-623a5dd1718745d3825df0d4d2b008982023-11-21T14:44:56ZengMDPI AGInsects2075-44502021-04-0112433410.3390/insects12040334Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension ConcentrateShuji Itakura0Johji Ohdake1Takashi Takino2Kiwamu Umezawa3Department of Applied Biological Chemistry, Faculty of Agriculture, Kindai University, 3327-204 Naka-machi, Nara 631-8505, JapanBayer Crop Science, 1-6-5, Marunouchi, Chiyoda-ku, Tokyo 100-8262, JapanDevelopment Center, Bayer Crop Science, 9511-4, Yuki, Ibaraki 307-0001, JapanDepartment of Applied Biological Chemistry, Faculty of Agriculture, Kindai University, 3327-204 Naka-machi, Nara 631-8505, JapanWe assessed the efficacy of a discontinuous soil treatment using a diluent of fipronil suspension concentrate in controlling colonies of <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i>. In-ground monitoring stations were installed at Isogi Park and Kindai University, and individual termites inhabiting the stations were collected for four or six years to determine the numbers and locations of colonies present in test areas before and after the discontinuous soil treatment. Microsatellite genotyping indicated that two <i>C. formosanus</i> and two <i>R. speratus</i> colonies in the test area at Isogi Park and five <i>R. speratus</i> colonies in the test area at Kindai University were active and that their territories fluctuated every year. One of the two <i>C. formosanus</i> colonies at Isogi Park and one of the five <i>R. speratus</i> colonies at Kindai University were subjected to discontinuous soil treatments with fipronil and were strongly affected by the treatment at the colony level, resulting in the suppression and possible elimination of colonies. Termite activity of the fipronil-treated colony of <i>C. formosanus</i> was detected within one week after the discontinuous soil treatment and was not found for more than two years (28 months), while termite activity of the fipronil-treated colony of <i>R. speratus</i> was detected within four days and three weeks after the discontinuous soil treatment and was not detected thereafter for three years. Fipronil residue analysis showed that workers of <i>C. formosanus</i> moved at least 28 m and that workers of <i>R. speratus</i> moved 6 m from the treated soil locations for up to three weeks.https://www.mdpi.com/2075-4450/12/4/334colony eliminationcolony suppressiondiscontinuous soil treatmentminimal use of insecticidenonrepellent slow-acting termiticide |
| spellingShingle | Shuji Itakura Johji Ohdake Takashi Takino Kiwamu Umezawa Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate Insects colony elimination colony suppression discontinuous soil treatment minimal use of insecticide nonrepellent slow-acting termiticide |
| title | Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate |
| title_full | Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate |
| title_fullStr | Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate |
| title_full_unstemmed | Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate |
| title_short | Colony Suppression and Possible Colony Elimination of the Subterranean Termites <i>Coptotermes formosanus</i> and <i>Reticulitermes speratus</i> by Discontinuous Soil Treatment Using a Diluent of Fipronil Suspension Concentrate |
| title_sort | colony suppression and possible colony elimination of the subterranean termites i coptotermes formosanus i and i reticulitermes speratus i by discontinuous soil treatment using a diluent of fipronil suspension concentrate |
| topic | colony elimination colony suppression discontinuous soil treatment minimal use of insecticide nonrepellent slow-acting termiticide |
| url | https://www.mdpi.com/2075-4450/12/4/334 |
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