Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen
An integral part to integrated mosquito management is to ensure chemical products used for area-wide control are effective against a susceptible population of mosquitoes. Prior to conducting an intervention trial using an insect growth regulator, pyriproxyfen, in South Texas to control <i>Aede...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Insects |
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| Online Access: | https://www.mdpi.com/2075-4450/12/5/460 |
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| author | Jose G. Juarez Selene M. Garcia-Luna Christopher M. Roundy Alyssa Branca Michael G. Banfield Gabriel L. Hamer |
| author_facet | Jose G. Juarez Selene M. Garcia-Luna Christopher M. Roundy Alyssa Branca Michael G. Banfield Gabriel L. Hamer |
| author_sort | Jose G. Juarez |
| collection | DOAJ |
| description | An integral part to integrated mosquito management is to ensure chemical products used for area-wide control are effective against a susceptible population of mosquitoes. Prior to conducting an intervention trial using an insect growth regulator, pyriproxyfen, in South Texas to control <i>Aedes aegypti</i>, we conducted a larval bioassay to evaluate baseline levels of susceptibility. We used seven serially-diluted doses ranging from 2.5 ppb to 6.3 × 10<sup>−4</sup> ppb. We observed 100% inhibition emergence (IE) at even the lowest dose of 6.3 × 10<sup>−4</sup> ppb in our susceptible reference colony of <i>Ae. aegypti</i> Liverpool. In our field strain of <i>Ae. aegypti</i> (F5 colonized from South Texas) we observed 79.8% IE at 6.3 × 10<sup>−4</sup> ppb, 17.7% IE at 1.25 × 10<sup>−3</sup> ppb, 98.7% IE at 1.25 × 10<sup>−2</sup> ppb, and 100% emergence inhibition for the remainder of the doses. Given that commercial pyriproxyfen products are labeled for doses ranging to 50 ppb, we conclude that the field population sampled by this study are susceptible to this insect growth regulator. |
| first_indexed | 2024-03-10T11:21:42Z |
| format | Article |
| id | doaj.art-26117028521a4696b59739ee1c5f31a4 |
| institution | Directory Open Access Journal |
| issn | 2075-4450 |
| language | English |
| last_indexed | 2024-03-10T11:21:42Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj.art-26117028521a4696b59739ee1c5f31a42023-11-21T19:59:36ZengMDPI AGInsects2075-44502021-05-0112546010.3390/insects12050460Susceptibility of South Texas <i>Aedes aegypti</i> to PyriproxyfenJose G. Juarez0Selene M. Garcia-Luna1Christopher M. Roundy2Alyssa Branca3Michael G. Banfield4Gabriel L. Hamer5Department of Entomology, Texas A&M University, College Station, TX 77843, USADepartment of Entomology, Texas A&M University, College Station, TX 77843, USADepartment of Entomology, Texas A&M University, College Station, TX 77843, USABanfieldBio Inc., Woodinville, WA 98072, USABanfieldBio Inc., Woodinville, WA 98072, USADepartment of Entomology, Texas A&M University, College Station, TX 77843, USAAn integral part to integrated mosquito management is to ensure chemical products used for area-wide control are effective against a susceptible population of mosquitoes. Prior to conducting an intervention trial using an insect growth regulator, pyriproxyfen, in South Texas to control <i>Aedes aegypti</i>, we conducted a larval bioassay to evaluate baseline levels of susceptibility. We used seven serially-diluted doses ranging from 2.5 ppb to 6.3 × 10<sup>−4</sup> ppb. We observed 100% inhibition emergence (IE) at even the lowest dose of 6.3 × 10<sup>−4</sup> ppb in our susceptible reference colony of <i>Ae. aegypti</i> Liverpool. In our field strain of <i>Ae. aegypti</i> (F5 colonized from South Texas) we observed 79.8% IE at 6.3 × 10<sup>−4</sup> ppb, 17.7% IE at 1.25 × 10<sup>−3</sup> ppb, 98.7% IE at 1.25 × 10<sup>−2</sup> ppb, and 100% emergence inhibition for the remainder of the doses. Given that commercial pyriproxyfen products are labeled for doses ranging to 50 ppb, we conclude that the field population sampled by this study are susceptible to this insect growth regulator.https://www.mdpi.com/2075-4450/12/5/460<i>Aedes aegypti</i>pyriproxyfenemergence inhibitionvector controlautodisseminationinsect growth regulator |
| spellingShingle | Jose G. Juarez Selene M. Garcia-Luna Christopher M. Roundy Alyssa Branca Michael G. Banfield Gabriel L. Hamer Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen Insects <i>Aedes aegypti</i> pyriproxyfen emergence inhibition vector control autodissemination insect growth regulator |
| title | Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen |
| title_full | Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen |
| title_fullStr | Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen |
| title_full_unstemmed | Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen |
| title_short | Susceptibility of South Texas <i>Aedes aegypti</i> to Pyriproxyfen |
| title_sort | susceptibility of south texas i aedes aegypti i to pyriproxyfen |
| topic | <i>Aedes aegypti</i> pyriproxyfen emergence inhibition vector control autodissemination insect growth regulator |
| url | https://www.mdpi.com/2075-4450/12/5/460 |
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