Modeling Aedes albopictus response to control methods based on sterilized males release
The Sterile Insect Technique (SIT) is a demographic control procedure consisting in re-leasing males sterilized by ionizing radiations. A workaround technique, named boost-ed SIT, aims at contaminating the sterilized males with pyriproxyfen; the males would then transfer this insecticide to other compartments of the target population (females, breeding sites) through auto-dissemination. To anticipate the effect of SIT and boosted SIT on mosquito populations, they were included into an age-structured population model of Aedes albopictus in the geographical context of La Reunion Island. A sensitiv-ity analysis shows that timing and duration of the male release events, as well as the quantity of sterile males released, are of key importance for both control methods. The persistence of pyriproxyfen in larval habitat appears to be the major determinant for boosted SIT to be more efficient than SIT. While the model appears a powerful tool to investigate release strategies, our findings specifically call for lab experiments towards a better assessment of pyriproxyfen transfer rates and persistence in breeding sites.
| Main Authors: | , , , , |
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| Format: | conference_item biblioteca |
| Language: | eng |
| Published: |
E-SOVE
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| Online Access: | http://agritrop.cirad.fr/590427/ http://agritrop.cirad.fr/590427/7/ID590427.pdf |
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| Summary: | The Sterile Insect Technique (SIT) is a demographic control procedure consisting in re-leasing males sterilized by ionizing radiations. A workaround technique, named boost-ed SIT, aims at contaminating the sterilized males with pyriproxyfen; the males would then transfer this insecticide to other compartments of the target population (females, breeding sites) through auto-dissemination. To anticipate the effect of SIT and boosted SIT on mosquito populations, they were included into an age-structured population model of Aedes albopictus in the geographical context of La Reunion Island. A sensitiv-ity analysis shows that timing and duration of the male release events, as well as the quantity of sterile males released, are of key importance for both control methods. The persistence of pyriproxyfen in larval habitat appears to be the major determinant for boosted SIT to be more efficient than SIT. While the model appears a powerful tool to investigate release strategies, our findings specifically call for lab experiments towards a better assessment of pyriproxyfen transfer rates and persistence in breeding sites. |
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