Mosquito control programs are utilizing cost-effective long-term autocidal traps targeting the gravid population of container-inhabiting and other mosquito species, with the aim of reducing vector populations and disease transmission risk. In this field study we directly compared the efficacy of the Autocidal Gravid Ovitrap (AGO) and In2Care mosquito traps in St. Augustine, Florida. Total numbers of eggs (Aedes aegypti and Ae. albopictus) and adult mosquitoes were calculated at different weeks of trap deployment, pre-treatment (wk1-2), during-treatment (wk3-6), and post-treatment (wk7-8). There was a 72% reduction in both Aedes eggs in the two sites tested post-trap deployment, compared to pre-trap deployment. The mean numbers of eggs collected in the post-treatment, compared to pre-treatment showed that the In2Care traps had a higher reduction of mosquito oviposition (80%) than the AGO traps (23%). A total of 19 mosquito species included non container-inhabiting mosquitoes, Aedes taeniorhynchus, Culex quinquefasciatus, and Cx. nigripalpus, were collected by BG traps baited with BG lure and dry ice from the test sites. The species abundance varied between the two sites and collection weeks. The container-inhabiting mosquitoes, Aedes aegypti and Ae. albopictus were the major species. There was a significantly higher reduction in mosquito Aedes aegypti populations in the AGO (mean ± SE) (1.3 ± 1.7) and In2Care (4.9 ± 4.6) sites (X2= 20.13, P < 0.0001) post trap deployment, compared to pre-trap deployment. By week 8, the recovery rate of mosquito populations was highest in the In2Care trap site, followed by the AGO site. This result suggests that AGO traps were more effective than In2Care traps in reducing Ae. aegypti mosquito populations. For Ae. albopictus, the In2Care site had 100% reduction, and this was higher than the AGO site.
Mosquito Control programs are utilizing cost-effective long term autocidal gravid traps because they minimize labor needs while targeting the gravid population of container-breeding mosquitoes. This field study compared the efficacy of the In2Care Mosquito Trap and the Centers for Disease Control and Prevention autocidal gravid ovitrap (CDC-AGO). The study consisted of two control and two treatment sites, and each treatment site had either 100 In2Care Mosquito Traps or 100 CDC-AGOs. Aedes aegypti populations in each site were monitored using Biogent (BG) Sentinel 2 mosquito traps and ovitraps. Analysis of pre- and post-treatment data indicated no significant difference in adult mosquito populations detected by BG traps from either the In2Care or CDC-AGO sites. However, the mean number of eggs collected by ovitraps showed significant reduction in both trap type treated areas posttreatment, compared to pre-treatment. Furthermore, the mean number of egg collections from the In2Care mosquito trap treated area was much less than the collection from the CDC-AGO trap treated area post-treatment.
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