| Summary: | Introduction: This paper aimed to examine the efficacy of Carica papaya seed extract (PSE) as the oral toxin component in two attractive toxic sugar bait (ATSB) formulations on the mortality of female Aedes aegypti and Aedes albopictus in a laboratory setting. Methods: Toxicity bioassays were conducted to determine the PSE concentration needed in ATSB formulations by exposing female Ae. aegypti and Ae. albopictus to seven different PSE concentrations for 72 hours. Probit analysis, conducted at 24-hour intervals, provided the median lethal concentration (LC) required to kill 50% and 90% of both mosquito populations; LC50 and LC90, respectively. In two separate cages, both populations of Ae. aegypti and Ae. albopictus female mosquitoes were exposed to ATSB A and ATSB B for 72 hours to determine the mortality rate. Results: The efficacy of 1% PSE was measured by comparing the mortality rates of ATSB A and ATSB B against a control population. After 72 hours of exposure, the results indicated that the Ae. aegypti mortality rate was significantly higher in ATSB A (82.50±3.2%) and ATSB B (80.00±2.0%) but there was no significant difference between Ae. albopictus mortality rates in ATSB A (90.00±2.0%) and the control group. However, the Ae. albopictus mortality rate was found to be significantly higher in ATSB B (96.25±2.4%). Conclusion: The study concluded that, the addition of 1% PSE increase mortality rates in both Aedes species, especially in the Ae. albopictus population. © 2021 UPM Press. All rights reserved.
|
|---|