Control of Aedes albopictus Mosquito Larvae with Carpesium abrotanoides L

As a vital vector of dengue fever, yellow fever, and other mosquito-borne diseases, Aedes albopictus (Diptera: Culicidae) can be broadly distributed worldwide and cause a severe threat to public health. To date, considering the fast-emerging insecticide resistance in the mosquito, the development of new botanical insecticides to control and reduce Ae. albopictus is urgent and crucial. Therefore, to investigate the decoction effect of the plant C. abrotanoides L. on mosquito larvae killing, we detected the mortality of larvae after treatment with different concentrations (60 mg/mL, 120 mg/mL, and 180 mg/mL) of decoction within a series of time points (12 h, 24 h, 36 h, and 48 h). We found that 24 h with 180 mg/mL C. abrotanoides L. decoction treatment killed 92.35% of mosquitoes relative to the control treatment. Meanwhile, 36 h with 120 mg/mL could also kill more than 90% of mosquitoes. Furthermore, Carassius auratus populations were exposed to 120 mg/mL C. abrotanoides L. decoction for 36 h and were not dead. The mortality evaluation indicated that this concentration is not a harmful level of ecological environmental pollution. This study provides a possible plant candidate that could be used for designing plant-derived insecticides. Additionally, these methods can be altered and applied to other mosquito species.