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<p>Mosquitoes cause serious vector-borne human diseases. <i>Aedes aegypti</i> (L) and <i>Aedes albopictus</i> (Skuse) are potential vectors for dengue, chikungunya, yellow fever, and Zika. In India, an average of 0.17 million dengue and 0.11 million suspected chikungunya cases were reported annually from 2017 to 2024. The study examines the susceptibility of the local populations of the two mosquito species for alphacypermethrin (0.05%), deltamethrin (0.05%), permethrin (0.75%), DDT (4%), and temephos (0.02&#xa0;mg/L) in the southern districts of Rajasthan, India as these areas experience proliferation of mosquito-borne diseases in recent years. Results suggested populations of both the mosquito species are resistant to DDT but susceptible to deltamethrin and alphacypermethrin. For permethrin, seven populations of <i>A. aegypti</i> were found unconfirmed resistant, with mortality between 94.74 and 97%, and the remaining eleven populations were found susceptible. <i>A. albopictus</i> was found susceptible to permethrin in all populations. Larvae of both species were found susceptible to temephos (0.02&#xa0;mg/L). For <i>A. aegypti</i>, deltamethrin and alphacypermethrin treatments registered minimum KDT<sub>50</sub> (18.35&#xa0;min) and KDT<sub>95</sub> (37.5&#xa0;min) respectively, whereas permethrin registered maximum KDT<sub>50</sub> (37.11&#xa0;min) and KDT<sub>95</sub> (89.73&#xa0;min) among the pyrethroids. In case of DDT, KDT<sub>50</sub> and KDT<sub>95</sub> varied from 72.6–133.8&#xa0;min and 145.9–630.3&#xa0;min, respectively. For <i>A. albopictus</i>, deltamethrin treatments registered minimum KDT<sub>50</sub> (11.7&#xa0;min) and KDT<sub>95</sub> (23.34&#xa0;min), whereas permethrin registered maximum KDT<sub>50</sub> (16.99&#xa0;min) and KDT<sub>95</sub> (41.36&#xa0;min). DDT-treated <i>A. albopictus</i> showed KDT<sub>50</sub> and KDT<sub>95</sub> as 57.64–83.72&#xa0;min and 100.48–255.01&#xa0;min, respectively. Alphacypermethrin and deltamethrin hold promise as adulticides and temephos as larvicides at a minimal concentration in critical disease outbreaks in the study area while DDT should be avoided.</p>

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Susceptibility of Aedes aegypti and Aedes albopictus Mosquitoes to Organochlorine, Organophosphate, and Pyrethroid-Based Insecticides in Rajasthan, India

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Pradeep Kumar Jangir,
  • Arti Prasad

摘要

Mosquitoes cause serious vector-borne human diseases. Aedes aegypti (L) and Aedes albopictus (Skuse) are potential vectors for dengue, chikungunya, yellow fever, and Zika. In India, an average of 0.17 million dengue and 0.11 million suspected chikungunya cases were reported annually from 2017 to 2024. The study examines the susceptibility of the local populations of the two mosquito species for alphacypermethrin (0.05%), deltamethrin (0.05%), permethrin (0.75%), DDT (4%), and temephos (0.02 mg/L) in the southern districts of Rajasthan, India as these areas experience proliferation of mosquito-borne diseases in recent years. Results suggested populations of both the mosquito species are resistant to DDT but susceptible to deltamethrin and alphacypermethrin. For permethrin, seven populations of A. aegypti were found unconfirmed resistant, with mortality between 94.74 and 97%, and the remaining eleven populations were found susceptible. A. albopictus was found susceptible to permethrin in all populations. Larvae of both species were found susceptible to temephos (0.02 mg/L). For A. aegypti, deltamethrin and alphacypermethrin treatments registered minimum KDT50 (18.35 min) and KDT95 (37.5 min) respectively, whereas permethrin registered maximum KDT50 (37.11 min) and KDT95 (89.73 min) among the pyrethroids. In case of DDT, KDT50 and KDT95 varied from 72.6–133.8 min and 145.9–630.3 min, respectively. For A. albopictus, deltamethrin treatments registered minimum KDT50 (11.7 min) and KDT95 (23.34 min), whereas permethrin registered maximum KDT50 (16.99 min) and KDT95 (41.36 min). DDT-treated A. albopictus showed KDT50 and KDT95 as 57.64–83.72 min and 100.48–255.01 min, respectively. Alphacypermethrin and deltamethrin hold promise as adulticides and temephos as larvicides at a minimal concentration in critical disease outbreaks in the study area while DDT should be avoided.