Implications of cypermethrin exposure on population dynamics and fitness traits of laboratory-selected resistant and susceptible populations of Spodoptera litura (Fabricius)

被引：1
|
作者：
Mahajan, Arushi [1 ]
Devi, Meena [1 ]
Saini, Harvinder Singh [2 ]
Kaur, Sanehdeep [1 ]
机构：
[1] Department of Zoology, Guru Nanak Dev University, Punjab, Amritsar, India
[2] Department of Microbiology, Guru Nanak Dev University, Punjab, Amritsar, India
来源：
Chemosphere | 2024年 / 364卷
关键词：
The tobacco cutworm; Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae) is an economically important agricultural polyphagous pest worldwide. It has shown high resistance to several insecticides; including cypermethrin; a synthetic pyrethroid that is used in large-scale commercial agricultural applications. The present study investigated the development of selection-induced resistance to cypermethrin and associated fitness costs in S. litura. After continuous exposure to cypermethrin for consecutive fifteen generations; the cypermethrin-selected population (CYP-Sel) of S. litura developed a 21.2-fold resistance. The CYP-Sel strain had a relative fitness of 0.16 when treated with LC50; prolonged larval duration; and development time. Meanwhile; the strain also showed shorter adult duration; lower fecundity; and hatchability compared with the Unsel-Lab population. CYP-Sel population showed a significant disadvantage in intrinsic rate of natural increase (rm); net reproductive rate (Ro); and finite rate of increase (λ) when compared to the Unsel-Lab population. This knowledge could help to design resistance management strategies against this particular pest; along with potential management strategies to overcome the development of resistance. © 2024 Elsevier Ltd;
D O I：
10.1016/j.chemosphere.2024.143186
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