title: Insecticide resistance status in the whitefly, Bemisia tabaci genetic groups Asia-I, Asia-II-1 and Asia-II-7 on the Indian subcontinent.
abstract: The present study is a summary of the current level of the insecticide resistance to selected organophosphates, pyrethroids, and neonicotinoids in seven Indian field populations of Bemisia tabaci genetic groups Asia-I, Asia-II-1, and Asia-II-7. Susceptibility of these populations was varied with Asia-II-7 being the most susceptible, while Asia-I and Asia-II-1 populations were showing significant resistance to these insecticides. The variability of the LC50values was 7x for imidacloprid and thiamethoxam, 5x for monocrotophos and 3x for cypermethrin among the Asia-I, while, they were 7x for cypermethrin, 6x for deltamethrin and 5x for imidacloprid within the Asia-II-1 populations. When compared with the most susceptible, PUSA population (Asia-II-7), a substantial increase in resistant ratios was observed in both the populations of Asia-I and Asia-II-1. Comparative analysis during 2010-13 revealed a decline in susceptibility in Asia-I and Asia-II-1 populations of B. tabaci to the tested organophosphate, pyrethroid, and neonicotinoid insecticides. Evidence of potential control failure was detected using probit analysis estimates for cypermethrin, deltamethrin, monocrotophos and imidacloprid. Our results update resistance status of B. tabaci in India. The implications of insecticide resistance management of B. tabaci on Indian subcontinent are discussed.
authors.affiliation: Indian Agricultural Research Institute, Division of Entomology, New Delhi, 110012, India.|Banaras Hindu University, Department of Zoology, Varanasi, 221005, India.
authors.forename: N C
authors.initials: NC
authors.lastname: Naveen
authors.affiliation: Indian Agricultural Research Institute, Division of Entomology, New Delhi, 110012, India.
authors.forename: Rahul
authors.initials: R
authors.lastname: Chaubey
authors.affiliation: Banaras Hindu University, Department of Zoology, Varanasi, 221005, India.
authors.forename: Dinesh
authors.initials: D
authors.lastname: Kumar
authors.affiliation: University of Cambridge, Department of Physiology, Development and Neuroscience, Cambridge, CB2 3EG, United Kingdom.
authors.forename: K B
authors.initials: KB
authors.lastname: Rebijith
authors.affiliation: University of Delhi, Department of Zoology, Delhi, 110007, India.
authors.forename: Raman
authors.initials: R
authors.lastname: Rajagopal
authors.affiliation: Indian Agricultural Research Institute, Division of Entomology, New Delhi, 110012, India.
authors.forename: B
authors.initials: B
authors.lastname: Subrahmanyam
authors.affiliation: Indian Agricultural Research Institute, Division of Entomology, New Delhi, 110012, India.
authors.forename: S
authors.initials: S
authors.lastname: Subramanian
mesh_terms: D000818:Animals; D017344:Genes, Insect; D006430:Hemiptera / Q000187:drug effects* / Q000235:genetics* / Q000378:metabolism; D007194:India; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology*; D010710:Phosphates / Q000378:metabolism; D011722:Pyrethrins / Q000494:pharmacology
chemical_list: D007306:Insecticides; D010710:Phosphates; D011722:Pyrethrins