Inheritance of dicrotophos resistance in greenhouse whitefly

Amir D. Omer, Bruce E. Tabashnik, Marshall W. Johnson

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We studied inheritance of resistance to dicrotophos in greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera, Aleyrodidae). Compared with females from a field‐collected susceptible strains (S), females from a resistant strain (R) of T. vaporariorum derived from heavily treated cotton fields had a 28‐fold greater LC50 to dicrotophos in laboratory bioassays. Concentration‐mortality lines obtained from female progeny of reciprocal F1 crosses (R♀ XS♂ and S♀ XR♂) were similar, suggesting that inheritance of dicrotophos resistance was autosomal and not influenced by maternal effects. Responses of F1 female progeny were similar to those of the parental S strain, indicating that the resistance was partially recessive (degree of dominance, D, was −0.61). Mortality observed in female progeny obtained from a backcross (F1♀ XR♂) corresponded more closely to expectations derived from polygenic models than to expectations from a monogenic model. The estimated number of effective factors (sensu Lande, 1981) contributing equally to resistance was three. 1995 The Netherlands Entomological Society

Original languageEnglish (US)
Pages (from-to)177-181
Number of pages5
JournalEntomologia Experimentalis et Applicata
Issue number2
StatePublished - Nov 1995


  • Aleyrodidae
  • Homoptera
  • Trialeurodes vaporariorum
  • inheritance
  • insecticide resistance
  • organophosphate

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science


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