Field evaluation of resistance to pyriproxyfen in Bemisia tabaci (R Riotype)

David W. Crowder, Timothy J. Dennehy, Christa Ellers-Kirk, Christine M. Yafuso, Peter C Ellsworth, Bruce E Tabashnik, Yves Carriere

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

We determined effects of aerial sprays of the insect growth regulator pyriproxyfen on sweetpotato whitefly, Bemisia tabaci (Gennadius) (B biotype), in Arizona cotton (Gossypium spp.) fields. We measured survival for males and females from a susceptible strain and a laboratory-selected resistant strain, as well as for hybrid female progeny from crosses between the strains. Insects were exposed directly to pyriproxyfen sprays in the field or indirectly in the laboratory by rearing them on sprayed leaves collected from the field. In all tests, survival was higher for the resistant strain than the susceptible strain, but did not differ between sexes in each strain. Survival to the adult stage did not differ between eggs and nymphs directly exposed to sprays. For susceptible and hybrid individuals, survival was lower on leaves collected the day of spraying than on leaves collected 2 wk after spraying. In contrast, survival of resistant individuals did not differ based on the timing of exposure. Dominance of resistance to pyriproxyfen depended on the type of exposure. Resistance was partially or completely dominant in direct exposure bioassays and on leaves collected 2 wk after spraying (h > 0.6). Resistance was partially recessive on leaves collected the day of spraying (mean h = 0.34). Rapid evolution of resistance to pyriproxyfen could occur if individuals in field populations with traits similar to those of the laboratory-selected strain examined here were treated intensively with this insecticide.

Original languageEnglish (US)
Pages (from-to)1650-1656
Number of pages7
JournalJournal of Economic Entomology
Volume100
Issue number5
DOIs
StatePublished - Oct 2007

Fingerprint

pyriproxyfen
Bemisia tabaci
spray
spraying
leaves
insect
whitefly
biotype
growth regulator
rearing
insecticide
Gossypium
Bemisia argentifolii
insect growth regulators
cotton
bioassay
direct contact
evaluation
egg
dominance (genetics)

Keywords

  • Bemisia tabaci
  • Genetics
  • Haplodiploid
  • Insecticide resistance
  • Pyriproxyfen

ASJC Scopus subject areas

  • Insect Science

Cite this

Field evaluation of resistance to pyriproxyfen in Bemisia tabaci (R Riotype). / Crowder, David W.; Dennehy, Timothy J.; Ellers-Kirk, Christa; Yafuso, Christine M.; Ellsworth, Peter C; Tabashnik, Bruce E; Carriere, Yves.

In: Journal of Economic Entomology, Vol. 100, No. 5, 10.2007, p. 1650-1656.

Research output: Contribution to journalArticle

Crowder, David W. ; Dennehy, Timothy J. ; Ellers-Kirk, Christa ; Yafuso, Christine M. ; Ellsworth, Peter C ; Tabashnik, Bruce E ; Carriere, Yves. / Field evaluation of resistance to pyriproxyfen in Bemisia tabaci (R Riotype). In: Journal of Economic Entomology. 2007 ; Vol. 100, No. 5. pp. 1650-1656.
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