Genotype and temperature influence pea aphid resistance to a fungal entomopathogen

David A. Stacey, Matthew Brian Thomas, Simon Blanford, Judith K. Pell, Clare Pugh, Mark D.E. Fellowes

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The influence of temperature on life history traits of four Acyrthosiphon pisum clones was investigated, together with their resistance to one genotype of the fungal entomopathogen Erynia neoaphidis. There was no difference among aphid clones in development rate, but they did differ in fecundity. Both development rate and fecundity were influenced by temperature, but all clones showed similar responses to the changes in temperature (i.e. the interaction term was nonsignificant). However, there were significant differences among clones in susceptibility to the pathogen, and this was influenced by temperature. Furthermore, the clones differed in how temperature influenced susceptibility, with susceptibility rankings changing with temperature. Two clones showed changes in susceptibility which mirrored changes in the in vitro vegetative growth rate of E. neoaphidis at different temperatures, whereas two other clones differed considerably from this expected response. Such interactions between genotype and temperature may help maintain heritable variation in aphid susceptibility to fungal pathogen attack and have implications for our understanding of disease dynamics in natural populations. This study also highlights the difficulties of drawing conclusions about the efficacy of a biological control agent when only a restricted range of pest genotypes or environmental conditions are considered.

Original languageEnglish (US)
Pages (from-to)75-81
Number of pages7
JournalPhysiological Entomology
Volume28
Issue number2
DOIs
StatePublished - Jun 1 2003

Fingerprint

Aphids
entomopathogens
Acyrthosiphon pisum
Peas
aphid
genotype
clone
Genotype
Clone Cells
clones
Temperature
temperature
Erynia neoaphidis
Fertility
fecundity
Aphidoidea
pathogen
Biological Control Agents
pathogens
life history trait

All Science Journal Classification (ASJC) codes

  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

Cite this

Stacey, David A. ; Thomas, Matthew Brian ; Blanford, Simon ; Pell, Judith K. ; Pugh, Clare ; Fellowes, Mark D.E. / Genotype and temperature influence pea aphid resistance to a fungal entomopathogen. In: Physiological Entomology. 2003 ; Vol. 28, No. 2. pp. 75-81.
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Genotype and temperature influence pea aphid resistance to a fungal entomopathogen. / Stacey, David A.; Thomas, Matthew Brian; Blanford, Simon; Pell, Judith K.; Pugh, Clare; Fellowes, Mark D.E.

In: Physiological Entomology, Vol. 28, No. 2, 01.06.2003, p. 75-81.

Research output: Contribution to journalArticle

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