Development of a mite bioassay to evaluate plant resistance and its use in determining regeneration of spider mite resistance

J. Harman, P. Paul, R. Craig, D. Cox-Foster, J. Medford, R. O. Mumma

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The zonal geranium (Pelargonium xhortorum) possesses tall glandular trichomes that secrete anacardic acids, a viscous, sticky exudate which has been suggested as the primary mechanism in two-spotted spider mite (Tetranychus urticae Koch) resistance. A new bioassay was developed using small Plexiglas® cylinders as chambers for evaluating the resistance of geranium leaves to the two-spotted spider mite. This bioassay was easy to prepare, required only 24 hours to conduct, exhibited no problems with desiccation, condensation, or mite accountability, and yielded reproducible results. This bioassay was then used to study the regeneration of resistance of attached geranium leaves after they were made mite-susceptible by removing the excreted anacardic acids with water. Washed leaves regained full resistance after 14 days.

Original languageEnglish (US)
Pages (from-to)301-305
Number of pages5
JournalEntomologia Experimentalis et Applicata
Volume81
Issue number3
DOIs
StatePublished - Jan 1 1996

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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