Application of Sequential Classification of Prey/Predator Ratio Test to Tetranychus urticae and Phytoseiulus persimilis System in Greenhouse Roses

Jung Joon Park, Heungsun Park, Yong Heon Kim, Kijong Cho

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A sequential sampling procedure for classifying the ratio of prey/predators developed by Nyrop (1988) was examined to implement for a biological control in the greenhouse roses. The procedure was combined with a sequential density classification procedure for use in monitoring a phytophagous mite, Tetranychus urticae Koch, and a phytoseiid predator, Phytoseiulus persimilis Athias-Henriot. This procedure was required four parameters: Means and variances for T. urticae and P. persimilis, correlation coefficient between densities of prey and predator and critical ratio of prey and predator. The parameter values used in this study were 0.725 for the correlation coefficient and 10 for the critical ratio. The variances for each species were estimated using a Taylor's power law model. The procedure is proven to be successfully applicable to T. urticae and P. persimilis system in greenhouse roses at two action threshold levels of 5 and 10 T. urticae per three-leaflet leave. The limitations and implementation of this procedure is also discussed.

Original languageEnglish
Pages (from-to)121-126
Number of pages6
JournalJournal of Asia-Pacific Entomology
Volume3
Issue number2
DOIs
Publication statusPublished - 2000 Sep

Keywords

  • Acari
  • Integrated mite control
  • Prey/predator ratio
  • Sampling
  • Two-spotted spider mite

ASJC Scopus subject areas

  • Insect Science

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