Emission of volatile organic compounds by apple trees under spider mite attack and attraction of predatory mites

J. Llusià, J. Peñuelas

    Research output: Contribution to journalArticleResearchpeer-review

    35 Citations (Scopus)

    Abstract

    Emission rates of volatile organic compounds (VOCs) from Pirus malus L. subsp. mitis (Wallr.) var. Golden Delicious and var. Starking attacked by the phytophagous mite Panonychus ulmi Koch, and their attractiveness to the predatory mites Amblyseius andersoni Chant and Amblyseius californicus McGregor, were studied during three years. A large variability was found in the emission of individual VOCs depending on the infestation, the apple tree variety and the date. There were larger total VOC emission rates and larger total VOC leaf concentrations in apple trees attacked by phytophagous mites, especially in the var. Starking. In infested trees of this variety, there were also more predatory mites. An olfactometer assay showed that predatory mites preferentially chose branches infested by Panonychus ulmi (85% went to infested branches vs 15% to uninfested control branches) indicating that volatiles may be used as cues to find their prey.
    Original languageEnglish
    Pages (from-to)65-77
    JournalExperimental and Applied Acarology
    Volume25
    Issue number1
    DOIs
    Publication statusPublished - 23 Jul 2001

    Keywords

    • Amblyseius andersoni
    • Amblyseius californicus
    • Panonychus ulmi
    • Phytophagous mites
    • Predatory mites
    • VOC emission

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