Performance and host-plant preference of two insect biological control agents on moisture stressed broom, Cytisus scoparius

K. Galway, Richard Duncan, R. Emberson, Andrew Sheppard, P. Syrett

    Research output: Contribution to journalArticle

    Abstract

    Glasshouse experiments were conducted to test the hypothesis that two broom (Cytisus scoparius) biological control agents perform better on, and prefer, broom that is growing vigorously. Insect performance and preference were assessed on host-plants subject to four moisture treatments for three months prior, and for the 12 month duration of the experiment. All measures of plant growth showed that broom grew most vigorously under moderate soil moisture treatments. Arytainilla spartiophila females avoided ovipositing on plants grown under saturated conditions, but showed no preference between other treatments. Performance (e.g. oviposition rate) was signifi cantly higher on broom growing under moderate moisture than in saturated soil or at the lowest soil moisture content. For Leucoptera spartifoliella, preference (which treatment was selected when given a choice) was related to survival and pupal abundance, but not to oviposition performance. Results offer only partial support for the Plant Vigour Hypothesis that insects closely associated with their host-plant perform best on vigorously growing hosts, but tend to support the hypothesis that host-plant preference is related to performance of offspring for monophagous insects with immobile juvenile stages. With either agent present, several plant-growth parameters were reduced. This, combined with the ability of female insects to avoid unsuitable (less vigorous) host plants, confi rms that the two insects are potentially effective control agents.
    Original languageEnglish
    Pages (from-to)55-61
    Number of pages7
    JournalPlant Protection Quarterly
    Volume24
    Publication statusPublished - 2009

    Fingerprint

    Cytisus scoparius
    biological control
    host plant
    biological control agents
    host plants
    moisture
    insect
    insects
    oviposition
    soil moisture
    Leucoptera
    plant growth
    saturated conditions
    vigor
    soil water content
    moisture content
    experiment
    soil water
    greenhouses
    duration

    Cite this

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    title = "Performance and host-plant preference of two insect biological control agents on moisture stressed broom, Cytisus scoparius",
    abstract = "Glasshouse experiments were conducted to test the hypothesis that two broom (Cytisus scoparius) biological control agents perform better on, and prefer, broom that is growing vigorously. Insect performance and preference were assessed on host-plants subject to four moisture treatments for three months prior, and for the 12 month duration of the experiment. All measures of plant growth showed that broom grew most vigorously under moderate soil moisture treatments. Arytainilla spartiophila females avoided ovipositing on plants grown under saturated conditions, but showed no preference between other treatments. Performance (e.g. oviposition rate) was signifi cantly higher on broom growing under moderate moisture than in saturated soil or at the lowest soil moisture content. For Leucoptera spartifoliella, preference (which treatment was selected when given a choice) was related to survival and pupal abundance, but not to oviposition performance. Results offer only partial support for the Plant Vigour Hypothesis that insects closely associated with their host-plant perform best on vigorously growing hosts, but tend to support the hypothesis that host-plant preference is related to performance of offspring for monophagous insects with immobile juvenile stages. With either agent present, several plant-growth parameters were reduced. This, combined with the ability of female insects to avoid unsuitable (less vigorous) host plants, confi rms that the two insects are potentially effective control agents.",
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    year = "2009",
    language = "English",
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    pages = "55--61",
    journal = "Plant Protection Quarterly",
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    Performance and host-plant preference of two insect biological control agents on moisture stressed broom, Cytisus scoparius. / Galway, K.; Duncan, Richard; Emberson, R.; Sheppard, Andrew; Syrett, P.

    In: Plant Protection Quarterly, Vol. 24, 2009, p. 55-61.

    Research output: Contribution to journalArticle

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    AU - Duncan, Richard

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    AU - Syrett, P.

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