The effect of the weaver ant, Oecophylla smaragdina (Hymenoptera

Formicidae), on the mango seed weevil, Sternochetus mangiferae (Coleoptera: Curculionidae), in mango orchards in the Northern Territory of Australia

Renkang Peng, Keith Christian

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The mango seed weevil, Sternochetus mangiferae (Fabricius), is one of the major mango insect pests in northern Australia. A reasonable level of control can be obtained with insecticide sprays together with orchard sanitation, but the only option available for organic growers is the latter. Weaver ants, Oecophylla smaragdina (Fabricius), are effective in controlling the main insect pests in citrus, cashew and mango orchards. To determine whether weaver ants, which are usually abundant in non-sprayed mango orchards, have the potential to control the mango seed weevil, field experiments together with regular monitoring programmes at six orchards in the Northern Territory of Australia were conducted from 2001 to 2003. Data from two conventional orchards showed that the treatment with weaver ants plus soft chemicals produced lower levels of downgraded fruits (<0.5%) compared to the treatment with chemical insecticides (1.4-2.1%). In three organic or insecticide-free orchards, fruits were much less damaged on trees with weaver ants (<1%) than on trees without the ants (2.5-15.7%). In the sixth orchard, that had much higher mango seed weevil populations than the others, levels of downgraded fruits were lower on trees with abundant weaver ants than on trees with fewer weaver ants. We conclude that weaver ants are efficient biocontrol agents of the mango seed weevil, and that for successful control of the pest it is important both to maintain the ants at high levels and to destroy excess fruits.
    Original languageEnglish
    Pages (from-to)15-24
    Number of pages10
    JournalInternational Journal of Pest Management
    Volume53
    Issue number1
    Publication statusPublished - 2007

    Fingerprint

    Cryptorhynchus mangiferae
    Oecophylla smaragdina
    Northern Territory
    mangoes
    Curculionidae
    Formicidae
    orchards
    Hymenoptera
    Coleoptera
    fruits
    insecticides
    insect pests
    cashew fruit
    sanitation
    pest control
    biological control agents
    Citrus
    growers

    Cite this

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    title = "The effect of the weaver ant, Oecophylla smaragdina (Hymenoptera: Formicidae), on the mango seed weevil, Sternochetus mangiferae (Coleoptera: Curculionidae), in mango orchards in the Northern Territory of Australia",
    abstract = "The mango seed weevil, Sternochetus mangiferae (Fabricius), is one of the major mango insect pests in northern Australia. A reasonable level of control can be obtained with insecticide sprays together with orchard sanitation, but the only option available for organic growers is the latter. Weaver ants, Oecophylla smaragdina (Fabricius), are effective in controlling the main insect pests in citrus, cashew and mango orchards. To determine whether weaver ants, which are usually abundant in non-sprayed mango orchards, have the potential to control the mango seed weevil, field experiments together with regular monitoring programmes at six orchards in the Northern Territory of Australia were conducted from 2001 to 2003. Data from two conventional orchards showed that the treatment with weaver ants plus soft chemicals produced lower levels of downgraded fruits (<0.5{\%}) compared to the treatment with chemical insecticides (1.4-2.1{\%}). In three organic or insecticide-free orchards, fruits were much less damaged on trees with weaver ants (<1{\%}) than on trees without the ants (2.5-15.7{\%}). In the sixth orchard, that had much higher mango seed weevil populations than the others, levels of downgraded fruits were lower on trees with abundant weaver ants than on trees with fewer weaver ants. We conclude that weaver ants are efficient biocontrol agents of the mango seed weevil, and that for successful control of the pest it is important both to maintain the ants at high levels and to destroy excess fruits.",
    keywords = "ant, biocontrol agent, insecticide, orchard, pest control, seed, Australasia, Australia, Anacardium occidentale, Bruchinae, Citrus, Coleoptera, Curculionidae, Formicidae, Hymenoptera, Insecta, Mangifera indica, Oecophylla smaragdina, Oecophyllini, Sternochetus mangiferae",
    author = "Renkang Peng and Keith Christian",
    year = "2007",
    language = "English",
    volume = "53",
    pages = "15--24",
    journal = "International Journal of Pest Management",
    issn = "0030-7793",
    publisher = "Taylor & Francis",
    number = "1",

    }

    TY - JOUR

    T1 - The effect of the weaver ant, Oecophylla smaragdina (Hymenoptera

    T2 - Formicidae), on the mango seed weevil, Sternochetus mangiferae (Coleoptera: Curculionidae), in mango orchards in the Northern Territory of Australia

    AU - Peng, Renkang

    AU - Christian, Keith

    PY - 2007

    Y1 - 2007

    N2 - The mango seed weevil, Sternochetus mangiferae (Fabricius), is one of the major mango insect pests in northern Australia. A reasonable level of control can be obtained with insecticide sprays together with orchard sanitation, but the only option available for organic growers is the latter. Weaver ants, Oecophylla smaragdina (Fabricius), are effective in controlling the main insect pests in citrus, cashew and mango orchards. To determine whether weaver ants, which are usually abundant in non-sprayed mango orchards, have the potential to control the mango seed weevil, field experiments together with regular monitoring programmes at six orchards in the Northern Territory of Australia were conducted from 2001 to 2003. Data from two conventional orchards showed that the treatment with weaver ants plus soft chemicals produced lower levels of downgraded fruits (<0.5%) compared to the treatment with chemical insecticides (1.4-2.1%). In three organic or insecticide-free orchards, fruits were much less damaged on trees with weaver ants (<1%) than on trees without the ants (2.5-15.7%). In the sixth orchard, that had much higher mango seed weevil populations than the others, levels of downgraded fruits were lower on trees with abundant weaver ants than on trees with fewer weaver ants. We conclude that weaver ants are efficient biocontrol agents of the mango seed weevil, and that for successful control of the pest it is important both to maintain the ants at high levels and to destroy excess fruits.

    AB - The mango seed weevil, Sternochetus mangiferae (Fabricius), is one of the major mango insect pests in northern Australia. A reasonable level of control can be obtained with insecticide sprays together with orchard sanitation, but the only option available for organic growers is the latter. Weaver ants, Oecophylla smaragdina (Fabricius), are effective in controlling the main insect pests in citrus, cashew and mango orchards. To determine whether weaver ants, which are usually abundant in non-sprayed mango orchards, have the potential to control the mango seed weevil, field experiments together with regular monitoring programmes at six orchards in the Northern Territory of Australia were conducted from 2001 to 2003. Data from two conventional orchards showed that the treatment with weaver ants plus soft chemicals produced lower levels of downgraded fruits (<0.5%) compared to the treatment with chemical insecticides (1.4-2.1%). In three organic or insecticide-free orchards, fruits were much less damaged on trees with weaver ants (<1%) than on trees without the ants (2.5-15.7%). In the sixth orchard, that had much higher mango seed weevil populations than the others, levels of downgraded fruits were lower on trees with abundant weaver ants than on trees with fewer weaver ants. We conclude that weaver ants are efficient biocontrol agents of the mango seed weevil, and that for successful control of the pest it is important both to maintain the ants at high levels and to destroy excess fruits.

    KW - ant

    KW - biocontrol agent

    KW - insecticide

    KW - orchard

    KW - pest control

    KW - seed

    KW - Australasia

    KW - Australia

    KW - Anacardium occidentale

    KW - Bruchinae

    KW - Citrus

    KW - Coleoptera

    KW - Curculionidae

    KW - Formicidae

    KW - Hymenoptera

    KW - Insecta

    KW - Mangifera indica

    KW - Oecophylla smaragdina

    KW - Oecophyllini

    KW - Sternochetus mangiferae

    M3 - Article

    VL - 53

    SP - 15

    EP - 24

    JO - International Journal of Pest Management

    JF - International Journal of Pest Management

    SN - 0030-7793

    IS - 1

    ER -