Control threshold analysis for the tea mosquito bug, helopeltis pernicialis (hemiptera: Miridae) and preliminary results concerning the efficiency of control by the green ant, oecophylla smaragdina (hymenoptera: Formicidae) in northern australia

R.K. Peng, K. Christian, K. Gibb

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Helopeltis pernicialis damage to a cashew crop was very serious in each of two years, resulting in no harvest unless the trees were protected either by pesticides or biological control agents. A control threshold was determined by a combination of the net income from increased yield and the frequency of insecticide use. A damage level of 1- 5% achieved the highest net profit. A damage level of 6- 10% resulted in yield that was over 73% of the yield of the 1- 5% damage level, but required one third less pesticide application. Therefore, it appears that 6- 10% damage level can be regarded as a control threshold for H. pernicialis. The pre-flowering flush appeared to be the most appropriate time to carry out the monitoring and spray programme to control H. pernicialis. Preliminary results showed that at the time when H. pernicialis caused serious damage to a tree without O. smaragdina nests, a tree with a constant ant population was only slightly damaged, andthe damage level never exceeded the control threshold of 6- 10%. It is suggested that O. smaragdina has high potential as a biological control agent.
    Original languageEnglish
    Pages (from-to)233-237
    Number of pages5
    JournalInternational Journal of Pest Management
    Volume43
    Issue number3
    DOIs
    Publication statusPublished - 1997

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    Helopeltis
    Helopeltis theivora
    Oecophylla smaragdina
    Miridae
    Hemiptera
    Formicidae
    Hymenoptera
    biological control agents
    pesticide application
    profits and margins
    income
    insecticides
    pesticides
    nests
    flowering
    monitoring
    crops

    Cite this

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    title = "Control threshold analysis for the tea mosquito bug, helopeltis pernicialis (hemiptera: Miridae) and preliminary results concerning the efficiency of control by the green ant, oecophylla smaragdina (hymenoptera: Formicidae) in northern australia",
    abstract = "Helopeltis pernicialis damage to a cashew crop was very serious in each of two years, resulting in no harvest unless the trees were protected either by pesticides or biological control agents. A control threshold was determined by a combination of the net income from increased yield and the frequency of insecticide use. A damage level of 1- 5{\%} achieved the highest net profit. A damage level of 6- 10{\%} resulted in yield that was over 73{\%} of the yield of the 1- 5{\%} damage level, but required one third less pesticide application. Therefore, it appears that 6- 10{\%} damage level can be regarded as a control threshold for H. pernicialis. The pre-flowering flush appeared to be the most appropriate time to carry out the monitoring and spray programme to control H. pernicialis. Preliminary results showed that at the time when H. pernicialis caused serious damage to a tree without O. smaragdina nests, a tree with a constant ant population was only slightly damaged, andthe damage level never exceeded the control threshold of 6- 10{\%}. It is suggested that O. smaragdina has high potential as a biological control agent.",
    keywords = "biological control, cashew, control threshold, green ant, tea mosquito bug, Australia, Formicidae, Helopeltis pernicialis, Hemiptera, Hymenoptera, Miridae, Oecophylla smaragdina",
    author = "R.K. Peng and K. Christian and K. Gibb",
    year = "1997",
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    language = "English",
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    journal = "International Journal of Pest Management",
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    T1 - Control threshold analysis for the tea mosquito bug, helopeltis pernicialis (hemiptera: Miridae) and preliminary results concerning the efficiency of control by the green ant, oecophylla smaragdina (hymenoptera: Formicidae) in northern australia

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    AU - Christian, K.

    AU - Gibb, K.

    PY - 1997

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    N2 - Helopeltis pernicialis damage to a cashew crop was very serious in each of two years, resulting in no harvest unless the trees were protected either by pesticides or biological control agents. A control threshold was determined by a combination of the net income from increased yield and the frequency of insecticide use. A damage level of 1- 5% achieved the highest net profit. A damage level of 6- 10% resulted in yield that was over 73% of the yield of the 1- 5% damage level, but required one third less pesticide application. Therefore, it appears that 6- 10% damage level can be regarded as a control threshold for H. pernicialis. The pre-flowering flush appeared to be the most appropriate time to carry out the monitoring and spray programme to control H. pernicialis. Preliminary results showed that at the time when H. pernicialis caused serious damage to a tree without O. smaragdina nests, a tree with a constant ant population was only slightly damaged, andthe damage level never exceeded the control threshold of 6- 10%. It is suggested that O. smaragdina has high potential as a biological control agent.

    AB - Helopeltis pernicialis damage to a cashew crop was very serious in each of two years, resulting in no harvest unless the trees were protected either by pesticides or biological control agents. A control threshold was determined by a combination of the net income from increased yield and the frequency of insecticide use. A damage level of 1- 5% achieved the highest net profit. A damage level of 6- 10% resulted in yield that was over 73% of the yield of the 1- 5% damage level, but required one third less pesticide application. Therefore, it appears that 6- 10% damage level can be regarded as a control threshold for H. pernicialis. The pre-flowering flush appeared to be the most appropriate time to carry out the monitoring and spray programme to control H. pernicialis. Preliminary results showed that at the time when H. pernicialis caused serious damage to a tree without O. smaragdina nests, a tree with a constant ant population was only slightly damaged, andthe damage level never exceeded the control threshold of 6- 10%. It is suggested that O. smaragdina has high potential as a biological control agent.

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    KW - Helopeltis pernicialis

    KW - Hemiptera

    KW - Hymenoptera

    KW - Miridae

    KW - Oecophylla smaragdina

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