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Predation pressure in Ugandan cotton fields measured by a sentinel prey method.

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Title: Predation pressure in Ugandan cotton fields measured by a sentinel prey method.
Authors: Howe, Andy G., Nachman, Gösta, Lövei, Gábor L.
Source: Entomologia Experimentalis et Applicata. Feb2015, Vol. 154 Issue 2, p161-170. 10p.
Subjects: Cotton diseases & pests, Predation, Pests, Ecosystems, Agricultural ecology, Arthropoda
Abstract: Pest suppression by natural enemies is an important ecosystem service, which is a valuable resource to poor smallholders in developing countries. Diverse natural enemy assemblages of arthropod predators and parasitoids are documented in various regions in Africa, but our knowledge of their impact on herbivores in agroecosystems remains limited. We conducted experiments in cotton, Gossypium hirsutum L. ( Malvaceae), under typical local agronomic practices in Uganda to assess levels of predation pressure ascribed to natural enemies. We measured predation rates on artificial caterpillars made of plasticine glued to cotton plants. Predation pressure on cotton fields varied between 1.96 and 4.1% per day, but was not significantly influenced by cotton treatments (insecticide/no insecticide, monocropping/intercropping with Phaseolus spp.). Predation pressure in non-crop habitats adjacent to cotton fields was up to 12× higher than in the fields. Marks left on the artificial caterpillars revealed that arthropods and birds were largely accountable for predation in cotton fields, whereas arthropods and small mammals were dominant in non-cultivated habitats. [ABSTRACT FROM AUTHOR]
Copyright of Entomologia Experimentalis et Applicata is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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DbLabel: Psychology and Behavioral Sciences Collection
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PubType: Academic Journal
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  Data: Predation pressure in Ugandan cotton fields measured by a sentinel prey method.
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  Data: <searchLink fieldCode="AR" term="%22Howe%2C+Andy+G%2E%22">Howe, Andy G.</searchLink><br /><searchLink fieldCode="AR" term="%22Nachman%2C+Gösta%22">Nachman, Gösta</searchLink><br /><searchLink fieldCode="AR" term="%22Lövei%2C+Gábor+L%2E%22">Lövei, Gábor L.</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Cotton+diseases+%26+pests%22">Cotton diseases & pests</searchLink><br /><searchLink fieldCode="DE" term="%22Predation%22">Predation</searchLink><br /><searchLink fieldCode="DE" term="%22Pests%22">Pests</searchLink><br /><searchLink fieldCode="DE" term="%22Ecosystems%22">Ecosystems</searchLink><br /><searchLink fieldCode="DE" term="%22Agricultural+ecology%22">Agricultural ecology</searchLink><br /><searchLink fieldCode="DE" term="%22Arthropoda%22">Arthropoda</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Pest suppression by natural enemies is an important ecosystem service, which is a valuable resource to poor smallholders in developing countries. Diverse natural enemy assemblages of arthropod predators and parasitoids are documented in various regions in Africa, but our knowledge of their impact on herbivores in agroecosystems remains limited. We conducted experiments in cotton, Gossypium hirsutum L. ( Malvaceae), under typical local agronomic practices in Uganda to assess levels of predation pressure ascribed to natural enemies. We measured predation rates on artificial caterpillars made of plasticine glued to cotton plants. Predation pressure on cotton fields varied between 1.96 and 4.1% per day, but was not significantly influenced by cotton treatments (insecticide/no insecticide, monocropping/intercropping with Phaseolus spp.). Predation pressure in non-crop habitats adjacent to cotton fields was up to 12× higher than in the fields. Marks left on the artificial caterpillars revealed that arthropods and birds were largely accountable for predation in cotton fields, whereas arthropods and small mammals were dominant in non-cultivated habitats. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Entomologia Experimentalis et Applicata is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/eea.12267
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 161
    Subjects:
      – SubjectFull: Cotton diseases & pests
        Type: general
      – SubjectFull: Predation
        Type: general
      – SubjectFull: Pests
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      – SubjectFull: Ecosystems
        Type: general
      – SubjectFull: Agricultural ecology
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      – SubjectFull: Arthropoda
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      – TitleFull: Predation pressure in Ugandan cotton fields measured by a sentinel prey method.
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            NameFull: Lövei, Gábor L.
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              Text: Feb2015
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