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Estimating the landscape distribution of eggs by Helicoverpa spp., with implications for Bt resistance management

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  • Parry, H.R.
  • Paull, C.A.
  • Zalucki, M.P.
  • Ives, A.R.
  • Hulthen, A.
  • Schellhorn, N.A.

Abstract

Transgenic crops expressing insecticidal toxins of Bacillus thuringiensis (Bt) have been deployed in agricultural landscapes around the globe. While the key strategy to delay resistance is the mandatory planting of a non-Bt refuge crop that is preferred by the target pest, the efficacy of this resistance management strategy across different landscape contexts over time is rarely considered. Here, we develop an individual-based model to simulate the spatio-temporal distribution of a highly mobile, polyphagous, global pest, Helicoverpa spp, across agricultural landscapes dominated by transgenic cotton. The simulation model allows us to explore refuge ‘electivity’, the relative utilization of refuge habitat by female Helicoverpa, in relation to Bt cotton habitat. Refuge electivity is an emergent function of egg distributions resulting from individual moth behavior, within multiple landscapes during different seasons and crop phenology.

Suggested Citation

  • Parry, H.R. & Paull, C.A. & Zalucki, M.P. & Ives, A.R. & Hulthen, A. & Schellhorn, N.A., 2017. "Estimating the landscape distribution of eggs by Helicoverpa spp., with implications for Bt resistance management," Ecological Modelling, Elsevier, vol. 365(C), pages 129-140.
    • Handle: RePEc:eee:ecomod:v:365:y:2017:i:c:p:129-140
    DOI: 10.1016/j.ecolmodel.2017.10.004
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    Cited by:

    1. Grant, Tyler J. & Parry, Hazel R. & Zalucki, Myron P. & Bradbury, Steven P., 2018. "Predicting monarch butterfly (Danaus plexippus) movement and egg-laying with a spatially-explicit agent-based model: The role of monarch perceptual range and spatial memory," Ecological Modelling, Elsevier, vol. 374(C), pages 37-50.
    2. Yonow, Tania & Kriticos, Darren J. & Zalucki, Myron P. & Mc Donnell, Rory J. & Caron, Valerie, 2023. "Population modelling for pest management: A case study using a pest land snail and its fly parasitoid in Australia," Ecological Modelling, Elsevier, vol. 482(C).

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