Pest management under climate change: The importance of understanding tritrophic relations

Plants and insects depend on climatic factors (temperature, solar radiation, precipitations, relative humidity and CO2) for their development. Current knowledge suggests that climate change can alter plants and insects development and affect their interactions. Shifts in tritrophic relations are of...

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Veröffentlicht in:The Science of the total environment 2018-03, Vol.616-617, p.397-407
Hauptverfasser: Castex, V., Beniston, M., Calanca, P., Fleury, D., Moreau, J.
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Sprache:eng
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Zusammenfassung:Plants and insects depend on climatic factors (temperature, solar radiation, precipitations, relative humidity and CO2) for their development. Current knowledge suggests that climate change can alter plants and insects development and affect their interactions. Shifts in tritrophic relations are of particular concern for Integrated Pest Management (IPM), because responses at the highest trophic level (natural enemies) are highly sensitive to warmer temperature. It is expected that natural enemies could benefit from better conditions for their development in northern latitudes and IPM could be facilitated by a longer period of overlap. This may not be the case in southern latitudes, where climate could become too warm. Adapting IPM to future climatic conditions requires therefore understanding of changes that occur at the various levels and their linkages. The aim of this review is to assess the current state of knowledge and highlights the gaps in the existing literature concerning how climate change can affect tritrophic relations. Because of the economic importance of wine production, the interactions between grapevine, Vitis vinifera (1st), Lobesia botrana (2nd) and Trichogramma spp., (3rd), an egg parasitoid of Lobesia botrana, are considered as a case study for addressing specific issues. In addition, we discuss models that could be applied in order quantify alterations in the synchrony or asynchrony patterns but also the shifts in the timing and spatial distribution of hosts, pests and their natural enemies. [Display omitted] •Climate change might affect trophic interactions in timing and distribution.•Warmer conditions will enhance shifts in plant and insect phenologies.•Voltinism might increase in warmer regions previously unsuitable.•Southern regions could become too warm in the future for optimal IPM.•Warming conditions may change the latitudinal distribution of insect pests.
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2017.11.027