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Climate change and insect pests: the global perspective 2 Cereal aphids 3 Vector-borne plant viruses 4 Hessian fl y and orange wheat blossom midge 5 Cereal leaf beetle, cotton bollworm and other pest species affecting wheat 6 Climate change effects on biological pest control in wheat systems 7 Other considerations: interaction of stress factors, extreme events and pest behaviour 8 Conclusions 9 Where to look for further information 10 Acknowledgements 11 References 1 Climate change and insect pests: the global perspective Historical trends and models suggest that sustained wheat production will be more diffi cult under projected climate change (Asseng et al., 2014; Challinor et al., 2014; Wilcox and Makowski, 2014). Unfortunately, these projections are limited in that they do not incorporate constraints on production from diseases, weeds and insect pests. Incorporating these factors is a signifi cant challenge because information is limited. For insect pests, although trends noted for insects in general (e.g. Parmesan and al, 1999; Parmesan and Yohe, 2003; Parmesan, 2006; Bebber, 2015) might apply, specifi cs will vary widely because the potentially contributing mechanisms are diverse. These include changes to survival rates in winter and summer, population growth rates, shifts in phenology and changes in interspecifi c interactions (Kiritani, 2013). Effects that can Chapter 42_Wheat V1.indd 1 Chapter 42_Wheat V1.

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