Climate Change Impacts on Insect Herbivore Dynamics

Climate change is reshaping the interactions between plants and their insect herbivores through multifaceted alterations in temperature, atmospheric composition and precipitation patterns. Rising temperatures often accelerate insect development and extend growing seasons, enabling more generations per year and expanding geographic ranges toward higher latitudes and elevations. Elevated carbon dioxide concentrations can modify plant nutritional quality and defensive chemistry, with consequences for herbivore growth, consumption rates and survival. Altered precipitation regimes further influence host‐plant vigour and insect life cycles, while shifting phenologies can decouple synchrony between herbivores, their food plants and natural enemies. These changes cascade through trophic interactions, often intensifying herbivore pressure on crops and natural vegetation, challenging existing pest management approaches. Moreover, climate‐driven range expansions facilitate local persistence of pest species, favouring the evolution and spread of pesticide resistance. The global and economic significance of these dynamics underlines the urgent need for integrative research that combines field observations, experimental manipulations and modelling to predict species‐specific responses and to design adaptive management strategies.

Research from Nature Portfolio

Recent studies demonstrate that subtle increases in winter temperatures have expanded the overwintering range of a major agricultural pest by millions of square kilometres, enabling continuous year‐round populations in regions previously unsuitable for survival. This persistent local presence has been linked to dramatically higher levels of pesticide resistance, indicating that climate warming not only alters spatial distribution but also drives evolutionary change in herbivore populations. Such findings emphasise the intertwined ecological and evolutionary responses of insects to global warming and signal the need for revised pest‐control frameworks that account for shifting resistance patterns.

Climate Change Impacts on Insect Herbivore Dynamics publication trend

The graph below shows the total number of articles in climate change impacts on insect herbivore dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Overwintering range: The geographic and climatic area in which an insect species can survive the winter stages of its life cycle.

Voltinism: The number of generations an insect species completes within a single year.

Phenology: The timing of seasonal biological events, such as emergence, reproduction and migration, in relation to environmental cues.

Trophic interactions: Feeding relationships connecting producers, herbivores and predators or parasitoids within an ecosystem.

Synchrony: The alignment of life‐cycle events between interacting species, such as herbivores and their host plants or natural enemies.

Pesticide resistance: The inherited ability of insect populations to survive exposure to doses of pesticides that would normally be lethal.

References

1. Effects of industrial pollution and ambient air temperature on larval performance and population dynamics of Eriocrania leafminers (Lepidoptera). The Science of The Total Environment (2024).
2. The Impact of Climate Change on Agricultural Insect Pests. Insects (2021).
3. Complex responses of global insect pests to climate warming. Frontiers in Ecology and the Environment (2020).
4. Climate warming promotes pesticide resistance through expanding overwintering range of a global pest. Nature Communications (2021).
5. Effects of CO2 and Temperature on Tritrophic Interactions. PLOS ONE (2013).
6. Climate variation alters the synchrony of host–parasitoid interactions. Ecology and Evolution (2017).