Tree Care Series 2026: Historic Pests and Changing Climate

North America has a history of exotic pests that have extirpated individual tree species, with emerald ash borer as a modern example. In the current, ever-globalizing society, there is a significant risk for future outbreaks that may impact all trees, from the urban forest to woodlands. This presentation examines past outbreaks to compare what has been learned about historic pests with the current pests threatening native trees.

Presenter: Ryan Pankau, Illinois Extension horticulture educator

Urban Forest Trees in a Changing Climate: Impacts and Strategies 

Climate change is intensifying biotic and abiotic stressors on urban forest trees, from extreme temperature fluctuations to increased pest pressures. This session will explore how these evolving conditions impact tree health, species performance, and urban canopy resilience. Additionally, learn to examine adaptive strategies to mitigate climate-related risks and maintain healthy urban forests. 

Presenter: Justin Vozzo, Illinois Extension specialist, forestry