How Climate Change Is Reshaping Plant Disease Risks in Europe
The relationship between climate and agriculture has always been close, but it is becoming less predictable. Changes in temperature, rainfall, and the frequency of extreme weather events are affecting not only how crops grow, but also how plant diseases behave. This raises a practical question: how are plant diseases changing under current climate conditions in Europe, and what does that mean for farmers?
While the connection between climate and plant health is well understood, its effects are now becoming more visible in day-to-day farming. Patterns that used to be relatively stable are starting to shift, making plant protection more difficult to plan.
Climate as a Driver of Plant Disease Risk
Plant diseases depend heavily on environmental conditions. Temperature, humidity, and rainfall influence how pathogens develop, spread, and survive between growing seasons. As these conditions change, disease risks change with them.
According to the European Food Safety Authority (EFSA), climate change is contributing to the emergence of new plant pests, while also affecting the frequency and intensity of existing ones. Warmer temperatures can speed up fungal development, while milder winters allow pathogens to persist in areas where they were previously less common.
In practice, this means that crop diseases are not only appearing in new places, but also behaving differently in terms of timing and spread.
Changing Disease Patterns Across Europe
Across Europe, these changes are already being observed. Diseases that were once limited to certain regions are now appearing elsewhere, while others are becoming less predictable from one season to the next.
Warmer conditions are allowing some fungal diseases to move further north, while shifts in rainfall are creating conditions for outbreaks in areas that were previously less affected. At the same time, variability between seasons is increasing. Farmers are dealing not only with gradual changes but also with sudden disease pressure linked to unusual weather.
This makes planning more difficult. Approaches based on past experience do not always work in the same way under changing conditions.
A Closer Look: Wheat Rust
Wheat rust is one of the clearer examples of how plant diseases respond to changing climate conditions. These fungal diseases are strongly influenced by temperature and moisture.
In recent years, wheat rust has been observed at different levels and in areas where it was previously less common. Yellow rust remains widespread in Northern and Central Europe, while stem rust has reappeared in parts of Southern Europe.
New pathogen variants have also been observed spreading across regions. In some cases, the same strain has been detected in multiple countries within a single growing season.
Similar patterns can be seen in other crops. Potato production continues to face pressure from diseases such as late blight, while grain legumes are affected by fungal pathogens that respond to environmental conditions. These examples show how disease risks are shifting across different farming systems.
What This Means for Farmers
For farmers, these changes are practical rather than theoretical. One of the main challenges is uncertainty. Knowledge based on previous seasons becomes less reliable when disease patterns shift. A disease that usually appears at a certain time may now emerge earlier, later, or with greater intensity.
There is also a greater need for monitoring. When conditions favour rapid disease development, delays in detection can lead to losses. In the case of wheat rust, infections can develop quickly if not addressed in time.
At the same time, relying only on chemical control is becoming less effective and less aligned with current policy directions. This is increasing the need for approaches that combine different methods.
The Role of Technology and Data
As disease patterns become less predictable, access to reliable information becomes more important. Monitoring systems, field observations, and shared data can help identify risks earlier and support more informed decisions.
This is where projects like IPMorama contribute. The project focuses on supporting Integrated Pest Management (IPM) across crops such as wheat, potatoes, and grain legumes.
In practice, this includes monitoring activities that track disease development across regions. For example, wheat rust surveys bring together farmers, researchers, and advisors to share observations and build a clearer picture of current risks.
The project also supports work on crop resistance and knowledge exchange between different actors. These efforts are aimed at making plant protection more responsive to changing conditions.
Looking Ahead
Climate change is already affecting plant disease risks across Europe, and these changes are likely to continue. While the underlying processes are understood, their combined effects make farm-level decisions more complex.
Responding to this requires better monitoring, more consistent data sharing, and approaches that can adapt to local conditions. It also requires closer links between research and practice.
Projects such as IPMorama show how this can be approached by connecting scientific work with practical farming needs and supporting more resilient crop protection strategies.
As conditions continue to change, the focus is gradually shifting from reacting to problems towards anticipating them and managing risk more effectively.