Fungicide performance dose-response curves for septoria tritici in winter wheat

Our fungicide performance trials provide independent information on the relative efficacy of fungicides against septoria tritici in winter wheat. This page features the latest disease and yield dose-response curves.

Data from our fungicide performance trials is used to plot dose-response curves. The charts show the average performance of fungicide products – disease and yield responses – across sites, seasons and leaf layers.

Curves that fit the data points well and have clear separation are most likely to reflect real differences, in terms of field performance.

To maximise differences between treatments, the trials use:

• High-disease-risk locations
• Highly susceptible varieties
• One spray timing

It is not possible to test all products in fungicide performance trials. The products are carefully selected to:

• Provide the most relevant results
• Give equal opportunity for agrochemical companies to include products in trials
• Put emphasis on testing pre-registration or new active ingredients*
• Include standard products for which there is good understanding of performance (to aid comparisons)

*Only authorised plant protection products feature in the dose-response curves.

Note: For the cereal trials, the doses are quarter, half, full and double the recommended label rate (the latter improves the ‘fit’ of curves, but these results are not published online).

We’re gearing up to launch the latest fungicide performance data online at the Agronomy Conference on 9 December 2026.

This year, we've reviewed the way dose-response curves are presented to make sure as many people as possible can use the results.

The changes will mainly affect graph colours and labels.

During the transition period, some graphs may be temporarily unavailable.

It currently includes the septoria tritici graphs.

If you need access to these graphs, please contact us.

• Miravis Plus – pydiflumetofen, Peqtiga – fenpicoxamid, Jessico Fusion – isoflucypram + fenpicoxamid, and Univoq – fenpicoxamid + prothioconazole achieved the highest control levels
• Vimoy – isoflucypram and Myresa – mefentrifluconazole maintained good activity
• Mixtures offer more robust disease control and yields than straight fungicides
• Use a combination of fungicide mode of action groups to reduce the risk of resistance development

The full fungicide performance results cover all target diseases for wheat, barley and oilseed rape.

The charts on this web page show the average performance of fungicide products over multiple seasons.

The full results also include single-year data.

The latest results are released in December at the annual Agronomy Conference.