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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.
Introduction
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
Products
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.
Mixtures (chart on the left)
- Univoq – fenpicoxamid + prothioconazole: A QII + DMI/azole
- Ipresso – isoflucypram + prothioconazole: An SDHI + DMI/azole
- Jessico Fusion [NEW] – isoflucypram + fenpicoxamid: An SDHI + QII
Straights (chart on the right)
- Myresa – mefentrifluconazole (revysol): a DMI/azole
- Peqtiga – fenpicoxamid (inatreq): a QII
- Vimoy – isoflucypram (iblon): An SDHI
- Miravis Plus – pydiflumetofen (adepidyn): An SDHI
Both charts
Both charts also include two products tested at full label dose.
- Arizona – folpet: a multi-site
- Proline 275 – prothioconazole: a DMI/azole
These are included as standards. As there is a good understanding of their performance, they provide reference points from which to compare other fungicides.
Further information
- Check product labels prior to use
- Most single active products are only recommended for use in mixtures with fungicide(s) with an alternative mode of action with efficacy against the target disease
Check the HSE plant protection product database for authorisation status
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).
A selection of the key charts (first published on 9 December 2025) are shown below.
Access the full fungicide performance results
Septoria tritici
Disease response (protectant)
 2023–25.jpg)
AHDB
Disease response (eradicant)
 2023–25.jpg)
AHDB
Yield response
AHDB
Summary
- 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
All fungicide performance results
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. These are available, alongside the presentation slides and video, from the fungicide performance home page.