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      Cereals event guide 2025 available now

      By Matthew TiltJune 20, 2025
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    Arable & Livestock

    Life Scientific warns of a perfect storm for yellow rust

    Matthew TiltBy Matthew TiltMarch 29, 20222 Mins Read
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    yellow rust T0

    Getting on top of yellow rust is crucial to avoid losing valuable margin and can be achieved in a very cost-effective way, says Ruth Stanley UK & IE country manager for Life Scientific.

    “Protecting and maintaining green leaf area for as long as possible with a well-planned fungicide programme is essential, as allowing any disease to take hold reduces the crop’s photosynthetic capacity, increasing the likelihood of earlier senescence and lower yields,” she said.

    “It is well worth remembering that yield losses of 40–50% can often occur in untreated yellow rust susceptible wheat varieties. Wheat crops generally established well last autumn and are showing great potential so it does not make sense to start losing yield this early on in the season – especially when control can be achieved very cost-effectively.

    “Most wheat crops will be approaching T0 at the end of March or beginning of April with the exception of some early drilled crops or varieties. Fortunately, the yellow rust pathogen remains sensitive to azoles and tebuconazole is very effective at knocking out any early yellow rust infection, but also preventing the onset of disease. If there are no pustules visible yet, they are on their way.”

    Zonor, an off-patent product from Life Scientific, contains 250g/l tebuconazole and reportedly provides a cost-effective option for yellow rust control.

    “Even a 50% dose of Zonor provides enough azole to prevent disease building and yield loss before the T1 timing,” Mrs Stanley said before advising that farmers pay attention to varietal rust ratings. “Prioritise spraying susceptible varieties rated 3 or 4, but varieties with higher Recommended List ratings cannot be ignored, especially if it is based on adult resistance, which may not kick in until late in the season.

    “If disease establishes early, it can cause significant damage before adult resistance takes effect, so needs controlling.”

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    Matthew Tilt
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    Machinery editor for Farm Contractor & Large Scale Farmer. Matt has worked as an agricultural machinery journalist for five years, following time spent in his family’s Worcestershire contracting business. When he’s not driving or writing about the latest farm equipment, he can be found in his local cinema, or with his headphones in, reading a good book.

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