Septoria

Get ahead and stay ahead of cereal disease control with ARIZONA

After another wet winter, our regional agronomy managers have reported significant levels of septoria and rusts already clearly visible in wheat crops across the UK, with the highest levels of disease being seen in those crops which were drilled in the early part of autumn. A robust start to spring fungicide programmes will therefore be essential to ensure these crops are properly protected as soon as possible so that they can remain ahead of diseases and go on to produce a viable yield and return on investment.
Spring Blog
25 February, 2025
6min read
Septoria

For those crops facing really high levels of disease pressure (susceptible varieties that were sown early and have been sitting in wet conditions) the best form of attack is to apply a strong fungicide treatment at T0 to protect Leaf 4 and to reduce fungal spores going on to infect subsequent leaves.

The need to provide robust protection this early in the season is more important than ever as many of the fungicide active ingredients that once provided curative activity are no longer as effective as they used to be, due predominantly to the erosion of their efficacy by increasingly resistant disease strains. As such, we can no longer rely on T1 applications to pull infections back, especially if weather conditions mean the timing of T1 treatments is compromised and therefore less than optimal.

It therefore makes sense to bring spring disease protocols forwards by applying a T0 fungicide treatment.

First line of defence

In circumstances where septoria is the driver for a T0 treatment, ARIZONA (500 g/l folpet) is the ideal option: this multi-site fungicide can be used either as a standalone product to protect against septoria, or, where additional diseases present a threat, as a tank mix partner to power-up the efficacy of other modes of action.

Including ARIZONA (500 g/l folpet) at the T0 timing is recommended in the following situations:

  • Where septoria is the main disease: use a standalone application of ARIZONA
  • Where there is an additional threat of rust or if active rust is present in the crop: use ARIZONA alongside an appropriate azole-based product

In all these scenarios, using ARIZONA (500 g/l folpet) at T0 will also provide peace of mind by ensuring crops have been protected if/when subsequent T1 applications are delayed.

Added benefits

As well as providing effective protection against septoria, ARIZONA also offers additional benefits in wheat, including:

  1. Delivers a reliable return on investment by extending green leaf area duration, resulting in higher yields and enhanced crop quality
  2. Provides a useful reduction of yellow and brown rusts
  3. Protects partner products against the development of disease resistance

Beyond T0

Thanks to its flexible label which enables it to be applied at a maximum total dose of 3.0 l/ha per crop (1.5 l/ha maximum individual dose), ARIZONA can also be applied later in the season. For example, applying 1.0 l/ha at T0 will enable an additional 2.0 l/ha to be applied later in the season (either at T1 and/or T2) thereby ensuring crops stay protected for longer.

To find out more about how ARIZONA could work in your rotation, contact your Regional Agronomy Manager by calling the ADAMA technical helpline on 01635 876 622 or via email at ukenquiries@adama.com

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ARIZONA (folpet 500 g/l) not only provides good early season protection against septoria but also boosts yields and protects and prolongs the efficacy of ‘at-risk’ single site modes of action.

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ARIZONA® (folpet 500 g/l) is a unique multi-site fungicide that provides valuable additional protection against key diseases in wheat and barley. ARIZONA delivers a reliable return on investment through enhanced disease control, and safeguards the efficacy of partner products as part of an anti-resistance strategy.

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