The perfect multi-site partner for spring fungicide programmes
15th February 2021
As a multi-site inhibitor, Arizona (500g/l folpet) is the ideal addition to cereal fungicide programmes this spring thanks to its ability to boost yields by providing cost effective efficacy against septoria, rhynchosporium and ramularia.
Arizona’s multi-site mode of action also enables it to protect single site active ingredients (SDHIs, azoles and strobilurins) from the ongoing threat of resistance and can even extend the effective life of partner products.
Arizona also boasts the added benefit of being flexible enough to use at a range of application timings, thereby enabling its use to be tailored according to the current level of disease pressure and in accordance with the disease resistance rating of the variety being grown.
Yield improvements and valuable efficacy in wheat
A series of 26 trials carried out over a three-year period have shown that adding Arizona to wheat fungicide programmes at T1 consistently contributes to an average yield increase of 0.27t/ha.
Further work carried out by ADAS in 2020 showed that Arizona also adds valuable septoria control when used in conjunction with leading products such as Ascra Xpro and Revystar: at a spend of £40/hectare, a two-spray programme of Ascra and Arizona delivered a 9% increase in efficacy compared to an equivalent spend on Ascra alone, with this benefit carrying through to an improved yield and enhanced margin over fungicide costs.
Arizona offers significant benefits in barley, with Irish trials conducted by Teagasc showing that, in a high-pressure ramularia situation, adding Arizona to an SDHI and triazole at T1 and T2 delivered an improvement in disease control efficacy and extended green leaf area.
This is backed-up by additional trials work which has shown that, compared to a single application at T2, a two-spray programme of Arizona (plus a triazole/SDHI) at T1 and T2 can deliver an increase in yield of 0.5t/ha.
A unique mode of action
As a multi-site inhibitor, Arizona works against various bio-chemical pathways within fungal cells (interfering with spore germination, cell division and mitochondrial energy production) which makes it less susceptible to resistance compared to single site actives such as SDHIs, azoles and strobilurins.
This multi-site mode of action also contributes to Arizona’s ability to extend the life of partner products: Arizona is the only fungicide that has been proven to protect and prolong the effective life of single site actives, with modelling work carried out by ADAS demonstrating that partnering Arizona with fluxapyroxad can significantly extend the latter’s in-field efficacy and double its effective life.
As such, FRAG UK (Fungicide Resistance Action Group) describes folpet as a “valuable tool to manage resistance and (one which) provides added levels of disease control whilst protecting and prolonging the efficacy of at-risk chemistries”.