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Fungicide activity and performance in wheat

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Fungicide activity and performance in

Fungicide activity and performance in wheat Choosing fungicides Fungicides should be matched to the primary disease risk, which depends mainly on variety, sowing date, location and local weather. Mixtures and alternations of fungicides with different modes of action, from different fungicide groups, are often most effective and reduce the likelihood that fungicide resistance will develop in target pathogens. Fungicide activity against major diseases Chemical group Active ingredient Amidoxine cyflufenamid Anilinopyrimidine cyprodinil Benzophenone metrafenone Chloronitrile chlorothalonil 3 Dithiocarbamate mancozeb 3 Imidazole prochloraz (poraz) carbendazim MBC thiophanate-methyl fenpropidin Morpholine fenpropimorph Phthalimides folpet 3 Quinazolinone proquinazid Quinolene quinoxyfen fluxapyroxad 4 SDHIs penthiopyrad 4 bixafen + fluopyram + prothioconazole bixafen + prothioconazole boscalid + epoxiconazole fluxapyroxad + epoxiconazole SDHIs + other 2 fluxapyroxad + metconazole fluxapyroxad + pyraclostrobin isopyrazam + epoxiconazole penthiopyrad + chlorothalonil solatenol + prothioconazole 5 Spiroketalamine spiroxamine azoxystrobin picoxystrobin Strobilurin (QoI) pyraclostrobin trifloxystrobin Strobilurin dimoxystrobin + epoxiconazole mixtures 2 fluoxastrobin + prothioconazole cyproconazole difenoconazole epoxiconazole fluquinconazole Triazole 3 flutriafol metconazole propiconazole prothioconazole tebuconazole Resistance poses a significant threat to the on-going performance of fungicides and resistance management must be taken into account when planning fungicide programmes. Fungicides are tested by AHDB Cereals & Oilseeds in specific performance trials and in other research projects targeting specific Information Sheet 56 Spring 2017 diseases. Performance ratings are indicative and are dependent on dose rate and timing. Control level 5 = Highest 1=Lowest - = insufficient data but may have some activity: check label Activity rating Eyespot Mildew Septoria Yellow Brown Ear tritici rust rust blight 1 - 4 - - - - 4 2 - - - - 3 4 1 - - - - 1 4 - - - - 1 3 1 1 - 3 1 1 1 1 - 1 1 1 1 1 2 - - - - - 2 - 3 1 2 2 - - 2 1 2 3 - - - 2 1 1 - - 4 - - - - - 2 - - - - - - 4 3 4 - - - 4 3 4 - 4 3 5 4 5 4 4 3 5 4 5 4 4 2 3 4 4 - 4 2 5 5 5 2 - 2 5 4 5 3 - 2 4 4 5 - 2 2 4 5 5 - - - 4 3 3 - - 3 5 - - 4 - 2 - 2 4 - - 1 1 3 4 - 1 1 1 4 3 - 1 1 1 4 5 - - 1 1 2 2 - - - 2 4 4 3 4 2 3 4 5 3 1 2 1 4 3 - - 1 2 1 3 - 2 2 3 5 4 2 - 2 2 3 3 3 - 1 1 2 2 - - 2 2 3 4 3 1 1 1 2 2 - 4 3 3 4 2 4 - 2 1 4 4 3 1 Ear blight caused by Fusarium culmorum or Fusarium graminearum. Performance against Microdochium species may differ. 2 Different products may contain different loadings and formulations which may impact on the level of control. See 'Active ingredients for wheat disease control' tables for products tested in the AHDB Cereals & Oilseeds fungicide performance trials. 3 Key products may have significant difference between performance in protectant and eradicant situations. This score is for the protectant situation. 4 Significant resistance risk. Always use SDHI fungicides in mixture with at least one fungicide from an alternative mode of action group which has efficacy against the target pathogen(s). 5 This score is based on only one year's data.

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