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Fungicide activity and performance in wheat

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Seed treatment options

Seed treatment options Seed-borne diseases Other diseases Pests Active ingredient Product carboxin, thiram Anchor Ar clothianidin, Redigo By prothioconazole Deter difenconazole, Celest Extra Sy fludioxonil fludioxonil Beret Gold Sy fludioxonil, Austral Plus Sy tefluthrin fluquinconazole Galmano By fluquinconazole, Jockey Bs prochloraz ipconazole, Rancona Ar imazalil iMIX prothioconazole Redigo By prothioconazole, Redigo Pro By tebuconazole prochloraz, Kinto Bs triticonazole silthiofam Latitude Mo Microdochium seedling blight – Microdochium species ✓ Fusarium seedling blights – Fusarium graminearum F. culmorum Septoria seedling blight – Phaeosphaeria nodorum ✓ Loose smut – Ustilago nuda f. sp. tritici Bunt soil-borne – Tilletia caries Take-all – Gaeumannomyces graminis (var tritici) Blue mold – Penicillium species ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ Yellow rust Septoria tritici Brown rust Aphids (BYDV vectors) Wireworm Slugs Wheat bulb fly Ar = Arysta Bs = BASF By = Bayer CropScience Mo = Monsanto Sy = Syngenta ✓ label recommendation, control may only be partial, please refer to product label Wheat disease management guide This Information Sheet is an annually updated supplement to the Wheat disease management guide. The guide includes information on symptoms and risk factors for the main wheat diseases. See cereals.ahdb.org.uk/publications Information Sheet 56 Spring 2017 AHDB Cereals & Oilseeds publications are free to levy payers Electronic version can be downloaded at cereals.ahdb.org.uk To join the mailing list, contact: cereals.subscriptions@ahdb.org.uk While the Agriculture and Horticulture Development Board seeks to ensure that the information contained within this document is accurate at the time of printing, no warranty is given in respect thereof and, to the maximum extent permitted by law, the Agriculture and Horticulture Development Board accepts no liability for loss, damage or injury howsoever caused (including that caused by negligence) or suffered directly or indirectly in relation to information and opinions contained in or omitted from this document. Reference herein to trade names and proprietary products without stating that they are protected does not imply that they may be regarded as unprotected and thus free for general use. No endorsement of named products is intended, nor is any criticism implied of other alternative but unnamed products. AHDB Cereals & Oilseeds is part of the Agriculture and Horticulture Development Board. © Agriculture and Horticulture Development Board 2017. All rights reserved.

Fungicide dose-response curves Fungicides are rigorously tested in AHDB Cereals & Oilseeds-funded trials. Each year, a single spray is applied at a range of doses on varieties that are very susceptible to each major disease and at sites where disease pressure is high. Disease levels are observed a few weeks later. Septoria tritici – Protection 20 18 16 14 Septoria tritici % 12 10 8 6 4 2 0 0% 25% 50% 75% 100% Percentage of full label rate Adexar Ascra Xpro Aviator Xpro Ignite Imtrex Librax Proline Vertisan Vertisan + Ignite Septoria tritici – Eradication Septoria tritici % 30 25 P 20 15 10 Protection and eradication 'Protection' curves show the activity of fungicides when they are applied soon after the emergence of a leaf layer before much infection has occurred. 'Eradication' curves indicate fungicidal activity after infection has occurred but before symptoms become visible. Performance of products on each leaf layer and at each site was classified as protectant or eradicant based on timing of leaf emergence relative to spray application. 5 0 0% 25% 50% 75% 100% Percentage of full label rate Use Imtrex and Vertisan only in mixture with at least one fungicide with an alternative mode of action that has comparable efficacy against the target pathogen(s).

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