8/25/2023 0 Comments Difenoconazole early blight tomato**0 (no effect) no difference from control plots that receive no fungicide + (poor) inconsistent control and/or some effect at reducing ++ (OK to good) consistent control, does not perform as well as +++ products in all years +++ (very good) consistent control, consistently one of the best fungicides in the trial. *Not all products may be registered for this crop-disease combination. Mono- and di-potassium salts of phosphorous acid + copper octonoate + polyoxin D zinc salt Mono- and di-potassium salts of phosphorous acid + chlorothalonil (2.4 L/Ha) Mono- and di-potassium salts of phosphorous acid + copper octonoate Mono- and di-potassium salts of phosphorous acid Pydiflumetofen (‘Adepidyn’) + difenoconazole Fungicide applications were made using labelled rates on a 10-day interval. A mixed infection of Septoria leaf spot and early blight occurred in some years. high level of defoliation in nontreated plots) and significant levels of late blight were absent. Early blight ratings are from trials completed when disease pressure was high (ie.* Not all products may be registered for this crop-disease combination. Only data from trials with high disease pressure were considered in developing these ratings. Fungicide trials for anthracnose management are completed on a regular basis at the Ridgetown Campus, University of Guelph.An Ontario-specific version of fungicide ratings for late blight by Janice LeBoeuf (formerly OMAFRA) was updated in 2017 and is posted here.Listed products are registered for field tomatoes in Canada but may not be registered for the specific crop-disease combination for which they are listed in the tables. Always check the most recent version of the product label before applying any product.The tables are for information only and do not guarantee successful results with the use of any product. Please contact the author for more information on research methods and copies of full reports. These tables were created using results from replicated processing tomato field trials at the Ridgetown Campus, University of Guelph.Cheryl Trueman, Ridgetown Campus – University of Guelph
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