Fungicide in Soybeans DEMAND NEW HOLLAND https://agriculture.newholland.com/nar/en-us EQUIPPED FOR A NEW WORLD™ Bob Mark New Holland Sales Ltd. Campbellford • 705-653-3700 Bob Mark New Holland Sales Ltd. Lindsay • 705-324-2221 Bob Mark New Holland Sales Ltd. Napanee • 613-354-9244 Bob Mark New Holland Sales Ltd. Sunderland • 705-357-3121 Delta Power Equipment Mitchell • 519-348-8467 Delta Power Equipment St. Marys • 519-349-2180 Delta Power Equipment Tilbury • 519-682-9090 Delta Power Equipment Waterford • 519-443-8622 Delta Power Equipment Watford • 519-849-2744 Delta Power Equipment Winchester • 613-774-2887 Ebert Welding Ltd. New Liskeard • 705-647-6896 ESM Farm Equipment Ltd. Wallenstein • 519-669-5176 Maxville Farm Machinery Ltd. Maxville • 613-527-2834 McCauley Equipment Sales Orillia • 705-325-4424 Oneida New Holland Caledonia • 905-765-5011 Oneida New Holland St Catharines • 905-688-5160 Regional Tractor Sales Ltd. Freelton • 905-659-1094 Richards Equipment Inc. Barrie • 705-721-5530 Robert’s Farm Equipment Sales, Inc. Chesley • 519-363-3192 Robert’s Farm Equipment Sales, Inc. Mount Forest • 519-323-2755 Robert’s Farm Equipment Sales, Inc. Walton • 519-887-6365 Smiths Farm Equipment (Jasper) Ltd. Jasper • 613-283-1758 Stewart’s Equipment Erin • 519-833-9616 PAUL HERMANS Paul Hermans, CCA-ON is an area agronomist in Eastern Ontario with Corteva Agriscience. two applications applied that showed a 9.9-bushel advantage compared to the one-pass system. There is no surprise here, as flowering occurred during a longer period. This long reproductive stage was compromised by continual wet canopies and soil moisture that aided white mould development. Interestingly enough, on two plots that were planted across the road from each other, they had varying results. One trial planted earlier, on May 18, with five varieties ranging in maturity from 0.4 to 1.2, saw a 0.5-bushel advantage. The later planted plot, planted May 23 with the same varieties, had a 4.2-bushel advantage. You may ask yourself why this would be. The difference is timing of when flowering occurred, and when most of the crop was experiencing spores from white mould. In another trial, conducted by P.T. Sullivan Agro, they looked at a range of soybean maturities from 0.3 to 2.8 RM with a total of eight varieties planted. The trial was planted over three planting dates: April 16, May 11, and June 2, 2023. The highest yielding date was April 16 at 62 bushels, followed by June 2 at 42 bushels. The May 11 planting date yielded 40 bushels. White mould plot scores were taken for each planting date. April 16 was 2.25, May 11 was 4.5, and June 2 was 2.2. The May 11 planting date had the highest mould infections (1 being minimal and 5 being heavy pressure). Again, this shows timing effect of critical flowering periods and how they relate to white mould infection. Going forward, research initiatives are looking at utilizing computer modelling programs that will allow us to get a better handle on application timing to ensure we have better white mould control. I realize a lot of areas in Ontario do not have white mould pressure like we have in Eastern Ontario, so what would the strategy be in these areas to increase soybean plant health? One fungicide application in these environments will suffice and aid yield improvements. Timing in the R2.5 to 3 stage is advisable for a one-pass system. Get a good handle on what diseases you have present and what fungicides are most active on those diseases for better returns. Plant health is the key reason for applying a one-fungicide application in the absence of white mould. To summarize, yield can be divided into three parts: Total number of pods, number of beans per pod, and the size (weight) of the beans (seed size). What can you do throughout the 2024 growing season to make a positive change to affect one of these three parts? Wishing you a bountiful soybean cropping season! BF
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