Written by cpm
Download PDF It might be tempting to focus most fungicide firepower on T2. But with unpredictable weather and disease risks, is this shutting the stable door after the horse has bolted? CPM finds out. If the wheels come off early with yellow rust control, you never get the crop back. By Rob Jones and Lucy de la Pasture Few of us need reminding how unpredictable yellow rust has become over recent seasons – including growers in the west where yellow rust hasn’t historically been that much of a problem. Septoria tritici also has a history which shows it’s becoming more difficult to control. Seasons such as the washout summer of 2019, when sudden weather changes exposed any weaknesses in earlier fungicide inputs, have provided some harsh lessons. So while the flag leaf remains the biggest yield contributor in winter wheat, it’s no longer possible to rely on a robust T2 to rectify things if disease has already got out of hand. Instead, a good T1 has become increasingly important for keeping a lid on infection earlier, says Harry Fordham, new farming technology lead at Syngenta. At T1 plants are growing more upright so you want the spray to penetrate down…
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