Written by cpm
Download PDF It’s all change this autumn as far as desiccation strategies are concerned. CPM investigates the alternatives to diquat and finds out their possible effects on crop management decisions and costs. PPO products were 2-4 days slower in killing leaves than Reglone. By Lucy de la Pasture Key recommendations for 2020 So what are the practical recommendations from the trials that will support growers’ decision-making processes this season? Temperature can play a part when applying PPOs, says Mark. “At T1/T2, sprays were mostly applied during moderate conditions (16-18 C) during mid-late morning. Time of application for Spotlight/Gozai was more crucial later in the season when it was cooler. We’ve found it’s best to aim for early to mid-morning application to give the chemical maximum time to kill cells.” Soil moisture at the time of desiccation plays a part in the speed of skin-set. “Most sites were desiccated with wet soil in 2019 and it would be expected that this would result in slower skin-set than in dry soils.” Variety can also have a big effect. “In the trials, Royal had not set its skin at four weeks after initial application or defoliation. Stem desiccation in this variety delayed skin-set despite…
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