Pushing performance – Getting the most from chemistry

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Written by cpm

Download PDF The odds of hitting your target go dramatically up when you aim at it and the same could be said to be true when blight spraying. CPM finds out how to set the sights more firmly on preventing the disease. Even the strongest fungicides can have weak spots due to poor coverage. By Lucy de la Pasture The umbrella-like canopy of the potato plant provides a challenge when it comes to applying blight sprays to crops. With good coverage going hand-in-hand with good blight protection, getting adequate chemistry onto the lower leaves is no easy feat. The changing blight population and increasingly aggressive genotypes make achieving the panacea where blight fungicide is distributed throughout the canopy, even more important, says Stuart Sutherland, Interagro’s technical manager. The evolution of more aggressive strains of blight requires closer spray intervals, making it more difficult to apply blight products under ideal conditions. “The newest, highly aggressive blight strains, 37_A2 and 36_A2, join 13_A2 and 6_A1 in being able to rapidly exploit any weaknesses in spray coverage within the canopy. Even the strongest fungicides can have weak spots due to poor coverage,” he says. As well as being more aggressive, these blight strains…
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