Research shows cereal choice can reduce grassweed levels

Written by Charlotte Cunningham

A study conducted by Syngenta has shown that the choice of winter cereal crop grown can reduce ryegrass levels by nearly 90%. Charlotte Cunningham reports. Conducted by Syngenta at its Innovation Centre in Staffs, the work recorded the numbers of ryegrass heads surviving in four winter crops – conventional winter wheat, conventional two-row winter barley, conventional six-row winter barley, and hybrid barley. Two varieties of each conventional cereal were grown and one hybrid barley. Compared with an average of 69 ryegrass heads/m2 surviving in the winter wheat, conventional two-row winter barley reduced the number to 53, while conventional six-row winter barley reduced the number further, down to 30. But by far the biggest reduction occurred in hybrid barley – where ryegrass numbers were cut by nearly 90%, leaving just eight ryegrass heads/m2. These figures were in the absence of herbicide applications, and with hybrid barley drilled at its standard rate of 200 seeds/m2, compared with 350 seeds for winter wheat and 325 seeds/m2 for the two-row and six-row conventional barleys. “This new set of results mirrors other findings we have seen on grassweed suppression with hybrid barley,” explains Syngenta seeds technical manager, Paul Roche. “Not just against ryegrass but also…
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[N.Yorks.]

Written by Charlotte Cunningham

A study conducted by Syngenta has shown that the choice of winter cereal crop grown can reduce ryegrass levels by nearly 90%. Charlotte Cunningham reports. Conducted by Syngenta at its Innovation Centre in Staffs, the work recorded the numbers of ryegrass heads surviving in four winter crops – conventional winter wheat, conventional two-row winter barley, conventional six-row winter barley, and hybrid barley. Two varieties of each conventional cereal were grown and one hybrid barley. Compared with an average of 69 ryegrass heads/m2 surviving in the winter wheat, conventional two-row winter barley reduced the number to 53, while conventional six-row winter barley reduced the number further, down to 30. But by far the biggest reduction occurred in hybrid barley – where ryegrass numbers were cut by nearly 90%, leaving just eight ryegrass heads/m2. These figures were in the absence of herbicide applications, and with hybrid barley drilled at its standard rate of 200 seeds/m2, compared with 350 seeds for winter wheat and 325 seeds/m2 for the two-row and six-row conventional barleys. “This new set of results mirrors other findings we have seen on grassweed suppression with hybrid barley,” explains Syngenta seeds technical manager, Paul Roche. “Not just against ryegrass but also…
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That sounds really interesting. Do you have the full peer reviewed paper to publish so we can see how the trial was designed and the statistical analysis you applied etc etc? Having that information will help me understand what you did and give me confidence in the statements. Thanks.