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Early rust findings prompt green bridge warning

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Growers are urged to control the 'green bridge' now and choose disease resistant crop varieties, after wheat stem rust, barley leaf rust and powdery mildew were found in Western Australia's southern cropping regions... Department of Agriculture and Food (DAFWA) researcher Kith Jayasena, whose research is supported by the Grains Research and Development Corporation (GRDC), said the detection of significant amounts of wheat stem rust this year was of particular concern as the disease could cause yield losses of up to 90 per cent in susceptible wheat varieties... " the strategy, when applied in trials in the high yielding environment of Gibson in the Esperance region, provided yields 56 per_cent greater than the unsprayed crop, and economic returns of $399 per hectare - compared with $83/ha from a single fungicide application at the first sign of the disease, and $111/ha for a single spray three weeks after the disease becomes evident," he said...
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