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Early soya rust detection in southern Brazil

Brazil is suffering from early appearances of Asian soybean rust ( Phakopsora pachyrhizi). The incidences have been detected in the states of Mato Grosso, Parana, Tocantins and Goias. A researcher at the anti-rust consortium, Consórcio Antiferrugem, José Tadashi Yorinori, rates the Parana find as “quite worrying” as the disease is “in the air, waiting for the first soybean plantings”. The early appearance of rust is down to recent rain. Some 15% of the crop area in Parana has so far been planted with soybeans. The crop is taking a larger share of the national planting area this year (see this issue). Several states had implemented a 90 day-period of fallow before planting of this season’s soybean crop ( Agrow passim). It was interrupted ten days before ending in Goias, following the detection there.


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