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Correct fumigation of stored grain a priority

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"It is critically important that growers implement best practice when storing grain, particularly in relation to fumigation," said Peter Botta, grain storage specialist for southern New South Wales, Victoria, South Australia and Tasmania... To control pests at all life stages and prevent resistance, phosphine gas concentration needs to reach 300 parts per million (ppm) for seven days (when grain is above 25C) or 200ppm for 10 days (between 15-25C)... The withholding period is two days after ventilation the total fumigation process requires seven to 10 days...