Recent rainfall has come too late to ease the drought and frost that rural analysts say is the cause of  Australia’s worst winter harvest in a decade.

Western Australia will provide over half of the national winter crop, and is the only State stopping the harvest from slipping to a 20-year low.

NSW Farmers' Grains Committee chair Matthew Madden said growers are worried their “reputation” will be “jeopardised in [the] rush to import grain from other states and overseas.”