Thielaviopsis basicola is a hemibiotroph fungus that causes black root rot disease in diverse plants with significant impact on cotton production in Australia. To elucidate how T.

Cotton production is an important rural industry in Australia. Disease pressure from emerging pathogens such as Thielaviopsis basicola threatens to reduce production.

Black root rot, caused by Thielaviopsis basicola, is a significant disease threat to cotton, especially in cooler areas and seasons.

Black root rot, caused by a soilborne fungus, was first observed in Australian cotton in 1989. The disease has developed rapidly since then and now occurs in most of the cotton production area in NSW and Queensland.