'''Thielaviopsis''' is a small
genus of
fungi in the
order Microascales. The genus includes several important
agricultural pathogens. The most widespread is ''T. basicola'', the causal agent in several root rot diseases of economically important crop species including
cotton and a variety of
vegetables. In cotton, ''Thielaviopsis'' root rot, also known as black root rot causes necrosis of the roots and stunting of the crop plants.
References
NCBI Taxonomy browser