Thielaviopsis

 ( Microascales ) 

Thielaviopsis is a small genus of fungi in the order Microascales, and family Ceratocystidaceae. The genus includes several important agricultural Phytopathology. 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 causes root rot, also known as black root rot, which causes necrosis of the roots and stunting of the crop plants.

The genus name of Thielavia is in honour of (1796–1870), who was a German forester and landowner in Breslau.

• Thielaviopsis abuensis
• Thielaviopsis cerberus
• Thielaviopsis ethacetica
• Thielaviopsis musarum
• Thielaviopsis populi
• Thielaviopsis radicicola
• Thielaviopsis wallemiiformis

Former species; (assume family Ceratocystidaceae if not mentioned)

• T. australis = Davidsoniella australis
• T. basicola = Berkeleyomyces basicola
• T. eucalypti = Davidsoniella eucalypti
• T. euricoi = Ceratocystis euricoi
• T. neocaledoniae = Davidsoniella neocaledoniae
• T. neocaledoniae = Davidsoniella neocaledoniae
• T. ovoidea = Chalaropsis ovoidea
• T. paradoxa = Ceratocystis paradoxa
• T. paradoxa var. musarum = Thielaviopsis musarum
• T. punctulata = Thielaviopsis radicicola
• T. quercina = Ceratocystis fagacearum
• T. thielavioides = Ceratocystis paradoxa
• T. ungeri = Chalara ungeri, Pezizellaceae