''Thielaviopsis'' is a small

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ...

in the

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Microascales The Microascales are an order of fungi in the class Sordariomycetes, subclass Hypocreomycetidae. This is a relatively small order of mostly saprobic fungi that live in soil, rotting vegetation and dung. Some species are plant pathogens, such a ...

, and family

Ceratocystidaceae The Ceratocystidaceae are a family of fungus, fungi in the class Sordariomycetes, subclass Hypocreomycetidae. Genera As accepted in 2020; (with amount of species) *''Ambrosiella'' (10) *''Berkeleyomyces'' (2) *''Bretziella'' (1) *''Ceratocys ...

. The genus includes several important agricultural

pathogens In biology, a pathogen (, "suffering", "passion" and , "producer of"), in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ. The term ...

. The most widespread is '' T. basicola'', the causal agent in several

root rot Root rot is a condition in which anoxic conditions in the soil or potting media around the roots of a plant cause them to rot. This occurs due to excessive standing water around the roots.-Hydroponics Root Rot: What is It, How To Treat It, How ...

diseases of economically important crop species including

cotton Cotton (), first recorded in ancient India, is a soft, fluffy staple fiber that grows in a boll, or protective case, around the seeds of the cotton plants of the genus '' Gossypium'' in the mallow family Malvaceae. The fiber is almost pure ...

and a variety of

vegetables Vegetables are edible parts of plants that are consumed by humans or other animals as food. This original meaning is still commonly used, and is applied to plants collectively to refer to all edible plant matter, including flowers, fruits, ...

. In cotton, ''Thielaviopsis'' causes root rot, also known as ''black root rot'', which causes

necrosis Necrosis () is a form of cell injury which results in the premature death of cells in living tissue by autolysis. The term "necrosis" came about in the mid-19th century and is commonly attributed to German pathologist Rudolf Virchow, who i ...

of the roots and stunting of the crop plants. The genus name of ''

Thielavia ''Thielavia'' is a genus of fungi in the family Chaetomiaceae. Circumscribed by German botanist Friedrich Wilhelm Zopf in 1876, ''Thielavia'' is a teleomorph of '' Myceliophthora''. Collectively, the genus is widely distributed, and according to ...

'' is in honour of (1796–1870), who was a German

forester A forester is a person who practises forest management and forestry, the science, art, and profession of managing forests. Foresters engage in a broad range of activities including ecological restoration and management of protected areas. Fores ...

and landowner in Breslau.

Species

As accepted by

Species Fungorum ''Index Fungorum'' is an international project to index all formal names (Binomial nomenclature, scientific names) in the fungus Kingdom (biology), kingdom. As of 2015, the project is based at the Royal Botanic Gardens, Kew, one of three partn ...

; *''

Thielaviopsis abuensis ''Thielaviopsis'' is a small genus of fungi in the Order (biology), order Microascales, and family Ceratocystidaceae. The genus includes several important agricultural Phytopathology, pathogens. The most widespread is ''T. basicola'', the causal ...

'' *'' Thielaviopsis cerberus'' *'' Thielaviopsis ethacetica'' *'' Thielaviopsis musarum'' *'' Thielaviopsis populi'' *'' Thielaviopsis radicicola'' *'' Thielaviopsis wallemiiformis'' Former species; (assume family

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 ''Ceratocystis paradoxa'' or Black Rot of Pineapple is a plant pathogen that is a fungus, part of the phylum Ascomycota. It is characterized as the teleomorph or sexual reproduction stage of infection. This stage contains ascocarps, or sacs/fruit ...

'' *''T. paradoxa'' var. ''musarum'' = ''Thielaviopsis musarum'' *''T. punctulata'' = ''Thielaviopsis radicicola'' *''T. quercina'' = '' Ceratocystis fagacearum'' *''T. thielavioides'' = ''

'' *''T. ungeri'' = '' Chalara ungeri'', Pezizellaceae

References

Microascales Fungal plant pathogens and diseases Sordariomycetes genera {{Microascales-stub