Some species include:
Alternaria alternata – Causes early blight of potato, Leaf spot disease in Withania somnifera and can infest many other plants.
It also causes upper respiratory infections in AIDS patients, asthma in people with sensitivity, and has been implicated in chronic rhinosinusitis.

Alternaria alternantherae
Alternaria arborescens – causes stem canker of tomato
Alternaria arbusti – causes leaf lesions on Asian pear
Alternaria blumeae – causes lesions on Blumea aurita
Alternaria brassicae – infests many vegetables and roses
Alternaria brassicicola – grows on cole crops
Alternaria burnsii – causing cumin blossom blight
Alternaria carotiincultae – causes leaf blight on carrot
Alternaria carthami
Alternaria celosiae
Alternaria cinerariae
Alternaria citri – causes black rot on citrus plants
Alternaria conjuncta – grows on parsnip
Alternaria cucumerina – grows on various cucurbits
Alternaria dauci – grows on carrot
Alternaria dianthi
Alternaria dianthicola
Alternaria eichhorniae – infests water hyacinth plants, used as bioherbicide against these weeds
Alternaria euphorbiicola – infests cole crops
Alternaria gaisen – causes ringspot disease of pear
Alternaria helianthi
Alternaria helianthicola
Alternaria hungarica
Alternaria infectoria – infests wheat
Alternaria japonica – infests cole crops
Alternaria limicola – earliest diverging lineage of Section Porri
Alternaria linicola
Alternaria longipes – infects tobacco
Alternaria mali
Alternaria molesta – may cause skin lesions on porpoises
Alternaria panax – causes ginseng blight
Alternaria perpunctulata
Alternaria petroselini – causes parsley leaf blight
Alternaria porri
Alternaria radicina – causes carrot decay
Alternaria raphani
Alternaria saponariae
Alternaria selini – causes parsley crown decay
Alternaria senecionis
Alternaria solani – causes early blight in potatoes and tomatoes
Alternaria smyrnii – infests alexanders and parsleys
Alternaria tenuissima
Alternaria triticina
Alternaria zinniae
Some species include:
Alternaria alternata – Causes early blight of potato, Leaf spot disease in Withania somnifera and can infest many other plants. It also causes upper respiratory infections in AIDS patients, asthma in people with sensitivity, and has been implicated in chronic rhinosinusitis.
Alternaria alternantherae
Alternaria arborescens – causes stem canker of tomato
Alternaria arbusti – causes leaf lesions on Asian pear
Alternaria blumeae – causes lesions on Blumea aurita
Alternaria brassicae – infests many vegetables and roses
Alternaria brassicicola – grows on cole crops
Alternaria burnsii – causing cumin blossom blight
Alternaria carotiincultae – causes leaf blight on carrot
Alternaria carthami
Alternaria celosiae
Alternaria cinerariae
Alternaria citri – causes black rot on citrus plants
Alternaria conjuncta – grows on parsnip
Alternaria cucumerina – grows on various cucurbits
Alternaria dauci – grows on carrot
Alternaria dianthi
Alternaria dianthicola
Alternaria eichhorniae – infests water hyacinth plants, used as bioherbicide against these weeds
Alternaria euphorbiicola – infests cole crops
Alternaria gaisen – causes ringspot disease of pear
Alternaria helianthi
Alternaria helianthicola
Alternaria hungarica
Alternaria infectoria – infests wheat
Alternaria japonica – infests cole crops
Alternaria limicola – earliest diverging lineage of Section Porri
Alternaria linicola
Alternaria longipes – infects tobacco
Alternaria mali
Alternaria molesta – may cause skin lesions on porpoises
Alternaria panax – causes ginseng blight
Alternaria perpunctulata
Alternaria petroselini – causes parsley leaf blight
Alternaria porri
Alternaria radicina – causes carrot decay
Alternaria raphani
Alternaria saponariae
Alternaria selini – causes parsley crown decay
Alternaria senecionis
Alternaria solani – causes early blight in potatoes and tomatoes
Alternaria smyrnii – infests alexanders and parsleys
Alternaria tenuissima
Alternaria triticina
Alternaria zinniae
Alternaria