Alternaria is a genus of ascomycete fungi.
Alternaria species are known as major plant pathogens.
There are 299 species in the genus they are ubiquitous in
the environment and are a natural portion of fungal flora
almost everywhere. The club shaped spores are single or
form long chains. So Main objective of this investigation
is to isolate different Alternaria species from
different portions of plant and diagnosed their species.
They are standard agents of decay and decomposition. At
least 20% of agricultural spoilage is triggered by
Alternaria species not all Alternaria species are pests and
pathogens; some have listed promise as biocontrol agents
against invasive plant species. The genus is now known to
be polyphyletic. Alternaria alternate generates early
blight of potato, leaf spot disease in Withania somnifera
and can infest several alternative plants. Alternaria
abrorescens generates stem cancer of tomato, Alternaria
arbsti causes Leaf lesions on Asian pear, Alternaria
blumeae generates cessions on Blumea aurita, Alternaria
brassicae infests numerous vegetables and roses.
Alternaria carotiinculate generates leaf blight on corrot,
Alternaria citri generates black rot on citrus plants.
Alternaria cucumerina grows on multiple cucurbits,
Alternaria infectoria infests Wheat, Alternaria
solani generates early blight in potatoes and tomatoes.
Alternaria toxins are mycotoxins fabricated by Alternaria
species. The genus Alternaria
currently encompasses around 50 species. At the cellular
level. Toxins are fabricated by AAL that
are necessary for pathogenicity on tomato. The fungus
lives in seeds and seedlings and is also spread by spores.
The disease flourishes in dead plants that have been left
in dead plants that have been left in gardens over winter.
There are no insect vectors for this disease.