Powdery mildew diseases are caused by many
different species of fungi in the
order Erysiphales
Retrieved From: http://en.wikipedia.org/wiki/Powdery_mildew
Black spot will cause a general weakening of
the plant so that progressively fewer and
fewer blooms are formed if the disease is left
unchecked. Plants so weakened are
increasingly subject to winter injury.
Retrieved From :
http://pmo.umext.maine.edu/factsht/Spotrose.htm
Botrytis is a necrotrophic fungus that affects
many plant species, although its most notable
hosts may be wine grapes. In viticulture, it is
commonly known as botrytis bunch rot;
in horticulture, it is usually called grey
mould or gray mold.
Retrieved From: http://en.wikipedia.org/wiki/Botrytis_cinerea
Damping off is the term used for a number of
different fungus-caused ailments which can
kill seeds or seedlings before or after
they germinate.
Retrieved From: http://en.wikipedia.org/wiki/Damping_off
Phytophthorais morphologically very similar
to true fungi yet its evolutionary history is
quite distinct. In contrast to fungi,
stramenopiles are more closely related to
plants than animals.
Retrieved From: http://en.wikipedia.org/wiki/Phytophthora
Rhizoctonia is a plant pathogenic fungus with
a wide host range and worldwide distribution.
It is one cause of the condition known
as damping off, which is a cause of death of
seedlings in agriculture. It is also responsible
for wire stem, a disease of cabbage,
cauliflower and related plants that is similar to
damping off but attacks older seedlings and
produces a constricted, wiry stem.
Retrieved From :http://en.wikipedia.org/wiki/Rhizoctonia_solani
INVS is a plant pathogenic virus of the
family Bunyaviridae. It was originally believed
to be another strain of Tomato spotted wilt
virus but genetic investigations revealed them
to be separate viruses. It has a
tripartategenome and is largely spread by
the insect vector of the western flower thrip.
Retrieved From: http://www.freebase.com/view/en/impatiens_necrotic_spot_virus
Tomato spotted wilt virus is a plant virus vectored by
at least 8 species of thrips Two species in particular,
Western flower thrips, and tobacco thrips, are
common vectors in multiple crop systems in the
southeastern US.
Retrieved From: http://www.caes.uga.edu/topics/diseases/tswv/
Pythium is a genus of parasitic oomycete.
Because this group of organisms were once
classified as fungi, they are sometimes still
treated as such.
Retrieved From: http://en.wikipedia.org/wiki/Pythium
Thielaviopsis is a small genus of fungi in
the order Microascales. The genus includes
several important agricultural pathogens. The
most widespread . the causal agent in several
root rot diseases of economically important
crop species including cotton and a variety of
vegetables
Retrieved From: http://en.wikipedia.org/wiki/Thielaviopsis
Cedar-apple rust is one of several similar
fungal diseases which could be broadly
classified as Juniper-Rosaceous rusts
Retrieved From: http://plantclinic.cornell.edu/FactSheets/cedarapplerust/cedar-applerust.htm
Daily lily Rust a new disease to the United
States. The pathogen was first described in
1880. It is native to Asia, commonly found in
China, Japan, Korea, Taiwan, and Russia.
Retrieved From:
http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1781&context=extension
hist
Fire blight is the enemy of rosebushes and apple
and pear trees. It is caused by a bacteria which
attacks starting generally from the blossoms or
flowers and moving up to the twigs and then the
branches.
Retrieved From: http://www.fireblight.com/
Anthracnose diseases of hardwood trees are
widespread throughout the Eastern United
States. The most common symptom of these
diseases is dead areas or blotches on the
leaves. Because of the brown and black,
scorched appearance of the leaves, the
diseases are sometimes called leaf blight.
Retrieved From: http://www.na.fs.fed.us/spfo/pubs/fidls/anthracnose_east/fidl-ae.htm
A bacterial disease of plants characterized by
spotty discolorations on the leaves; examples
are angular leaf spot and leaf blotch.
Retrieved From: http://www.answers.com/topic/bacterial-leaf-spot
Retrieved From:
http://en.wikipedia.org/wiki/Chloroph
yll
Chlorosis is a condition in which leaves
produce insufficient chlorophyll.
Retrieved From:
http://en.mimi.hu/environment/necrosis.ht
ml
Death of plant or animal cells or
tissues. In plants, necrosis can discolor
stems or leaves or kill a plant entirely.