If you see this fungus on the soil or your tree there s a problem.
Cotton root rot fungal spore mat.
A unique feature of this disease is the production of spore mats that may form on the soil surface near dead.
Cotton root rot caused by the fungus phymatotrichum omnivorum also is known by several other names such as phymatotrichum root rot texas root rot and ozonium root rot.
Fresh spore mat of cotton root rot fungus.
Cotton root rot is a soilborne disease caused by the fungi phymatotrichum omnivorum cotton texas root rot.
The strands colonize the root.
Phymatotrichum root rot also known as cotton root rot and texas root rot is caused by the fungus phymatotrichopsis ominvorum.
Avoid infested locations plant non hosts or resistant species.
Factors affecting the disease and fungal survival this fungus can survive many years in soil as sclerotia which can occur at depths of 7 feet.
Sclerotia germinate and produce strands that grow through soil and eventually contact roots.
Cotton root rot also known as texas root rot and by its scientific name phymatotricum root rot is caused by the the soil borne fungus phymatotrichum omnivorum and is responsbile for serious and usually fatal root rots on more than 2 300 species of plants.
The fungus attacks more than 2 000 species of broadleaf plants but does not affect monocots grasses.
Alkaline soils soils low in organic matter.
Spore mats and conidia.
Cotton root rot typically occurs in specific geographies in the southwestern united states and is found in arizona california texas new mexico and oklahoma cotton root rot is prevalent in calcareous alkaline.
The disease has afflicted the cotton industry for more than 100 years.
It is one of the most destructive plant diseases and attacks more than 2 000 species.
These mats vary in size from 2 to 16 inches in diameter and are white to tan colored.
Fresh spore mat of cotton root rot fungus.
The fungus often forms spore mats on the soil surface during warm rainy weather.
You can see the cottony like mats and the decay that is occuring at the base of the trunk.
Factors affecting the disease and fungal survival this fungus can survive many years in soil as sclerotia which can occur at depths of 7 feet.
Cotton root rot fungal mats.
Fungal threads on roots spore mats around infected plants.
In this photo we wanted to show you what the sporemats of cotton root rot looks like when they emerge on the soil or tree surface.
