Fungal threads on roots spore mats around infected plants.
Cotton root rot fungal spore mat.
Spore mats and conidia.
You can see the cottony like mats and the decay that is occuring at the base of the trunk.
These mats vary in size from 2 to 16 inches in diameter and are white to tan colored.
The disease has afflicted the cotton industry for more than 100 years.
Cotton root rot has been reported in texas counties from the red river to the rio grande and from tom green county to the neches river.
Alkaline soils soils low in organic matter.
The fungus attacks more than 2 000 species of broadleaf plants but does not affect monocots grasses.
Survival structures produced in soil away from the host roots.
It is one of the most destructive plant diseases and attacks more than 2 000 species.
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.
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.
Sclerotia germinate and produce strands that grow through soil and eventually contact roots.
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.
Fresh spore mat of cotton root rot fungus.
If you see this fungus on the soil or your tree there s a problem.
The strands colonize the root.
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.
Avoid infested locations plant non hosts or resistant species.
A unique feature of this disease is the production of spore mats that may form on the soil surface near dead.
Cotton root rot fungal mats.
Cotton root rot is a soilborne disease caused by the fungi phymatotrichum omnivorum cotton texas root rot.
Phymatotrichum root rot also known as cotton root rot and texas root rot is caused by the fungus phymatotrichopsis ominvorum.
Phymatotrichum root rot also known as cotton root rot or texas root rot is caused by the soil borne fungus.
Fresh spore mat of cotton root rot fungus.
