Spore mat on the moist soil surface during the summer monsoon season.
Cotton root rot spore mat.
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 phymatotrichum omnivorum affects more then 2 000 plant species according to texas a m university.
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.
The fungus thrives in clay loam soil conditions where ph is between 7 0 to 8 5.
These mats vary in size from 2 to 16 inches in diameter and are white to tan colored.
Verticillium wilt sudden wilt and root rot due to excessive.
What can it be confused with.
The strands colonize the root.
Spore mats are evidence of the fungal presence but currently spores are thought to have no function in the survival infection or spread of the po fungus.
Fresh spore mat of cotton root rot fungus.
Thus cotton root rot is usually considered a warm weather disease.
This type of root rot disease is extremely difficult to control but the following information may help.
Cotton root rot requires high heat conditions to flourish with a soil temperature of about 85 degrees f.
Avoid infested locations plant non hosts or resistant species.
27 c and air temperature exceeds 104 f.
Sclerotia germinate and produce strands that grow through soil and eventually contact roots.
Spore mats and conidia.
Spore mats around infected plants.
To light tan sterile spore mat on the surface of the soil near the host but these mats are not common.
As new plant species were brought into our area plant pathogens whether native or not have found their way in to our landscape as well.
Phymatotrichum root rot also known as cotton root rot or texas root rot is caused by the soil borne fungus.
The fungus attacks more than 2 000 species of broadleaf plants but does not affect monocots grasses.
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 often forms spore mats on the soil surface during warm rainy weather.
Phymatotrichum root rot also known as cotton root rot and texas root rot is caused by the fungus phymatotrichopsis ominvorum.
Grape cotton root rot is active in the summer months when soil temperatures are at least 80 f.
One disease that has over 2 300 host species 1 800 dicots is known as phymatotrichopsis omnivora also referred to as cotton root rot texas root rot and ozonia root rot.
40 c usually in the months of august and september.
Rapid wilting and death occurs in hot weather due to the inability of the host plant to take up enough water through its rotted roots.
