Cotton Root Rot Fungal Mat

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. 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. It is one of the most destructive plant diseases and attacks more than 2 000 species.

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Fig 3 Spore Mat Of The Cotton Root Rot Fungus In An Alfalfa Field Courtesy Of The Arizona Agricultural Experiment Station To One Where Bacterial Wilt Is Not Present All Varieties Of Alfalfa Grown

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If you see this fungus on the soil or your tree there s a problem.

Cotton root rot fungal mat.

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. Cotton root rot control strategy for cotton. It is one of the most destructive plant diseases and attacks more than 2 000 species. The causal fungus is soilborne and has a host range of more than 1800 dicot plants.

Shred stalks moldboard plow and flat break infested areas immediately after harvest 6 to 10 inches deep. Use sufficient speed to insure good inversion of the plow slice. You can see the cottony like mats and the decay that is occuring at the base of the trunk. 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.

On grapevines it can be very devastating to growers in texas and the southwestern u s. Base the depth on equipment and horsepower of tractor. Click the following article for more information. As you may guess cotton a common crop that is grown in north texas is very susceptible to.

Grape cotton root rot is a nasty fungal disease affecting over 2 300 plant species. Map fields to define areas infested with the fungus. This is a soilborne fungus that lay dormant in the soil for many years. The fungus thrives in clay loam soil conditions where ph is between 7 0 to 8 5.

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. Cotton root rot fungal mats. Phymatotrichopsis root rot also known as cotton root rot phymatotrichum root rot texas root rot and ozonium root rot is a major fungal disease of cotton occurring within large areas of texas and arizona causing annual losses in texas alone of up to 29 million. Cotton root rot phymatotrichum omnivorum affects more then 2 000 plant species according to texas a m university.

Cotton root rot requires high heat conditions to flourish with a soil temperature of about 85 degrees f. Cotton root rot is very difficult to control.