Fungus Fact Friday

Tagged: disease

#127: Ophidiomyces ophiodiicola, causal agent of Snake Fungal Disease 2

Fungus Fact

#127: Ophidiomyces ophiodiicola, causal agent of Snake Fungal Disease

Snakes of the Eastern United States are dying of a disease called Snake Fungal Disease (SFD). Recently, the cause of SFD was identified as the fungus Ophidiomyces ophiodiicola.  This fungus normally contributes to the decomposition of dead animals, but has for some reason been infecting live snakes since the early 2000’  SFD is primarily characterized by a severe rash on the snake’s skin, although it may also affect the snake’s eyes or even liver.  The infection often results in death and in some species the mortality rate appears to be 100%.

#115: Neotyphodium coenophialum, Tall Fescue Endophyte 1

Fungus Fact

#115: Neotyphodium coenophialum, Tall Fescue Endophyte

This fungus spends its entire life inside Tall Fescue, a common livestock feed grass. While it is beneficial to the plant, it makes animals that feed on the grass sick.  In the United States, the fungus costs the beef industry from $600 million to $1 billion or more every year.

#113: Moniliophthora perniciosa, Witches’ Broom Disease of Cacao Trees 1

Fungus Fact

#113: Moniliophthora perniciosa, Witches’ Broom Disease of Cacao Trees

Witches might not be real, but witches’ brooms certainly are – and they’re destroying chocolate! Yes, Halloween’s favorite treat (chocolate) is suffering at the hands of a disease with a Halloween-themed name: Witches’ Broom Disease.  Witches’ brooms are actually fairly common and occur on many different plants.  In chocolate trees (Cacao trees, Theobroma cacao, whose genus name literally means “food of the gods”), witches’ brooms are caused by the fungal pathogen Moniliophthora perniciosa and have an enormous economic impact on chocolate production in Central and South America.

#107: The Banana and Fusarium oxysporum f. sp. cubense 2

Fungus Fact

#107: The Banana and Fusarium oxysporum f. sp. cubense

The banana that you know and love may soon be a thing of the past. I know, you probably think that I’m exaggerating the threat to this ubiquitous crop, but the possibility of bananas disappearing from grocery shelves forever is very real.  In fact, it nearly happened once before.  Here is a brief history of the modern banana: in the 1950’s, bananas were wiped out by a disease called Panama Disease.  To save the crop, a resistant variety was discovered.  Today, Panama Disease has evolved to attack the resistant variety, thus threatening to decimate banana production for a second time.  This time, however, there is not a fallback option.

#096: The Great Famine of Ireland and Phytophthora infestans 0

Fungus Fact / That's Not A Fungus!

#096: The Great Famine of Ireland and Phytophthora infestans

In celebration of Independence Day, I have decided to discuss a fungus-related event which significantly impacted the history of the United States (Don’t worry; I will get to the remaining mushroom toxins in the next few weeks). America is a country of immigrants, so on the day that we celebrate the founding of our country, it only seems fitting that we take a moment to remember how immigration has shaped our history.

#082: Biscogniauxia atropunctata 0

Fungus Fact

#082: Biscogniauxia atropunctata

This fungus is one of a number of ascomycetes that form hard, flat fruiting surfaces on dead or dying hardwood trees. Most fungi with this fruiting habit are black, making the tree appear as though it were burned in discrete spots.  However, at a certain stage in its fruiting body development, Biscogniauxia atropunctata is light gray or white and covered in small, black dots.

#068: Frosty Pod Rot Disease of Cacao Trees 1

Fungus Fact

#068: Frosty Pod Rot Disease of Cacao Trees

Frosty Pod Rot, caused by the fungus Moniliophthora roreri, is one of the most significant pathogens of cacao trees (Theobroma cacao). The disease has been around a long time: it was first recognized in Ecuador in 1917 and first described in 1933.  roreri likely evolved in Columbia, where the greatest diversity of the species is located and where cultivated cacao trees grow near closely related trees.  Up until the 1950’s, Frosty Pod Rot was limited to northwestern South America.  Since then, it has spread throughout Central America and into Peru and Venezuela.  In these areas, Frosty Pod Rot is the most destructive cacao disease, resulting in the loss of about 30-40% of total production.  The disease has not yet made it to Asia or Africa, where most of the world’s chocolate is produced, but it may just be a matter of time.

#061: Ergot of Rye, Claviceps purpurea 2

Fungus Fact

#061: Ergot of Rye, Claviceps purpurea

Imagine for a moment that it is the late 17th century and you live in rural America.  Your day starts off like any other day: you wake up, have breakfast, and begin working on your farm.  However, before too long your daughter starts behaving oddly.  At first she just seems agitated, but her symptoms quickly escalate.  She convulses, hides under the table, yells unintelligibly, and complains of a prickly sensation in her arms and legs.  Terrified, you call for the town doctor.  The doctor has never seen a disease like this before and cannot find anything physically wrong with your daughter.  After a while, he comes up with the only possible cause: witchcraft.  Just then, one of your neighbors bursts in, looking for the doctor.  His daughter has been exhibiting the same symptoms!  You look at his frightened face and realize what you have to do: in order to protect...

#049: Coffee Rust [Archived] 1

Archived

#049: Coffee Rust [Archived]

Note: This is an archived post. You can find the current version of this post here. Coffee Rust (la roya in Spanish) is a disease of coffee plants that is caused by the fungus Hemileia vastatrix. If you enjoy a fine cup of coffee, then this is one fungus you should be very interested in.  The Coffee Rust is currently ravaging coffee trees in Central America, where 60% to 75% of the region’s crops are infected with the pathogen.  The result of this has been a 15% drop in Central America’s coffee output and a corresponding loss of more than 100,000 jobs over the last two years.  The high-end Arabica trees are particularly susceptible to the disease.  America’s major coffee producers have been able to find enough coffee to meet demand without a noticeable impact on price*, but smaller, specialty brewers are having a harder time.  And we haven’t seen...