What does Cryphonectria parasitica cause?
Disease symptoms Cryphonectria parasitica causes perennial necrotic lesions (so-called cankers) on the bark of stems and branches of susceptible host trees, eventually leading to wilting of the plant part distal to the infection.
What causes chestnut blight?
chestnut blight, plant disease caused by the fungus Cryphonectria parasitica (formerly known as Endothia parasitica). Accidentally imported from Asia, the disease was first observed in 1904 in the New York Zoological Gardens.
Which fungus affects the American chestnut fungus affects the American chestnut?
Chestnut blight is caused by the fungus Cryphonectria parasitica and infects American chestnut trees (Castanea dentata) throughout the United States and Canada. Once a major tree species, American chestnut trees filled Eastern and Midwestern forests.
What is the disease affecting horse chestnut trees?
Bleeding canker is a disease of horse chestnut trees (Aesculus hippocastanum). It affects trees of all ages and produces external and internal symptoms. Ultimately the disease can lead to tree death, but trees can also have periods of remission and even recover.
How can chestnut blight be controlled?
Plant Disease 67:757-758. Chestnut trees with blight cankers can be cured with mud packs applied to each canker, or protected with a biological control based on a virus that keeps the blight fungus from killing trees.
What organism infected and killed the American chestnut tree?
Chestnut blight, caused by Cryphonectria parasitica, is a devastating disease infecting American and European chestnut trees. The pathogen is native to East Asia and was spread to other continents via infected chestnut plants.
What happened to the American chestnut?
Mature American chestnuts have been virtually extinct for decades. The final blow happened at the turn of the 20th century when a disease called chestnut blight swept through Eastern forests. The disappearance of the chestnut launched a profound change in the structure and composition of eastern forests.
Are there viruses that infect fungi?
Mycoviruses are viruses that infect fungi and replicate in fungi. However, the host range of mycoviruses is not likely to be restricted to fungi in the future since more and more mycoviruses are found to be closely related to other viruses that do not infect fungi.