blister rust

American  

noun

Plant Pathology.

1. a disease, especially of white pines, characterized by cankers and in the spring by blisters on the stems, caused by a rust fungus of the genus Cronartium.

---

blister rust British  

noun

1. a disease of certain pines caused by rust fungi of the genus Cronartium , causing swellings on the bark from which orange masses of spores are released

---

Etymology

Origin of blister rust

First recorded in 1915–20

Example Sentences

A nonnative fungus — white pine blister rust — has been killing whitebark pines for a century and they’ve been largely wiped out in areas.

From Seattle Times • Dec. 14, 2022

A nonnative fungus - white pine blister rust - has been killing whitebark pines for a century and they’ve been largely wiped out in areas.

From Washington Times • Dec. 14, 2022

But, in 1911, the federal government banned black currants, which carried white pine blister rust, a fungus that infected white pines and presented a threat to the timber industry.

From New York Times • Mar. 11, 2022

Many have also been killed by white pine blister rust, a fungus introduced from Europe a century ago.

From Los Angeles Times • Nov. 18, 2019

Enemies: Sucking insects forming white downy patches on the bark and twigs, the white pine weevil, a boring insect, and the white pine blister rust, a fungus, are among its principal enemies.

From Studies of Trees by Levison, Jacob Joshua