Noun
fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
Source: WordNetAs of 2007, the whitebark pine is threatened by a fungus known as white pine blister rust ; however, this is mostly confined to forests well to the north and west. Source: Internet
For example, the repeating stage in white pine blister rust disease does not occur on white pines but on the alternate host, Ribes spp. Source: Internet
The incidence of blister rust on whitebark pines in Yellowstone National Park is slightly lower than in Grand Teton. Source: Internet
Though blister rust is not in itself the cause of increased mortality, its weakening effect on trees allows native pine beetles to more easily infest the trees, increasing mortality. Source: Internet