White pine blister rust
, present in a number of European countries as well as the United States, was first discovered in the United States around 1919, according to the American Phytological Society.
Don) indicated that pruning to only an 8-foot height could significantly reduce white pine blister rust
infections (Weber 1964; Lehrer 1982; Hungerford et al.
Several currant cultivars on trial at Corvallis show no signs of white pine blister rust
under natural conditions," says Hummer.
Add in white pine blister rust
and the picture becomes even bleaker: "The Glacier/Waterton Lakes area is disturbing," Dr.
Working at American Forests, there is something I can do to help these forests survive the twin threats they're facing--an invasive disease, white pine blister rust
, and a scourge of insects, mountain pine beetle.
The Clark's nutcracker is the primary seed disperser of the pine, but as whitebark pine populations decline due to other factors, such as mountain pine beetle and white pine blister rust
, the Clark's nutcracker might move on to other pine trees as a food source, causing whitebark pine numbers to diminish further.
Today, however, sugar pines account for less than five percent of the area's forest composition due to white pine blister rust
The GYA pilot project addresses a combination of threats -- white pine blister rust
, mountain pine beetles and climate change -- that are jeopardizing the health of western high-elevation forests.
Fish and Wildlife Service determination that listing the whitebark pine is "warranted," as this high-lights the, imminets risks Facing the species duo to climate change, wildfire suppression policy, mountain pine beetles, white pine blister rust
, and other factors.
As of this year, estimates indicate that as much as 77 percent of the whitebark pine community stretching from Canada to the California Sierras may be succumbing to white pine blister rust
, mountain pine beetle infestation, or some combination of the two.
White pine blister rust
is killing off whitebark pines throughout the Intermountain West; the majestic trees are further threatened by mountain pine beetles.
Throughout these areas trees are failing to recruit naturally while, at the same time, many are dying due to mountain pine beetle infestation and imported white pine blister rust