Diseased white pine sample, blister rust
notes: label: Description
content: This is trunk section of a diseased white pine tree donated by the USDA Bureau of Plant Industry in 1922. It displays the aecial (spring) stage of blister rust infection with the pustules of the blister rust bursting through the bark. Blister rust is a non-native disease that five species of pine, including white pine, are susceptible to. Because this is a non-native disease, pines often have lack resistance and die once infected. White pine blister ruse spores germinate onto the plant surface and grow into the pine through the stomatal openings in the needles or through a wound in the wood of the tree. The blister rust fungus then grows into the branch and the branch will swell with pustules like seen in this sample. When these blister pustules erupt, they release a bright, orange-colored material called aeciospores which infect alternate hosts.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Forestry
creditLine: label: Credit Line
content: USDA, Bureau of Plant Industry
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: AG.22FP16.04
label: catalog number
content: 22FP16.04
label: catalog number
content: W1552
label: accession number
content: 68654
objectType: label: Object Name
content: Wood Sample
label: Object Name
content: diseased white pine wood sample
physicalDescription: label: Measurements
content: overall: 9 3/4 in x 3 in x 3 in; 24.765 cm x 7.62 cm x 7.62 cm