Photograph, forester examining tree
notes: label: Description
content: This photograph, donated in 1922 by the Office of Blister Rust Control of the US Department of Agriculture’s Bureau of Plant Industry, displays forester examining a pine tree. This photograph was donated alongside samples of white pine trees afflicted with blister rust. 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. 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
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: AG.22FP16.XX [dup3]
label: catalog number
content: 22FP16.XX
label: catalog number
content: W1545
label: accession number
content: 068654
objectType: label: Object Name
content: Photograph: Forester Examining Tree
physicalDescription: label: Measurements
content: overall: 10 in x 8 in; 25.4 cm x 20.32 cm