. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. BLISTER RUST RESISTANCE OF WHITE PINES IN EUROPE 235. YEARS 10 YEARS 12 3 4 5 1 12 3 4 5 15 YEARS 16 12 3 4 5 12 3 4 5 INFECTION CLASS 12 3 4 5 Figure 1. Degrees of infection of seedlings of Pinus strobus at various ages by Cronartium. ribicola: seed collection Infection classes: l--healthy (not infected), 2--healthy (previous infections were defeated), 3--branch infection only, 4--stem infections, Please note that these
. Biology of rust resistance in forest trees : proceedings of a NATO-IUFRO advanced study institute, August 17-24, 1969. Trees; Pine; Trees; Rust diseases. BLISTER RUST RESISTANCE OF WHITE PINES IN EUROPE 235. YEARS 10 YEARS 12 3 4 5 1 12 3 4 5 15 YEARS 16 12 3 4 5 12 3 4 5 INFECTION CLASS 12 3 4 5 Figure 1. Degrees of infection of seedlings of Pinus strobus at various ages by Cronartium. ribicola: seed collection Infection classes: l--healthy (not infected), 2--healthy (previous infections were defeated), 3--branch infection only, 4--stem infections, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original North Atlantic Treaty Organization; International Union of Forestry Research Organizations; United States. Forest Service; University of Idaho. Washington, D. C. : Forest Service
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Keywords: ., bookauthoruni, bookcentury1900, booksubjectpine, booksubjecttrees
