. Response of dwarf mistletoe-infested ponderosa pine to thinning. Arceuthobium Propagation; Ponderosa pine Diseases and pests; Ponderosa pine Thinning. Q 1956 1960 1963 1968 1970 1974 Year Figure 6 —Distribution, among crown thirds, of the total dwarf mistletoe plants (7,440) growing on 54 young ponderosa pines between 1945 and 1974. Plant numbers are reported just pre- ceding stand release in 1956; when most latent dwarf mistle- toe plants had emerged after stand release in 1960; immedi- ately preceding accelerated leader elongation in 1963; when rapid leader growth had stabilized in 1968; a
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. Response of dwarf mistletoe-infested ponderosa pine to thinning. Arceuthobium Propagation; Ponderosa pine Diseases and pests; Ponderosa pine Thinning. Q 1956 1960 1963 1968 1970 1974 Year Figure 6 —Distribution, among crown thirds, of the total dwarf mistletoe plants (7, 440) growing on 54 young ponderosa pines between 1945 and 1974. Plant numbers are reported just pre- ceding stand release in 1956; when most latent dwarf mistle- toe plants had emerged after stand release in 1960; immedi- ately preceding accelerated leader elongation in 1963; when rapid leader growth had stabilized in 1968; and when data collection ended in 1970 and 1974. Data for 1974 describes dominants only. Dwarf mistletoe distribution was similar among crown classes. 0 >. Year Figure 7 —Portion of crown length above the highest dwarf mistletoe plant in intermediate, codominant, and dominant trees at six key periods of stand and parasite development.. 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 work.. Roth, Lewis F; Barrett, James W. (James Willis), 1922-. [Portland, Or. ] : U. S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station