magnesium, potassium, and nitrogen. 12 p. Schier, George A., and Robert B. Campbell. vandalism by recreationists has caused aspen to deteriorate in
Meyer, J. F., and G. H. Fechner. The disease is most
and moose, frequently seriously damage reproduction by browsing
further damage (35,78).
You've already signed up for some newsletters, but you haven't confirmed your address. chokecherry, common juniper (Juniperus communis), creeping
secondary growth (78). Nevertheless, P. tremuloides, P. tremula, and
The effect of age and site index on aspen suckering
Now and in the foreseeable future, most aspen will be extensively
however. produced an estimated 1.6 million seeds (51,59,78). closely with the northern limit of the species (51,69, 70,78,80). Furthermore, female clones had faster radial growth
apparent clone disturbance (51,82). tremuloides or P. x smithii so the true
Trembling Aspen flower buds, just starting to swell, in mid-March. aspen compared to conifers (34). A. occurrence coincides roughly with a mean annual temperature of 7°
Silvae Genetica 7:98-102.
bruceata, and Lobophora nivigerata. leaves during the summer months (78).
male-to-female ratios of about 3 to 1 in natural populations;
Trembling Aspen flower buds, just starting to swell, in mid-March. roots. ), highbush cranberry (Viburnum edule), limber
Pure aspen stands gradually deteriorate
of phenology and growth of Michigan and western North
14.6 m³/ha (208 ft³/acre) of bolewood over 38 years
Powdery mildew, Erysiphe cichoracearum in the West and the
Peniophora polygonia is the second most important trunk
genetic variability does not exist
A., and Edward Hacskaylo. drought- stressed trees become predisposed to secondary agents
Saying no will not stop you from seeing Etsy ads, but it may make them less relevant or more repetitive. U.S. Department of Agriculture,
killed, but older ones rarely die.
Apical dominance by elongating suckers
Spruce-Aspen (Type 251).
Increased breakage accelerates the deterioration
During the first several years,
Aspen is susceptible to three types of rough-bark which are caused
roots and thereby reduce sucker regeneration (19,56,78).
We've sent you an email to confirm your subscription. Aspen has gained acceptance in the construction market as studs, and its bright white colour is well suited to appearance applications.
Range map for Trembling Aspen (Populus tremuloides). and chemical properties of soil. Learn more. Snow creep on steep slopes can bend or break aspen suckers as
These preexisting primordia are visible as small
This North American native tree grows best in U.S. Department of Agriculture plant hardiness zones 1 through 8. affecting suckering. Fort Collins, CO. 5 p. Sepik, Greg F., Ray B. Owen, Jr., and Malcolm W. Coulter.
Sm. Water also serves as a dispersal agent (78,91).
fire, frost, suppression, or leaf diseases.
Development is poor on physiographic positions with
Agriculture Handbook 410. 1976. guide. Pole-size trees are more susceptible than saplings (19,58). The seeds, buoyed by
Flowers - dioecious, male and female hanging catkins 1 to 3 inches long. defoliators, borers, and sucking insects. Forest
growing at a longer day-length and had heavier root systems than
variable characteristic and self-pruned and unpruned clones exist
This deciduous tree belongs to the willow family.
Balsam poplar is used for pulp and construction, and black cottonwood is used to make tissues and other paper products. Comparisons
for making and interpreting soil surveys. regarded as transient. Defoliators of aspen belong primarily to the orders Lepidoptera
1976. feeder roots substantially reduce aspen productivity.
for wildlife in the Southwest. Jones, John R. 1974. much as one-third of the decay volume in Colorado. clone are indistinguishable but can be distinguished from those
Natural hybrids between the European Populus alba and
1986. Please. Morphological variation of families of trembling aspen in
1981. aspen in western North America.
At the eastern end of the range, in the Maritime Provinces of
account in part for the aspen invasion of grassland without
Experiment Station, Miscellaneous Report 253. U.S. Department of Agriculture, Soil Conservation Service.
Excessive use and
than in the East, hence pathological rotations are longer-80 to
More typically, mature stands may range from 20 to 25 in (66 to
a threshold temperature 5.6° C (42° F) coincides
trees of all sizes. Sometimes suckers appear
The poplar branch borer (Oberea schaumi) attacks
also damage pole- and saw log-size trees by "barking"
St. Paul. 1971. identification of clones in trembling aspen. The Michigan
Forest Research Information Paper 10 1. carpenter ants (Camponotus pennsylvanicus) frequently use
Clone size in an aspen stand is primarily a function of clone
(Diervilla lonicera), raspberries and blackberries (Rubus
Mature stands in Newfoundland typically carry 64 m²/ha
The more common leaf miners of aspen are aspen leaf miner (Phyllocnistis
eastward to northwestern Minnesota and south to Iowa where high
undergone selection leading to better adaptation to local
the better sites in the Lake States and Canada culminates at
Hybrid aspens in the Lower
Westell, Jr. 1963. increases with tree age or size but is not strongly related to
cytokinins accumulate in the roots, the supply of inhibitory
crotchi), the cottonwood leaf beetle (C. scripta), the
Washington, DC. Intermountain Forest and Range Experiment Station,
Water relations of the aspens. (7,78,81). seed dispersal may last from 3 to 5 weeks. adventitious shoot development in aspen roots. suckers until they emerge at the soil surface to carry on their
A clear-wing moth of the genus Aegeria, and willow shoot
90 years in Utah and 110 to 120 years for Colorado and Wyoming. flammability and make excellent firebreaks. induced morphological and chemical responses of a quaking
fiberboard, pulpwood, flakeboard, and some sawtimber. initiate adventitious shoot development.