Ten trial sites evaluated this accession through the 5-year evaluation period; seven sites reported on living plants for the entire 10-year period. While five sites reported that the foliage of this accession was clean all season, the Iowa site reported leaf spot damage, and a Minnesota site found slight damage from leafhoppers. Herbicidal injuries occurred to foliage at the two North Dakota sites; winter injury was reported at two Minnesota sites as well. The two North Dakota sites and the western Minnesota site at Morris recommended this accession citing fall color, growth habit, hardiness, and adaptation to alkaline soils. Six sites did not recommend this accession citing poor winter hardiness, leaf spot, general appearance of plants, and poor survival.
To browse a table that contains individual evaluations on this accession, click here .
Celtis occidentalis 'Oahe' PI476982
Six trial sites evaluated this accession through the 5-year evaluation period; three sites reported on living plants for the entire 10-year period. Four sites reported slight-to- moderate damage from leaf-sucking insects and nipple galls. Other injuries reported were moderate animal browsing and tent caterpillar damage. The Chanhassen, MN site reported deer browsing and moderate winter injury to one-year wood. The two sites from North Dakota and the Morris, MN site in the western part of that state found overall performance to be excellent and recommended the plant. These three sites commented that 'Oahe' had good tree form, was hardy, and had a large stature. A fourth site near Waseca, MN did not recommend 'Oahe' citing leaf discoloration.
To browse a table that contains individual evaluations on this accession, click here .
Populus balsamifera PI495902
Five trial sites evaluated this accession through the 5-year evaluation period; four sites reported on living plants for the entire 10-year period. While two sites found foliage to be clean all season, three reported leaf spot fungi, rust, mildew, or combinations of leaf diseases. Of those sites reporting through the 10-year period, three did not recommend the accession citing disease and pest problems and early leaf drop. The fourth site, Bismarck, ND, recommended the accession citing hardiness.
To browse a table that contains individual evaluations on this accession, click here .
Rhus aromatica subsp. serotina 'Konza' PI477981
Eleven trial sites evaluated this accession through the 5-year evaluation period; eight sites reported on living plants for the entire 10-year period. Eight sites reported that the foliage of this accession was clean all season, the Carrington, ND site reported slight damage from 2,4-D, and the Durham, NH site reported rust on leaf tips. Three North Dakota sites and the Chanhassen, MN site reported moderate-to-severe winter injury to current year's growth or to the snow line. The Ames, IA site reported good fall color. Of ten sites commenting on recommendations, six sites recommended 'Konza' citing dense, compact growth, lack of major problems, plant texture and foliage, and uniformity of habit. Three sites, Wichita, KS, Carrington, ND and Durham, NH, did not recommend 'Konza' citing poor plant form, leggy appearance, and/or defoliation from rust. The Chanhassen, MN site found the accession questionable in performance noting that a large amount of dead wood was present but the causes of this were unknown.
To browse a table that contains individual evaluations on this accession, click here .
Sambucus sibirica Ames 4961
Six trial sites evaluated this accession through the 5-year evaluation period; two sites reported on living plants for the entire 10-year period. Even with shelter, this accession would not grow at the Lincoln, NE site to the five year mark. The Madison, WI and Fort Collins, CO sites reported the foliage of this accession to be clean all season; the Durham, NH site reported damage from Japanese beetle, and the two North Dakota sites reported unsightly foliar damage from severe wilt disease. Three western sites reported red fruit and creamy flowers though not every year. The Fort Collins, CO site recommended this accession though noting its appearance was a bit leggy; the others did not recommend this accession citing the need for constant rejuvenation, possible Verticillium wilt, and iron chlorosis.
To browse a table that contains individual evaluations on this accession, click here .
Sambucus tigranii Ames 4962
Only the Absaraka (Fargo), ND site evaluated this accession for the entire 10-year evaluation period; four sites reported on living plants through the 5-year period. Four sites reported loss of all plants due to tree/shrub competition, failure in containers, and fatal winter injuries prior to the 5-year evaluation. The two North Dakota sites reported severe foliar damage from a wilt disease. These same two sites reported attractive red fruits and creamy flowers - though not every year. No sites recommended this accession citing winter dieback, form, and wilt disease.
To browse a table that contains individual evaluations on this accession, click here .
Shepherdia argentea 'Sakakawea' PI478005
Ten sites evaluated this accession through the 5-year evaluation period; nine sites reported on living plants through the 10-year period. Save the Morris, MN site, which reported a leaf spot fungus, all sites reported foliage to be clean all season. Two sites, one in Iowa and one in Minnesota, reported winter injury to the tips of twigs or to the snow line. Five western sites (two in North Dakota, and one each in Colorado, Minnesota, and Nebraska) recommended this accession citing the red fruits, silver-green foliage, hardiness, drought tolerance, uses for wildlife and xeric plantings, and lack of problems. Noting a somewhat leggy appearance, the East Lansing, MI site was undecided on whether this accession merited a recommendation. Two Minnesota sites, the Ames, IA site, and the Wichita, KS site did not recommend this accession citing poor appearance, winter injury, and/or yearly dieback.
To browse a table that contains individual evaluations on this accession, click here .
Sorbus tianshanica Ames 2819
Six sites evaluated this accession through the 5-year period; four sites reported on living plants for the entire 10-year period. The Ames, IA and Chanhassen, MN site reported failure of this accession to survive the first five years in the field due to severe drought and/or cold injuries. The Bismarck, ND site also reported moderate winter injury. Other sites reported foliar damage from insects, diseases, and iron chlorosis. Three sites reported the foliage was clean all season. The two North Dakota sites reported yellow and orange fall color; only one site, Absaraka (Fargo), ND, reported abundant, showy flowers and fruits. The Absaraka (Fargo) and Durham, NH sites recommended this accession citing plant form from spreading to narrow and upright, dense habit, and showy fruit. The Morris, MN site recommended one of two plants. Two North Dakota sites and the Lincoln, NE site did not recommend this accession citing borderline winter hardiness, winter dieback and chlorosis.
To browse a table that contains individual evaluations on this accession, click here .