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Evaluation of Four Herbicides and Tillage for Weed Control on 1-0 Planted Tree Seedlings

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Azafenidin, sulfometuron, pendimethalin, and simazine were applied alone and in combination to 1-0 seedlings of nine hardwood and one conifer species. Percent bare ground at 30, 60, and 90 days, diameter and height growth of the seedlings were determined for 16 herbicide treatments, tillage and a control. Azafenidin applications alone and in combination with sulfometuron resulted in about 85% bare ground 90 days post-treatment. There were significant differences for diameter, height growth, and volume among the treatments for every species. No single treatment ranked best for all species, but comparison of the mean ranks of the treatments for all species indicated that azafenidin and pendimethalin resulted in the most growth. Azafenidin-treated seedlings also had the greatest volume at the end of the season.

Keywords: Siberian crabapple; Weed control; black cherry; black walnut; eastern white pine; flowering dogwood; hardwood; northern bayberry; red oak; white ash; white oak; yellow poplar

Document Type: Miscellaneous

Affiliations: 1: Department of Forestry and Natural Resources, Purdue University, PO Box 216 Butlerville, IN, 47223, 2: USDA Forest Service, North Central Research Station, Hardwood Tree Improvement and Regeneration Center, Department of Forestry and Natural Resources, Purdue University, 1159 Forestry Building, West Lafayette, IN, 47907,

Publication date: 2002-09-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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