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Black Alder Seedlings Demonstrate Tolerance to Preemergence Herbicides in Preliminary Trials

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Seven preemergence herbicides, atrazine, metolachlor, napropamide, oryzalin, oxadiazon, oxyfiuorfen, and simazine, were screened for phytotoxic effects on newly planted black alder seedlings. All treatments containing atrazine significantly reduced seedling survival, as did simazine treatments greater than 3.4 kg/ha. The simazine rate of 3.4 kg/ha, the napropamide rate of 26.9 kg/ha, and metolachlor rates greater than 3.4 kg/ha temporarily stunted seedling height growth early in the first growing season. Temporary stunting was also observed for the highest rates of the granular and emulsifiable concentrate formulations of oxyfluorfen, 9.0 and 4.5 kg/ha respectively. However, those treatments that temporarily stunted height growth had no significant effect on seedling survival. Excluding atrazine, all of the preemergence herbicides evaluated in this study could be safely applied to newly planted black alder seedlings with no significant mortality or growth inhibition, providing the rate guidelines previously mentioned are observed. North. J. Appl. For. 3:76-79, June 1986.
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Document Type: Journal Article

Affiliations: School of Forest Resources and Department of Horticulture, The Pennsylvania State University, University Park 16802

Publication date: 1986-06-01

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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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