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Soil Spot Herbicides for Single-Stem Hardwood Control

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Abstract:

Soil spot treatments of undiluted VelparĀ® L and a concentrated mixture of SpikeĀ® 80W were applied around test trees of five hardwood species. The test rates were 2, 4, and 6 ml of herbicide/in. of dbh applied to the soil within 3 ft of each tree Hardwood topkill was assessed after two growing seasons. The 4-ml rate of Velpar L was required to achieve 80% or greater average topkill of sweetgum (Liquidambar styraciflua) and water oak (Quercus nigra) on loamy soils, while a 6-ml rate was needed to exceed 80% topkill of dogwood (Cornus florida). Spike 80W gave about 80% topkill of both water oak and dogwood at the 2-ml rate but was ineffective on sweetgum. Only Spike 80W at the 6-ml rate yielded greater than 70% average topkill of boxelder (Acer negundo) and hophornbeam (Ostrya virginiana). Nearby hardwoods of susceptible species within 3 ft of treated trees were also killed, extending the cost-effectiveness of these hardwood control treatments. South. J. Appl. For. 12(3):199-203.

Document Type: Journal Article

Affiliations: USDA Forest Service, Southern Forest Experiment Station, the George W. Andrews Forestry Sciences Laboratory, Auburn, AL 36849

Publication date: August 1, 1988

More about this publication?
  • 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 Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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