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Broadcast Applications of Glyphosate Control Nutsedge at a South Georgia Forest Tree Nursery

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Abstract:



Nutsedge is a major weed problem in some southern forest tree nurseries. Although herbicides can control most weeds in nurseries, control of nutsedge is usually dependent on fumigation. The purpose of this study was to examine the effectiveness of broadcast applications of glyphosate for control of nutsedge. Single and multiple applications of glyphosate at 2.2 kg ai/ha greatly reduced the density of nutsedge shoots and viable tubers at a south Georgia forest tree nursery. The first application in June 1999 reduced nutsedge shoots by approximately 98%. Subsequent applications during September and October 1999 had no additional detectable effect. Although applications in August and September 2000 greatly reduced the amount of nutsedge in previously untreated areas, their effect did not appear to be as great as glyphosate applications during the first year. Rainfall before and after glyphosate applications, and plant age at the time of application may have influenced the level of nutsedge control in year two. Nutsedge shoots and viable tubers were reduced to near zero levels in plots treated over a 2 yr period. The use of broadcast applications of glyphosate may be of value in developing a more cost-effective management program for nutsedge control in southern forest tree nurseries. South. J. Appl. For. 27(3):176–179.

Keywords: Cyperus spp.; Glyphosate; environmental management; forest; forest management; forest resources; forest tree nurseries; forestry; forestry research; forestry science; natural resource management; natural resources; nutsedge; weed control

Document Type: Miscellaneous

Affiliations: 1: Southern Research Station, USDA Forest Service, 320 Green Street, Athens, GA, 30602, 2: Forest Health Protection, USDA Forest Service, 320 Green Street, Athens, GA, 30602,

Publication date: August 1, 2003

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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