Testing Herbicides for Kudzu Eradication on a Piedmont Site

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Abstract
Kudzu (Pueraria lobata) continues to spread unabated in the South. To assist in kudzu control and containment efforts, 15 herbicide treatments were tested in 1981 on a Piedmont site in Alabama using replicated plots, with retreatments applied a year later where needed. After 2 years, treatments that gave comparable control to the standard prescription of Tordon 10K at 50 lb/acre were Tordon 101 at 1 and 2 gal/acre, Banvel 720 at 3 and 4 gal/acre, Spike 80W at 6 and 10 lb/acre, and Spike 20P at 20 and 30 lb/acre. The Tordon and Banvel herbicides are currently registered for forest land site preparation and Spike 80W for fence rows and noncroplands. Spike 20P is an experimental compound. Tordon 101 at 1 gal/acre and Banvel 720 at 3 gal/acre were the most cost-effective compounds when two broadcast applications were made in successive years. Tordon 101 and the Spike herbicides also aided in controlling blackberry (Rubus spp.) and Japanese honeysuckle (Lonicera Japonica). Roundup, and Brushkiller's 4-41 and 10-51 were ineffective in controlling kudzu.1

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