Pine Regeneration with Simultaneous Control of Kudzu
| Authors: | Jerry L. Michael |
| Year: | 1986 |
| Type: | Scientific Journal |
| Station: | Southern Research Station |
| Source: | In: Proceedings, 39th Annual Meeting Southern Weed Science Society; 1986 January 20-22; Nashville, TN. [Champaign, IL]: Southern Weed Science Society. 282-288. |
Abstract
Kudzu (Pueraria lobata (Willd.)Ohwi) growing on clay, clay loam, and sandy loam soils in cm and north Alabama was treated in a randomized design on each soil type with three replications using three application rates of Arsenal@ (imazapyr at 0.5, 1.0, and 2.0 lb se/a), a single rate of Tordone 101 [1.35 lb ae/a picloram plus 5 lb se/a 2,4-dichlorophenoxy acetic acid (2,4-D), 2.5 gal/al, Lontrel® (3,6-dichloropicolinic acid at 2.0 lb se/a), Lontrel plus 2,4-D (0.34 lb plus 1.66 lb 2,4-D ae/a), and Velpar L® (hexazinone at 3.0 lb ai/a). Sites were treated between mid-June and mid-July in 1983 and retreated at the same application rates in June 1984.Tordon 101, Lontrel, and Lontrel plus 2,4-D gave the best results over all sites in each year of treatment. Hexazinone was effective in controlling kudzu only on the sandy loam soil, whereas the high rate of Arsenal was effective on the loamy soils but not on clay.
Survival of replanted pines was adversely affected by Tordon 101 and Velpar L treatment but not by Arsenal, Lontrel, or the Lontrel plus 2,4-D treatment. Pine height growth appeared to be inhibited most by Arsenal rates greater than 0.5 lb ae/a.
Kudzu control can be achieved simultaneously with pine regeneration on sandy loam sites using Lontrel, Lontrel plus 2,4-D, or Arsenal. None of these are fully registered for forestry, but Arsenal can be used under an Experimental Use Permit. On sites where kudzu infestation exists on heavy clay soil, simultaneous kudzu control and pine regeneration are more difficult.