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Title:	Strategies to achieve long-term benefits from multiple operational herbicide applications in lower coastal plain pine stands
Author(s):	Quicke, Harold E.; Lauer, Dwight K.
Date:	2010
Source:	In: Stanturf, John A., ed. 2010. Proceedings of the 14th biennial southern silvicultural research conference. Gen. Tech. Rep. SRS–121. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 129-130.
Station ID:	GTR-SRS-121
Description:	Studies were installed on a range of soils to examine different post-plant herbaceous weed control timings following different site preparation timings with Chopper® herbicide. Chopper site preparation treatments were applied after bedding and included two application dates (August versus November). Pines were planted in winter following site preparation. Site prep was followed with four different post-plant herbaceous weed control timings. This report examines pine growth after five years and relates optimal herbaceous weed control strategies to vegetation cover levels in the absence of weed control. Contrary to expectation, the November Chopper application did not increase residual weed control over the August application. The earlier Chopper application date resulted in better growth than the later date on four of five sites. Optimal strategies for post-plant herbaceous weed control were highly dependent on site, ranging from two consecutive years of weed control on a silt-loam soil to no benefit from any additional weed control on spodosols.
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