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1 October 2013 Effect of PRE and POST Herbicides on Carolina Redroot (Lachnanthes caroliniana) Growth
Stephen L. Meyers, Katherine M. Jennings, David W. Monks, David L. Jordan, James R. Ballington
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Greenhouse studies were conducted in Raleigh, NC to determine Carolina redroot control by selected PRE and POST herbicides labeled for blueberries. Paraquat, glufosinate, glyphosate, and flumioxazin provided some Carolina redroot shoot control 7 d after POST application (DAPOST) ranging from 48 to 74%. Control 25 DAPOST was greatest for hexazinone at 2.2 kg ai ha−1 (90%) followed by glufosinate with 56% control and paraquat and terbacil each with 53% control. Control for most treatments declined between 25 and 63 DAPOST with the exception of glyphosate, which increased to 64%. Carolina redroot shoots per pot were reduced by terbacil, hexazinone at 2.2 kg ha−1, and glyphosate compared with the nontreated check 63 DAPOST. Control of Carolina redroot roots and rhizomes 63 DAPOST ranged from 7 to 68%, with the greatest control provided by terbacil (68%) and hexazinone at 2.2 kg ha−1 (64%). Terbacil and hexazinone at 2.2 kg ha−1 were the only treatments that reduced both shoot and root/rhizome dry weight compared with the nontreated check.

Nomenclature: Flumioxazin; glufosinate; glyphosate; halosulfuron-methyl; hexazinone; paraquat, S-metolachlor; terbacil; Carolina redroot, Lachnanthes caroliniana (Lam.) Dandy.

Estudios de invernadero fueron realizados en Raleigh, NC, para determinar el control de Lachnanthes caroliniana con varios herbicidas PRE y POST registrados para uso en arándanos (Vaccinum corymbosum). Paraquat, glufosinate, glyphosate y flumioxazin brindaron control parcial del tejido aéreo de L. caroliniana a 7 días después de la aplicación POST (DAPOST), el cual varió entre 48 y 74%. El mayor control a 25 DAPOST se obtuvo con hexazinone a 2.2 kg ai ha−1 (90%) seguido por glufosinate con 56% y paraquat y terbacil cada uno con 53% de control. Para la mayoría de los tratamientos, el control disminuyó entre 25 y 63 DAPOST, con la excepción de glyphosate, el cual aumentó a 64%. El número de tallos de L. caroliniana por maceta se redujo con terbacil, hexazinone a 2.2 kg ha−1, y glyphosate al compararse con el testigo no-tratado a 63 DAPOST. El control de raíces y rizomas de L. caroliniana a 63 DAPOST varió entre 7 y 68%, obteniéndose el mayor control con terbacil (68%) y hexazinone a 2.2 kg ha−1 (64%). Terbacil y hexazinone a 2.2 kg ha−1 fueron los únicos tratamientos que redujeron el peso seco de tallos y de raíces/rizomas en comparación con el testigo no-tratado.

Stephen L. Meyers, Katherine M. Jennings, David W. Monks, David L. Jordan, and James R. Ballington "Effect of PRE and POST Herbicides on Carolina Redroot (Lachnanthes caroliniana) Growth," Weed Technology 27(4), 747-751, (1 October 2013).
Received: 8 February 2013; Accepted: 1 July 2013; Published: 1 October 2013

herbicide rate
residual weed control
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