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| Web URL(s): | http://newss.org/proceedings/proceedings_2009.pdf#page=27
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | O'Driscoll, M. G.;
Neal, J. C.;
Little, D. A.;
Shear, T. H. |
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| Author Affiliation: | North Carolina State University, Raleigh |
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| Title: | Postemergence control of common periwinkle in a forested urban park |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Baltimore, Maryland: January 6-8, 2009 |
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| Source: | Proceedings of the Sixty-Third Annual Meeting of the Northeastern Weed Science Society. Vol. 63, 2009, p. 12. |
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| Publishing Information: | Baltimore, Maryland: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Application timing; Glyphosate; Imazapyr; Picloram; Postemergence herbicides; Triclopyr; Vinca minor; Weed control
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| Trade Names: | Tordon; Garlon; Roundup Pro |
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| Abstract/Contents: | "Long-appreciated as an ornamental ground cover in the United States, common periwinkle (Vinca minor L.) has more recently been recognized as a harmful invader of natural areas throughout its introduced range. Periwinkle is a (semi-)evergreen vine that grows well under moderate to heavy shade. Leaves are opposite, simple, narrowly elliptical; stems are slender, green, somewhat woody, and spread vegetatively rooting at the nodes forming dense mats. Pale blue, lilac or white, 5-petaled, axillary flowers are produced abundantly in the spring, then sporadically throughout the growing season. In the U.S., it is not known to produce viable seeds. Recommended control procedures for this species are limited and often conflicting. A study was established in Greensboro, NC to determine the effectiveness of postemergence herbicides currently recommended or commonly used for controlling periwinkle. Plots (15 X 10 ft) were established within 5 patches of periwinkle in forested sections of Guilford Courthouse National Military Park. Treatments were arranged in a RCBD with 8 replicates and applied October 7, 2007 and March 26, 2008 with a CO2 pressurized sprayer equipped with flat fan nozzles and calibrated to deliver 30 GPA. Herbicides tested were: 1 lb ai/A picloram (Tordon® K); 0.5, 1.5, and 3.0 lb ai/A triclopyr (Garlon 3A); 2 and 4 lb ai/A glyphosate (Roundup Pro®); 2 and 4 lb ai/A 2-4 D amine; 0.25 lb ai/A imazapyr (Arsena® l 2L); and 1.5 lb ai/A triclopyr + 2 lb ai/A 2-4 D Amine. To test for seasonal differences in control, glyphosate and triclopyr were applied in the fall and spring; other treatments were applied in the fall only. Percent control and new growth inhibition were visually estimated 6, 9 and 12 months after fall applications; percent ground cover was estimated before fall applications and 12 months after. Nine months after fall applications (3 months after spring applications), both rates of fall-applied glyphosate provided approximately 90% control. Spring-applied glyphosate at 4 lb/A provided 75% control. Picloram, imazapyr, spring-applied glyphosate at 2 lb/A, and spring-applied triclopyr at 3 lb/A provided about 40% control and new growth inhibition of 40 to 60%. Spring-applied triclopyr at 1.5 lb/A did not control periwinkle but was observed to inhibit new growth by 32%. Fall-applied triclopyr or 2,4-D did not control periwinkle. One year after fall treatments, glyphosate at 2 and 4 lb/A controlled periwinkle by 80% and 96%, respectively. Spring-applied high rate of glyphosate also provided about 80% control. At the final rating, picloram, imazapyr, spring-applied low rate of glyphosate, and spring-applied high rate of triclopyr all provided about 50% control. Spring-applied triclopyr at 1.5 lb/A provided only 20% control; other treatments provided no control. Glyphosate was more effective when applied in the fall. Triclopyr showed greater control when applied in the spring. Glyphosate provided excellent control of periwinkle and is apparently most effective when applied in the fall. Other postemergence herbicides might reduce the density of infestation, but do not provide acceptable control." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
O'Driscoll, M. G., J. C. Neal, D. A. Little, and T. H. Shear. 2009. Postemergence control of common periwinkle in a forested urban park. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 63:p. 12. |
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| Web URL(s):
http://newss.org/proceedings/proceedings_2009.pdf#page=27
Last checked: 07/17/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 |
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