Full TGIF Record # 230152
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Author(s):Brooks, Louanne S.; Weidenfeller, Ted A.
Author Affiliation:Brooks: Dow AgroSciences, Indianapolis, IN; Weidenfeller: Consultant, Plymouth, MN
Title:Results of six herbicide treatments for leafy spurge control along roadsides
Section:Industrial, forestry, turf, and aquatics
Other records with the "Industrial, forestry, turf, and aquatics" Section
Meeting Info.:St. Paul, Minnesota: December 8-10, 1998
Source:Proceedings: North Central Weed Science Society. Vol. 53, 1998, p. 99.
# of Pages:1
Publishing Information:[Champaign, Illinois]: [North Central Weed Science Society]
Abstract/Contents:"Traditional control of leafy spurge along roadsides in the upper Midwest consists of picloram + 2,4-D combinations (0.25 to 0.5 lb/a + 1 to 2 lb/a), applied every other year. This treatment is generally effective, but can also injure desirable woody vegetation within the treatment area. In an effort to identify alternative herbicide treatments less injurious to woody vegetation, three replications (random block design) of six herbicide treatments were applied to a uniformly dense stand of leafy spurge at two timings (May and September), with an without methylated seed oil, to evaluate leafy spurge control and impact on desirable grasses. The treatments, applied at a rate of 30 gpa, included picloram + 2,4-D (0.5 + 2 lb/a), picloram + 2,4-D + methylated seed oil (0.5 + 2 lb/ + 0.25 gpa), imazapic + methylated seed oil (0.18 lb/a + 0.25 gpa), picloram + 2,4-D + clopyralid (0.063 + 0.25 + 0.5 + 0.25 gpa) and an untreated control. The site consisted of a heavy stand of leafy spurge with a mixture of brome and blue grass on a sandy loam soil. Evaluations were made in May and July 1998. May or September applications of 1 gpa Tordon 101M (0.5 lb picloram + 2 lb 2,4-D) offered the best spurge control and no injury to grasses (85 to 95% control). Methylated seed oil did not enhance the performance of Tordon 101. Tordon 101 0.25 gal + Plateau 6 oz (0.09lb/a imazapic) + methylated seed oil offered acceptable control initially, but leafy spurge re-colonized the treatment in both the spring and fall applications. Grass seed head development was suppressed. Plateau 12 oz (0.18 lb/a imazapic) + methylated seed oil applied in the spring was unacceptable due to poor spurge control and stunting of the grass. Fall application of 12 oz Plateau was excellent the following spring, but was unacceptable by late July. Tordon + Transline (0.063 lb/a picloram + 0.25 lb/a 2,4-D + 0.5 lb/a clopyralid) combinations stunted and thinned leafy spurge, but provided unacceptable control with no grass injury. Methylated seed oil did enhance herbicide performance, but not enough to offer acceptable control. Fall applied Tordon/Plateau, Plateau, and Tordon/Transline all provided 40 to 50% control, which might provide acceptable alternative for leafy spurge control around desirable woody vegetation if applied for two or three consecutive years."
See Also:Original version appears in Proceedings: North Central Weed Science Society, vol. 52 1997, p. 107-108, with variant title "Preliminary results of six herbicide treatments for leafy spurge control along roadsides", R=278637. R=278637
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Brooks, L. S., and T. A. Weidenfeller. 1998. Results of six herbicide treatments for leafy spurge control along roadsides. Proc. North Cent. Weed Sci. Soc. 53:p. 99.
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