| |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Cargill, L. M.;
Martin, D. L.;
Montgomery, D. P.;
Baird, J. H. |
Author Affiliation: | Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078 |
Title: | Effects of diglycolamine salt of dicamba on selected weed problems along Oklahoma highway rights-of-way |
Meeting Info.: | 50th Annual Meeting, Houston, TX, January 20-22, 1997 |
Source: | Southern Weed Science Society Proceedings. Vol. 50, January 1997, p. 138-139. |
Publishing Information: | Champaign, IL: Southern Weed Science Society. |
# of Pages: | 2 |
Abstract/Contents: | "Three field experiments were initiated in 1996 to evaluate the efficacy of selected herbicide treatments for control of kochia (Kochia scoparia (L.) Schrad.), musk thistle (Carduus nutans L.) and Scotch thistle (Onopordum acanthium L.) along highway rights-of-way in Oklahoma. Herbicide treatments in the kochia study included diglycolamine salt of dicamba (Vanquish) @ 0.5 lb. ai/A, alone, and in combination with clopyralid (Transline) @ 0.14 lb. ai/A and Transline @ 0.14 lb. ai/A applied on 26 April to 1-3 inch tall kochia. Also, Vanquish @ 0.75 lb. ai/A, alone, and in combination with Transline @ 0.234 lb. ai/A and Transline @ 0.234 lb. ai/A were applied 15 May to 3-6 inch tall kochia. Herbicide treatments used in the musk thistle included Vanquish @ 0.5 and 1.0 lb. ai/A, Transline @ 0.125 and 0.25 lb. ai/A and combinations of Vanquish + Transline @ 0.125 + 0.125 and 0.125 + 0.09 lb. ai/A. Treatments were applied to 5-18 inch diameter musk thistle rosettes on 16 April. Herbicide treatments in the Scotch thistle experiment included Vanquish @ 0.5 and 1.0 lb. ai/A, Transline @ 0.125 and 0.25 lb. ai/A and combinations of Vanquish + Transline @ 0.25 + 0.09 and 0.25 + 0.125 lb. ai/A. Application was made 10 April to 5-24 inch diameter Scotch thistle rosettes. All herbicide treatments in these three experiments included a nonionic surfactant at a rate of 0.25% v/v. Plot size was 5 by 10 ft. in the kochia and musk thistle studies and 5 by 15 ft. in the Scotch thistle experiment. All herbicide treatments were made using a CO²-powered bicycle boom sprayer equipped with 8002 VS flat-fan tips calibrated to deliver 20 GPA at 25 psi. In all three experiments, treatments were arranged in randomized complete block designs with three replications. Percent kochia control was visually evaluated 4, 8 and 12 weeks-after-treatment (WAT) and visual evaluations were conducted for percent musk thistle and Scotch thistle control 1 and 2 months-after-treatment (MAT). In the kochia control experiment all treatments of Vanquish, alone, and in combination with Transline produced excellent control of kochia (96 to 100%) while treatments of Transline alone provided only 28 to 63% (unacceptable) control at 4 and 8 WAT (acceptable being 90% control or greater). By 12 WAT, all herbicide treatments maintained an excellent level of kochia control (99 to 100%) except treatments of Transline alone (18 to 23%) which were still unacceptable. Evaluations made at both 1 and 2 MAT in the musk thistle control experiment indicated no significant differences in percent control among all herbicide treatments. At 1 MAT, all herbicide treatments produced 100% control of musk thistle except Vanquish @ 0.5 lb. ai/A (>91%). All herbicide treatments exhibited 100% control at 2 MAT except Vanquish @ 0.5 lb. ai/A (>95%). Acceptable musk thistle control (90% or greater) was provided by all herbicide treatments throughout the duration of this experiment. Visual observations made 1 MAT in the Scotch thistle control experiment indicated Vanquish @ 0.5 lb. ai/A exhibited the best (but marginal) control (78%). Percent Scotch thistle control from the remaining treatments ranged from 26 to 65% which was unacceptable (90% or greater being acceptable). By 2 MAT, both treatments of Vanquish alone produced complete control of Scotch thistle (100%). Treatments of Transline resulted in 86 to 93% control of Scotch thistle (marginal to acceptable). |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Cargill, L. M., D. L. Martin, D. P. Montgomery, and J. H. Baird. 1997. Effects of diglycolamine salt of dicamba on selected weed problems along Oklahoma highway rights-of-way. South. Weed Sci. Soc. Proc. 50:p. 138-139. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=42327 |
| If there are problems with this record, send us feedback about record 42327. |
| Choices for finding the above item: |
| MSU catalog number: SB 611 .S6 v. 50 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |