| |
| Publication Type:
| Report |
|---|
| Author(s): | Taylor, J. M.;
Coats, G. E. |
|---|
| Author Affiliation: | Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762 |
|---|
| Title: | Vegetation management on highway rights-of-way with sulfonylurea-resistant Italian ryegrass (Lolium multiflorum Lam.) |
|---|
| Meeting Info.: | 48th Annual Meeting, Memphis, TN, January 16-18, 1995 |
|---|
| Source: | Southern Weed Science Society Proceedings. Vol. 48, January 1995, p. 154-155. |
|---|
| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
|---|
| # of Pages: | 2 |
|---|
| Keywords: | TIC Keywords: Lolium multiflorum; Herbicides; Weeds; Roadside turf
|
|---|
| Abstract/Contents: | "Sulfonylurea-resistant Italian ryegrass is a problem to vegetarian managers. Because usual control methods such as sulfometuron are no longer effective, alternative herbicides that will control this resistant weed may not result in acceptable control of other species. In 1993 and 1994 experiments were established to begin developing a method of controlling sulfonylurea-resistant Italian ryegrass and other weeds present. In the first experiment, diuron (Karmex 80 DF) was applied at 560 to 5600 g ai/ha in 560 g/ha increments in either November or April. With either application date, 2240 g/ha or more diuron resulted in at least 78% control of resistant Italian ryegrass 7 MAIT (months after initial treatment). Bermudagrass density at 7 MAIT was significantly more with 2240 g/ha diuron or greater applied in the fall and 1120 g/ha or greater applied in the spring, as compared to the untreated. With the fall treatments of diuron, horseweed [Conyza canadensis (L) Cronq.] was released due to early removal of the Italian ryegrass competition. At 5 MAIT (April), bermudagrass density was generally higher following fall diuron applications, but at 7 MAIT (June) bermudagrass density was generally higher with the spring applications. These data suggest that while diuron will control sulfonylurea-resistant Italian ryegrass, an additional herbicide is needed to control horseweed. In a second experiment, 0, 896, 1792 or 2688 g ai/ha diuron was tank-mixed with 0, 26, 53, or 105 g ai/ha sulfometuron (Oust 75 DF) and applied in November. At 7 MAT Italian ryegrass control was 83% or greater with 2688 g/ha diuron alone or tank-mixed with any rate of sulfometuron. In addition, horseweed control was 85% or greater with 53 g/ha sulfometuron alone or added to any rate of diuron. In a third experiment, 2.4 to 5.9 L/ha of a prepackaged mixture of glyphosate + 2, 4-D (Campaign 3.1 L) was applied alone or tank-mixed with 13 to 31 g ai/ha sulfometuron. These treatments were applied at 10% regrowth of bermudagrass in April. Glyphosate + 2, 4-D at 5.9 L/ha applied alone or tank-mixed with sulfometuron was generally required for 75 to 80% control. In a fourth experiment, 1.2 to 1.8 L/ha glyphosate (Roundup 4 L) or 3.5 or 4.7 L/ha glyphosate + 2, 4-D were applied alone or tank mixed with 2240 g ai/ha diuron in March. Glyphosate at 1.2 L/ha + 2240 g/ha duiron or 1.8 L/ha glyphosate alone or tank-mixed with 2240 g/ha duiron provided 78% or greater control of sulfonylurea-resistant Italian ryegrass. In addition, 3.5 or 4.7 L/ha glyphosate + 2,4-D with 2240 g/ha diuron provided 78% or greater control. Diuron, 1.2 L/ha glyphosate, or 3.5 to 4.7 L/ha glyphosate + 2,4-D provided 70% or less control of Italian ryegrass." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Taylor, J. M., and G. E. Coats. 1995. Vegetation management on highway rights-of-way with sulfonylurea-resistant Italian ryegrass (Lolium multiflorum Lam.). South. Weed Sci. Soc. Proc. 48:p. 154-155. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=38946 |
| If there are problems with this record, send us feedback about record 38946. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 611 .S6 v.48 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
