| |
| Web URL(s): | http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=121
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | Johnson, B. J. |
|---|
| Author Affiliation: | Professor, Crop and Soil Sciences, University of Georgia, Georgia Station, GA |
|---|
| Title: | Weed control programs utilizing reduced herbicide rates for crabgrass control in bermudagrass |
|---|
| Meeting Info.: | Williamsburg, VA; January 2-5, 1996 |
|---|
| Source: | Proceedings of the 50th Annual Meeting of the Northeastern Weed Science Society. Vol. 50, 1996, p. 121. |
|---|
| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Chemical use reduction; Crabgrass control; Cynodon; Environmental stewardship; Herbicide efficacy; Herbicide evaluation; Herbicide rates; Research priorities; Tank mix; Weed control
|
|---|
| Abstract/Contents: | "Bermudagrasses (Cynodon spp.) are widely used on golf courses, athletic fields, and other recreation areas throughout the southern United States. To maintain a desireable quality of turf, herbicides must be in the overall management program. Crabgrass (Digitaria supp.) can be controlled by recommended rates of preemergence (PRE) and postemergence (POST) herbicides. However, because of increasing environmental and regulatory pressures, it may be necessary to reduce the total quantity of herbicides used for weed control in turfgrasses. Therefore, programs were developed to utilize lower herbicide rates for full-season weed control in bermudagrass turf. These programs were: a)sequential applications or PRE and POST herbicides applied at different dates, b) tank-mixes of PRE and POST herbicides applied as a single application after weed emerge, and c) multiyear use of PRE herbicides applied at reduced rates over years. Sequential PRE and POST herbicides. PRE herbicides applied late in February at 50 to 75% lower than recommended rates in late winter and followed by one timely POST herbicide application in late spring or early summer controlled crabgrass as effectively as the maximum labeled rate of PRE herbicide applied alone. Crabgrass control was effective (ā„80%) with the following programs: Ronstar (oxadiazon) (G) at a one-fourth rate (1.0 lb ai/A) and pendimethalin (WDG) at a one-third rate (1.0 lb ai/A) when either herbicide was followed by MSMA at the full rate (2.0 lb ai/A); Barracide (prodiamine) (WDG) at a one-third rate (0.25 lb ai/A) and followed by MSMA at one-fourth rate (0.67 lb ai/A) and followed by MSMA at one-half rate (1.0 lb ai/A). Tank-mixed PRE and POST herbicides. A single May application of one-half rates of Dimension (dithiopyr) (0.25 lb ai/A) or pendimethalin (1.5 lb ai/A) tank-mixed with MSMA at 2.0 lb ai/A controlled 80% or higher crabgrass. However, the tank-mixtures of PRE and POST herbicides were not as effective as sequential PRE and POST herbicides. Multiyear use of PRE herbicides. PRE herbicides were applied at various rates to the same plots over a 3 year period for crabgrass control. Effective control was maintained during this period when Dimension (0.25 lb ai/A) pendimethalin (1.5 lb ai/A), Barricade (0.38 lb ai/A), and Surflan (1.0 lb ai/A) were applied at one-half rates the first year and followed by one-fourth rates the second and third years. However, Ronstar required a full rate (3.0 lb ai/A) the first year followed by a three-fourth rate the second year, and one-half rate the third year to effectively control crabgrass." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, B. J. 1996. Weed control programs utilizing reduced herbicide rates for crabgrass control in bermudagrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 50:p. 121. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=42173 |
| If there are problems with this record, send us feedback about record 42173. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=121
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 v. 50 |
| Find from within TIC:
Digitally in TIC by file name: newss1996 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
