| |
| Web URL(s): | http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=185
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
|---|
| Publication Type:
| Report |
|---|
| Author(s): | Cutulle, Matthew;
Derr, Jeffrey;
McCall, David;
Nichols, Adam;
Horvath, Brandon |
|---|
| Author Affiliation: | Cutulle, Derr, McCall and Nichols: Virginia Tech, Virginia Beach; Horvat: Univ. Tennessee, Knoxville |
|---|
| Title: | Impact of bispyribac-sodium on phytotoxicity and disease development in tall fescue |
|---|
| Section: | Weed management in turf
Other records with the "Weed management in turf" Section
|
|---|
| Meeting Info.: | San Juan, Puerto Rico: January 24-26, 2011 |
|---|
| Source: | 2011 Proceedings, Southern Weed Science Society. Vol. 64, 2011, p. 77. |
|---|
| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Application timing; Bispyribac-sodium; Chitinase; Festuca arundinacea; Heat stress; Herbicide evaluation; Poa annua control; Postemergence weed control; Rhizoctonia blight; Rhizoctonia solani; Seasonal maintenance
|
|---|
| Abstract/Contents: | "Tall fescue is one of the most commonly-utilized turfgrasses for home lawns and other turf areas in the United States. Tall fescues popularity is attributed to a deep root system (drought tolerance), relatively low nitrogen requirements, and a resistance to most diseases. However, two pests that are problematic in tall fescue include the fungal pathogen Rhizoctonia solani (causes brown patch) and the cool-season annual grass annual bluegrass [Poa annua (L.)]. R. solani infects tall fescue stands during hot humid conditions when tall fescue is under summer stress. The subsequent disease, brown patch, is aesthetically unpleasing and can thin the turfgrass stand, leading to the germination and encroachment of winter annual weeds such as annual bluegrass. Typically, tall fescue is overseeded in the fall, thus the application of preemergence herbicides for control of annual bluegrass is not an option. Currently, there are no postemergence herbicide options for spring/summer control of annual bluegrass in tall fescue. A potential postemergence herbicide for control of annual bluegrass in tall fescue is bispyribac-sodium. However, preliminary reports show that applications of bispyribac-sodium to tall fescue in May increased its susceptibility to brown patch. Chitinase activity is positively correlated with resistance to R. solani in rice, thus if applications of bispyribac-sodium reduce chitinase activity in tall fescue then it may be responsible for the increased brown patch severity. Additionally, applications of bispyribac-sodium caused a flush of growth 5 weeks after application, which may create an environment more conducive to brown patch infection. Experiments evaluating timing and rates of bispyribac-sodium on brown patch severity in tall fescue were performed in greenhouses at Virginia Techs Hampton Roads Agricultural Research and Extension Center in Virginia Beach. The experimental design was a strip plot. Plants were either inoculated or not inoculated with R. solani. Bispyribac-sodium was applied at rates of 37 and 74 g ai ha-1 either 6, 4, or 0 weeks before inoculation. Plant growth, brown patch lesions and phytotoxicity were recorded. In a separate experiment, bispyribac-sodium was applied at 37 g ai ha-1 to tall fescue. Chitinase activity was taken from treated tall fescue plants or control plants 2 and 7 days after application. In a cultivar response trial three different tall fescue cultivars and annual bluegrass were treated with bispyribac-sodium at a rate of 37 g ai ha-1. Pictures were taken 0 and 10 days after treatment and analyzed using SigmaScan Pro 5.0 for differences in Dark Green Color Index (DGCI). Applications of bispyribac-sodium to tall fescue 6 weeks prior to inoculation resulted in the most brown patch lesions. All plants treated with bispyribac-sodium had more brown patch lesions when compared to the untreated check. Also, tall fescue plants treated with bispyribac-sodium exhibited more shoot growth 6 weeks after application compared to the untreated check. Tall fescue treated with bispyribac-sodium had less chitinase activity than the untreated check. Application of bispyribac-sodium did not have an impact on DGCI in tall fescue; however, annual bluegrass DGCI was reduced." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cutulle, M., J. Derr, D. McCall, A. Nichols, and B. Horvath. 2011. Impact of bispyribac-sodium on phytotoxicity and disease development in tall fescue. South. Weed Sci. Soc. Proc. 64:p. 77. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=226712 |
| If there are problems with this record, send us feedback about record 226712. |
| Choices for finding the above item: |
|---|
| Web URL(s):
http://www.swss.ws/wp-content/uploads/docs/2011 Proceedings-SWSS.pdf#page=185
Last checked: 08/05/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: b2207931 |
| Find from within TIC:
Digitally in TIC by file name: swssp2011 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
