| |
| Publication Type:
| Report |
|---|
| Content Type: | Abstract or Summary only |
|---|
| Author(s): | McCarty, L. B.;
Colvin, D. L.;
Baker, R. D. |
|---|
| Author Affiliation: | Departments of Environmental Horticulture and Agronomy, University of Florida, Gainesville |
|---|
| Title: | Sequential year application of PGR's for bahiagrass seedhead suppression |
|---|
| Meeting Info.: | Charlotte, NC: January 18-20, 1993 |
|---|
| Source: | Southern Weed Science Society Proceedings. Vol. 46, 1993, p. 232. |
|---|
| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
|---|
| # of Pages: | 1 |
|---|
| Keywords: | TIC Keywords: Paspalum notatum; Growth regulators; Seedhead inhibition
|
|---|
| Abstract/Contents: | "Research was performed to evaluate consecutive yearly applications of several plant growth regulators (PGR's) for bahiagrass (Paspalum notatum Flugge.) seedhead suppression. Treatments included glyphosate, fluazifop-butyl, sethoxydim, ethofumesate, quinclorac, sulfometuron methyl, maleic hydrazide, trinexapac-ethyl and an imazaquin + imazethapyr mixture. Data collected included seedhead counts (number/m2) bahiagrass density (%), plant height (cm) and phytotoxicity (1 to 10 with 5 being the minimum acceptable level). The imazaquin + imazethapyr mixture reduced seedhead production to 0/m2 for approximately 8 weeks after treatment (WAT) but control was lost by 12 WAT. Glyphosate, fluazifop butyl, sethoxydim, sulfometuron methyl and maleic hydrazide maintained good control (< or = 1.0 seedheads/m2) of bahiagrass seedhead production for 8 WAT, but control slipped by 12 WAT. Quinclorac, ethofumesate and trinexapac-ethyl did not adequately control seedhead production when compared to the untreated. All chemicals had density ratings > or = 64% at 8 WAT and > or = 73% at 12 WAT. Ethofumesate treatment resulted in the greatest density with 81% at 12 WAT. At 8 WAT, all chemicals held bahiagrass height to < or = 32 cm with glyphosate exhibiting the shortest height (18 cm). By 12 WAT, glyphosate reported a height of 26 cm compared to 34 cm for the untreated. The heights of the bahiagrass treated with the remaining chemicals was < or = 37 cm at 12 WAT compared to 34 cm for the untreated. All treated bahiagrass had greater density and lower heights than untreated. Least phytotoxicity ratings were from ethofumesate at 2, 3 and 5 WAT (8.5, 8.6 and 8.9, respectively). At 8 WAT, sulfometuron methyl had the least damage (phyto 8.8), while glyphosate had the lowest phytotoxicty rating 12 WAT with a rating of 8.1. No phyto rating at any time for any chemical was below the minimum acceptable 5.0. The suppression of seedhead production was best accomplished by the imazaquin + imazethapyr mixture. Glyphosate proved to be the second best chemical for bahiagrass seedhead control in this study." |
|---|
| Language: | English |
|---|
| References: | 0 |
|---|
| Note: | This item is an abstract only! |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McCarty, L. B., D. L. Colvin, and R. D. Baker. 1993. Sequential year application of PGR's for bahiagrass seedhead suppression. South. Weed Sci. Soc. Proc. 46:p. 232. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=30583 |
| If there are problems with this record, send us feedback about record 30583. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 611 .S6 v.46 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
