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| Web URL(s): | http://www.newss.org/proceedings/proceedings_2006.pdf#page=92
Last checked: 07/22/2013
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Notes: Item is within a singel large file |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | McCullough, P. E.;
Hart, S. E. |
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| Author Affiliation: | Rutgers, The State University of New Jersey, New Brunswick, New Jersey |
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| Title: | Temperature influences bispyribac-sodium, primisulfuron, and sulfosulfuron efficacy |
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| Section: | Turfgrass and plant growth regulators
Other records with the "Turfgrass and plant growth regulators" Section
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| Meeting Info.: | Providence, RI: January 3-6, 2006 |
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| Source: | Proceedings: NortheasternWeed Science Society. Vol. 60, 2006, p. 87. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Bispyribac-sodium; Herbicide evaluation; Primisulfuron; Herbicide resistance; Non-target effects; Assessment; Responses; Clipping weight; Seasonal variation; Temperatures; Sulfosulfuron; Chlorosis
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| Abstract/Contents: | "As new herbicides are introduced to the turfgrass industry, information is warranted regarding parameters that influence efficacy for weed control and turfgrass safety. Field experiments with bispyribac-soduim, primisulfuron, and sulfosulfuron have noted seasonal efficacy variations that are believed to result from temperature rather than other environmental parameters. To test this hypothesis, three growth chamber experiments were conducted to investigate influence of temperature on the efficacy of these three herbicides. Responses of annual bluegrass and creeping bentgrass were tested in experiments with bispyribac-sodium (BS) applied at 0, 37, 74, 148, 222, or 296 g a.i./ha at 10, 20, or 30° C. At 10° C, BS reduced annual bluegrass clippings 20 to 80% from untreated after 4 wk but caused = 20% chlorosis. Annual bluegrass grown at 20° C and 30 ° C had clipping reductions ranging 40 to 100% from the untreated with 40 to 80% chlorosis. Creeping bentgrass chlorosis ranged 10 to 50% 4 WAT at 10° and clippings were reduced 20 to 60% from untreated turf. At 20°, bentgrass clipping reductions and leaf chlorosis from BS were 0 to 20% of the untreated 4 WAT. Increases to 30° caused 0 to 20% bentgrass chlorosis from BS but clipping yield reductions increased 20 to 40% of untreated turf. Results confirm seasonal BS efficacy variability from field experiments resulted from increased BS efficacy for annual bluegrass control at warmer temperatures with minimal bentgrass discoloration while cooler temperatures had minimal efficacy on annual bluegrass and increased bentgrass chlorosis. Responses of creeping bentgrass, Kentucky bluegrass, and roughstalk bluegrass were tested with sulfosulfuron at 0, 5.6, 11.2, 22.4, or 44.8 g a.i/ha/3 weeks at 15, 20, or 25° C. Creeping bentgrass tolerance to sequential sulfosulfuron treatments increased with temperature while Kentucky bluegrass generally had minimal (< 10%) chlorosis at all temperatures. Roughstalk bluegrass was most sensitive to sulfosulfuron with greater chlorosis at 15 and 25° (up to 75%) than 20° (up to 65%). Responses of annual bluegrass, Kentucky bluegrass, and roughstalk bluegrass were tested with primisulfuron at 0, 26, 52, 104, or 208 g a.i./ha/3 weeks at 15, 20, or 25° C. As temperature increased, sensitivity to primisulfuron of all three bluegrasses generally increased. Kentucky bluegrass was most tolerant to primisulfuron but sequential applications at 25° caused 11 to 34% chlorosis from untreated. Sequential primisulfuron applications on annual and roughstalk bluegrass caused substantial leaf chlorosis (40 to 100%) at 15 and 20° but caused complete desiccation at 25° at all rates after 6 weeks. Primisulfluron inhibited Kentucky bluegrass growth ~50 to 100% from untreated while annual and roughstalk bluegrass growth was inhibited 100% from untreated following sequential applications. Results confirm better primisulfuron efficacy in summer than fall from field experiments in New Jersey resulted from greater leaf chlorosis and growth inhibition at higher temperatures." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
McCullough, P. E., and S. E. Hart. 2006. Temperature influences bispyribac-sodium, primisulfuron, and sulfosulfuron efficacy. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 60:p. 87. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_2006.pdf#page=92
Last checked: 07/22/2013
Requires: PDF Reader
Notes: Item is within a singel large file |
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MSU catalog number: SB 610 .N62 v. 60 |
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