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| Web URL(s): | http://www.newss.org/proceedings/proceedings-2015.pdf#page=88
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single 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.;
Czarnota, M.;
Johnston, C.;
Singh, R. |
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| Author Affiliation: | University of Georgia, Griffin |
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| Title: | Selectivity of primisulfuron-methyl for annual bluegrass control in Kentucky bluegrass |
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| Meeting Info.: | Williamsburg, Virginia: January 5-8, 2015 |
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| Source: | Proceedings of the Sixty-ninth Annual Meeting of the Northeastern Weed Science Society. Vol. 69, 2015, p. 86. |
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| Publishing Information: | College Park, Maryland: The University of Maryland |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Physiological responses; Poa annua control; Poa pratensis; Primisulfuron-methyl; Selective weed control; Weed control
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| Abstract/Contents: | "Annual bluegrass (Poa annua) is a problematic weed of Kentucky bluegrass (Poa pratensis) turf that may be selectively controlled with POST applications of primisulfuron-methyl. The objective of this research was to evaluate physiological behavior of primisulfuron-methyl attributed to selectivity in these species. In application placement experiments, annual bluegrass shoot weight reductions from the nontreated from high to low were treatments including: foliar + soil ≥ soil only ≥ foliar only. Annual bluegrass averaged 33 and 52 percent shoot weight reductions from the nontreated after 4 wk from primisulfuron-methyl at 40 and 80 g ha-1, respectively. Kentucky bluegrass shoot weight was not reduced from the nontreated and application placements were similar. From five harvests ranging 1 to 168 hours after treatment (HAT), annual and Kentucky bluegrass absorbed up to 25 and 32 percent of foliar applied 14C-primisulfuron-methyl, respectively, and reached peak absorption at 22 (±1.4) and 31 (±1.6) HAT, respectively. Both grasses distributed 15% of foliar absorbed 14C to nontreated shoots with minimal translocation (≤2 percent) to roots after 168 h. Annual bluegrass translocated 2x more root-absorbed 14C to shoots than Kentucky bluegrass at 24, 72, and 168 HAT. From foliar uptake, metabolism increased with time from 1 to 168 HAT but Kentucky bluegrass averaged ≅50 percent less parent herbicide than annual bluegrass and 27 percent greater levels of a polar metabolite (Rf 0.1). In root metabolism experiments, annual bluegrass had ≅3x and 2x more primisulfuron acid in roots and shoots, respectively, than Kentucky bluegrass at 24, 72, and 168 HAT. The isolated ALS enzymes from the two grasses were equally susceptible to inhibition by primisulfuron-methyl. Overall, selectivity of primisulfuron-methyl for annual bluegrass control in Kentucky bluegrass is attributed to differential translocation and metabolism between species." |
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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., M. Czarnota, C. Johnston, and R. Singh. 2015. Selectivity of primisulfuron-methyl for annual bluegrass control in Kentucky bluegrass. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 69:p. 86. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings-2015.pdf#page=88
Last checked: 10/23/2015
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
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