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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1990_vol44.pdf#page=143
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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| Publication Type:
| Report |
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| Author(s): | Duell, Robert W.;
Smith, Dirk A. |
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| Author Affiliation: | Cook College, Rutgers |
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| Title: | Turfgrass Phytotoxicity and Annual Grassy Weed Control |
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| Meeting Info.: | Held: January 3,4,5, 1990; Boston MA |
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| Source: | Proceedings of the 44th Annual Meeting of the Northeastern Weed Science Society. Vol. 44, 1990, p. 143-144. |
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| Publishing Information: | Ithaca, NY: Northeastern Weed Science Society |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Dithiopyr; Herbicide trials; Herbicide timing; Phytotoxicity; Digitaria sanguinalis; Growth regulators; Mefluidide; Setaria glauca; Flurprimidol; Fine fescues
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| Abstract/Contents: | "Reports indicate excellent control of warm-season annual grassy weeds following pre and postemergence applications of various formulations of the experimental herbicide MON-1500 (Proposed name is DITHIOPYR). Phytotoxicity to turfgrass was, however, noticed on some fine fescues during 1988 from both pre and post emergence applications of this herbicide. Four-year-old mono-stands of nine turfgrasses were sprayed with rates of MON-15104 which bracketed recommended rates for pre and post emergence control of crabgrass (Digiteria spp.). In addition, at the postemergence application date, three PGRs were applied at their recommended rates, alone, and with 0.5 kg/ha MON-15104. Treatments were replicated three times in radomized complete block with plots measuring 1.2 x 6.3m. Sprays were applied at 200 1/ha from a single even-edge nozzle broadcasting 1 m. wide. Data from four fine fescue species and two turf type tall fescues were subjected to analyses of variance and are presented as histograms representing responses to chemical treatments. responses are in terms of foliar color at three stages during the growing season, clipping dry weight, and percent weed control in 'Jazz' perennial ryegrass (not considered in other parameters). In comparison with untreated check plots, only minor deviations in color resulted from rates and timing of MON-15104. The PGR, mefluidide, consistently reduced color quality while amidochlor and fluriprimidol tended to discolor somewhat less than mefluidide at the first rating. At the second color rating, and to a less extent at the third color rating, the mefluidide treatments significantly depressed color quality. Fluriprimidol did not enhance turf color. Dry weights of grasses differed more under five treatments with MON-15104 than under five treatments with PGRs. 'Reliant' hard fescue and 'Bighorn' sheeps fescue, which generally appear low growing, were particularly dense and high yielding under certain MON-15104 treatments. No phytotoxicity to the nine cool-season turfgrasses could be detected. Data presented here indicated that under these conditions the fine fescues are no more sensitive to reasonable rates, at appropriate application times, than are turf-type tall fescues. Control of yellow foxtail ( Setaria lutescens) by MON-15104 was excellent regardless of rate and timing initially, and reflected diminishing control as rate decreased and time of application was delayed, as one would expect at the later rating. Control was as good, however, from fluriprimidol." |
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| Language: | English |
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| References: | 0 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Duell, R. W., and D. A. Smith. 1990. Turfgrass Phytotoxicity and Annual Grassy Weed Control. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 44:p. 143-144. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1990_vol44.pdf#page=143
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
| 
MSU catalog number: SB 610 .N62 |
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