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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=31
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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| Content Type: | Abstract or Summary only |
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| Author(s): | Macksel, M. T.;
Neal, J. C.;
Senesac, F. |
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| Author Affiliation: | Research Technician and Weed Science Specialist, Cornell University Long Island Horticulture Research Laboratory, Riverhead, NY; Associate Professor, Department of Floriculture and Ornamental Horticulture Cornell University, Itaca, NY |
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| Title: | Early and mid post crabgrass control with reduced rate tank mixes |
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| Section: | Research posters
Other records with the "Research posters" Section
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| Meeting Info.: | Williamsburg, VA; January 2-5, 1996 |
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| Source: | Proceedings of the 50th Annual Meeting of the Northeastern Weed Science Society. Vol. 50, 1996, p. 31. |
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| Publishing Information: | College Park, MD: Northeastern Weed Science Society |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Application timing; Crabgrass control; Digitaria ischaemum; Dithiopyr; Fenoxaprop-ethyl; Herbicide evaluation; Herbicide safety; Postemergence weed control; Preemergence weed control; Tank mix
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| Trade Names: | Acclaim; Dimension |
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| Abstract/Contents: | "Postemergant control of crabgrass in creeping bentgrass turf is a challenge requiring careful attention to plant growth stage and herbicide rate selection. Crabgrass must be identified at the 1 to 3 leaf stage to be controlled with the low rates of fenoxaprop (Acclaim) required for acceptable safety on creeping bentgrass. However, repeated applications at 10 to 14 days are necessary to achieve acceptable control. With each application, turf injury is possible. This was conducted to evaluate tank mixes of low doses Acclaim and dithiopyr (Dimension) alone and in combination for efficency on 1-3 leaf and 1-3 tiller smooth crabgrass (Digitaria ischaemum Schreb. ex Muhl.) and safety on Ā½ inch cut creeping bentgrass turf. Treatments were dithiopyr at 0.09 to 0.38 lb ai/A and fenoxaprop at 0.032 to 0.90 lb ai/A applied seperatly and combinations. Tests were conducted in two locations: Riverhead and Itaca, NY each on established turfgrass areas mowed weekly at 2Ā½ inches. Riverhead tests were conducted on established perennial ryegrass that was irrigated weekly. The Itaca site was irrigated 2 days prior to the treatment and again 1 day after treament, otherwise the Ithaca site was under severe to moderate draught stress throughout the season. Early postmergent treatments of Acclaim at 0.12 lb ai/A provided acceptable crabgrass control at the 3-week rating but control decreases in later ratings (< 60% by 4 weeks and <20% by September). The labeled rate of Acclaim for early post crabgrass control in bentgrass, 0.032 lb ai/A applied at 14 day intervals was ineffeactive in both early post studies. Dimension alone providedā¤ 50% control. Tank mixing Acclaim at 0.06lb ai/A with 0.38 lb ai/A Dimension provided >80% control initially but control from this treatment also decreased to unacceptable levels by 4 weeks. Crabgrass control was better with mid-post (1 to 3 tiller) applications than the earlier timing. By September Acclaim at 0.12 lb ai/A provided >80% in the Riverhead test and >905 in the Ithaca test. Acclaim at 0.09 lb ai/A controlled crabgrass 85% in Ithaca but , 70% in Riverhead. Dimension alone did not control tillered crabgrass. For tank mix treatments, crabgrass control increased as the rate of herbicide increased. In Riverhead the only combinations providing <80% control were Acclaim at 0.09 lb ai/A with 0.18 or 0.38 lb ai/A. In Ithaca, these treatments, as well as Acclaim at0.06 + Dimension at 0.38, provided >90% control. Also in Ithaca, the following combinations provide between 80% and 90% control: 0.09 + 0.09, 0.06 + 0.18, and 0.032 + 0.38 lb ai/A Acclaim + Dimension, respectively. The only treatment with acceptable crabgrass control in any test and to provide acceptable creeping bentgrass safety was 0.032 lb ai/A Acclaim + 0.38 lb ai/A Dimension. Unfortunately, in 1995 this treatment provided acceptable control in only one of the four tests. Higher rates of Acclaim, required for more consistant control, resulted in unacceptable crabgrass injury. These data suggest, that in a year such as 1995, when crabgrass pressure is high and environmental conditions are not condusive to postmergent control, reduced rates of Acclaim and Dimension may be ineffective. This underscores the importance of well timed preemergent herbicide programs in bentgrass turf where known populations of crabgrass exists." |
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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):
Macksel, M. T., J. C. Neal, and F. Senesac. 1996. Early and mid post crabgrass control with reduced rate tank mixes. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 50:p. 31. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1996_vol50.pdf#page=31
Last checked: 07/24/2013
Requires: PDF Reader
Notes: Item is within a single large file |
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MSU catalog number: SB 610 .N62 v. 50 |
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