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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1992_vol46.pdf#page=133
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): | Neal, J. C.;
Osmeloski, J. F. |
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| Author Affiliation: | Cornell Univ.--Assoc. Prof.; Technician, Dept. of Flor & Orn Hort |
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| Title: | Dithiopyr residue effects on turfgrass seedling establishment |
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| Source: | Proceedings of the 46th Annual Meeting of the Northeastern Weed Science Society. Vol. 46, 1992, p. 133. |
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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: Dithiopyr; Residues; Turfgrasses; Seeding
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| Abstract/Contents: | "Late summer or early fall is the recommended time to seed or over-seed cool-season turfgrasses. However, long-residual preemergent herbicides applied in the spring and summer for crabgrass (Digitaria spp.) and goosegrass (Eleusine indica (L.) Gaertn.) control have the potential to interfere with turfgrass seedling establishment. Dithiopyr (MON 151..) is a preemergent herbicide which has provided season-long crabgrass control from spring applications. This long residual activity could interfere with the success of fall seedings. Therefore, we conducted experiments to define safe treatment-to-seeding intervals for dithiopyr and the major cool-season turfgrasses. Dithiopyr 1EC (MON15104) at 0.3, 0.4, 0.6, 0.8, and 1.1 kg/ha; dithiopyr 0.25% GR (MON15125) at 0.3, 0.6, and 0.8 kg/ha; pendimethalin 60WDG at 3.3 kg/ha; and oxadiazon 2% GR were applied on or about the first of June, July, and August of 1990 and 1991 to an established turf. In 1991, treatments were also applied on May 1. Experimental design was a randomized complete block with four replicates. In mid-August, the turf was killed with 2 kg/ha glyphosate. On September 1, Kentucky bluegrass (Poa pratensis), perennial ryegrass (Lolium perenne), Chewings fescue (Festuca rubra var commutata), and creeping bentgrass (Agrostis palustris) were slit-seeded across all herbicide treatments. Turfgrass injury and percent cover were visually evaluated. In the 1990 experiment, dithiopyr 0.25% GR significantly reduced the percent coverage in all grass species at all rates and timing intervals except for 0.3 kg/ha applied in June to perennial ryegrass and chewings fescue. The EC formulation was less injurious. July and August applications were injurious to all species. June applications at 0.3 kg/ha were safe to all four species; however, higher rates reduced turf cover and the rate of establishment. In 1991, May applications at rates above 0.3 kg/ha reduced turf cover. Pendimethalin injured all four grasses when applied in August and slowed seedling establishment when applied in July. June applications injured bentgrass but were safe on the other species. Oxadiazon at 3.3 kg/ha injured all species at all application times. In general, under the conditions of these tests in up-state New York, dithiopyr 1EC at 0.3 to 0.4 kg/ha was comparable to pendimethalin at 3.3 kg/ha for over-seeded turf safety. The length of residual activity of dithiopyr 0.25 % GR was comparable to oxadiazon 2% GR in these tests. These data suggest careful rate selection and proper attention to over-seeding intervals are essential when these residual herbicides are used in turf, particularly when used in early-postemergent or split application programs." |
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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):
Neal, J. C., and J. F. Osmeloski. 1992. Dithiopyr residue effects on turfgrass seedling establishment. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 46:p. 133. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1992_vol46.pdf#page=133
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 |
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