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| Web URL(s): | http://www.newss.org/proceedings/proceedings_1999_vol53.pdf#page=61
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): | Watschke, T. L.;
Borger, J. A. |
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| Author Affiliation: | Watschke: Professor, Department of Agronomy, Penn State University, University Park, PA; Borger: Research Assistant, Department of Agronomy, Penn State University, University Park, PA |
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| Title: | Preemergence control of smooth crabgrass with spring and fall herbicide applications |
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| Meeting Info.: | Cambridge, MA: January 4-7, 1999 |
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| Source: | Proceedings of the 53rd Annual Meeting of the Northeastern Weed Science Society. Vol. 53, 1999, p. 61. |
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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: Digitaria ischaemum; Crabgrass control; Weed control; Preemergence weed control; Application timing; Herbicides; Herbicide combinations; Preemergence herbicides; Herbicide evaluation; Autumn; Spring; Prodiamine; Dithiopyr; Germination; Application rates
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| Abstract/Contents: | "This study was conducted on a mature stand of perennial ryegrass (Lolium perene L.) at the Landscape Management Research Center, Penn State University, University Park, PA. The objective of the study was to determine the control of smooth crabgrass comparing fall versus spring applications of prodiamine and dithiopyr. All of the fall treatments were applied on Oct 17, 1997, while the spring treatments were applied on April 16, 1998, using a three foot CO[2 powered boom sprayer calibrated to deliver 80 gpa using two, flat fan, 6504 nozzles at 30 psi. Granular treatments were applied using a shaker jar. On May 6, 1998, the treatments that did not have any nitrogen applied with the herbicide received 0.5 lbs N/M from a 46-0-0 (urea) and 0.5 lbs N/M from a 31-0-0 (IBDU) fertilizer using a 3-ft. drop spreader. After each application of treatments and fertilizer, the test site received 0.5" of water. Germination of the crabgrass was first observed in bare soil areas on April 17, 1998. The morning of April 18, 1998 a heavy frost occurred and the crabgrass that had germinated was killed. Germination of crabgrass was again observed on April 27, 1998, in both bare soil and turfgrass cover locations. The test area was maintained at 7/8" using a triplex reel mower returning the clippings to the site. None of the treatments applied only in the fall controlled at the acceptable level (85%). However, dithiopyr 0.164G at 0.5 lb ai/A and prodiamine 65WDG at 1.0 lb ai/A controlled crabgrass only slightly below the acceptable level (83% and 80% control). Prodiamine 65WDG 0.75 lb ai/A and at .65 lb ai/A provided 75% and 70% control respectively. Treatments that were applied both fall and spring provided the best control. Prodiamine 65WDG at 0.65 lb ai/A fall followed by 0.38 lb ai/A spring (92%) and 0.75 lb ai/A fall followed by 0.38 lb ai/A spring (90%) were the two most efficacious treatments. When prodiamine 65WDG was applied in the fall at 0.75 lb ai/A but the sequential spring application rate was reduced to 0.25 lb ai/A or with a fall application rate of 0.65 lb ai/A followed by a spring rate of 0.25 lb ai/A the level was found to be 83%. A fall-spring application of dithiopyr 0.164G at 0.25 lb ai/A and 0.125 lb ai/A provided 87% control. Spring only applications of dithiopyr 0.164G at 0.38 lb ai/A (90%) and the 1EC formulation at 0.5 lb ai/A provided acceptable control (85%). When the rate of dithiopyr 0.164G was reduced to 0.125 lb ai/A control was reduced (63%). A spring application of prodiamine 65WDG at a rate of 0.75 lb ai/A exceeded the level of control of the fall application but still only provided 78% control." |
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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):
Watschke, T. L., and J. A. Borger. 1999. Preemergence control of smooth crabgrass with spring and fall herbicide applications. Proc. Annu. Meet. Northeast. Weed Sci. Soc. 53:p. 61. |
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| Web URL(s):
http://www.newss.org/proceedings/proceedings_1999_vol53.pdf#page=61
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. 53 |
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